IPMU

April 2011–March 2012

Annual Report 2011

IPMU

ANNUAL REPORT 2011

April 2011– March 2012

Institute for the Physics and Mathematics of the Universe (IPMU)
Todai Institutes for Advanced Study
The University of Tokyo
5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8583, Japan TEL: +81-4-7136-4940 FAX: +81-4-7136-4941 http://www.ipmu.jp/
World Premier International
Research Center Initiative

Printed in Japan

History (April 2011–March 2012)
April
May

●

The Physical Society of Japan Publication Award to Shigeki Sugimoto●Construction of IPMU Annex building completed

Focus Week “Astrophysics of dark matter”

●

June

●

New Principal Investigator in mathematics Toshiyuki Kobayashi (Todai Graduate Schoolof Mathematical Sciences)●

SuMIRe Collaboration Meeting for PrimeFocusSpectrograph●Completion of laser-guide star adaptive optics for Subaru Telescope●

External Advisory Committee meeting●

Annual site visit of the WPI working group members●

Press release “Cosmic dust at stellar explosions—Discovery of massive dust in SN 1987A”

July
AugustSeptember

OctoberA rchitectural Institute of Japan Award to Hidetoshi Ohno, professor at Todai Graduate
School of Frontier Science and the designer of IPMU Building●●

IPMU-YITP School and Workshop “Monte Carlo tools for LHC”●

The Mathematical Society of Japan Geometry Prize to Kyoji Saito●

The Mathematical Society of Japan Takebe Prize to Tomoyuki Abe●

IPMU celebrates the 4th anniversary●

Press release “Galaxy interactions accelerate the growth of supermassive black holes”●

Workshop “Curves and categories in geometry and physics”

November●Press release “Computer simulation reveals the first stars in the universe weighed about
40 times the Sun”

December●

IPMU receives “Superior” grade at the WPI interim review

January●

The 2nd PrimeFocusSpectrograph Collaboration meeting●

The 6th Asian Winter School “Strings, particles and cosmology”

Copyright ©IPMU Annual Report 2011
All rights reserved
Editorial board members
Kazuo Abe (chair), Masayuki Nakahata, Ken’ichi Nomoto, Kyoji Saito, Tsutomu Yanagida●

Press release “Independent study confirms the 2010 discovery of flat dark matter distribution●

Young Scientist Award in theoretical particle physics to Masahiro Ibe

Institute for the Physics and Mathematics of the Universe
Todai Institutes for Advanced Study, The University of Tokyo
5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8583, Japan
Tel: +81-4-7136-4940 Fax: +81-4-7136-4941
http://www.ipmu.jp●

IPMU Workshop “Testing gravity with astrophysical and cosmological observations”●

Press release “Missing dark matter located—Inter-galactic space is filled with dark matter”●

Agreement signed between NAOJ and IPMU on PrimeFocusSpectrograph●Mini workshop “Physics at SuperKEKB”●

Todai announcement of IPMU becoming Kavli IPMU●

IPMU Conference “Growing black holes in COSMOS”●

Inoue Science Prize for Young Scientist to Masaomi Tanaka●

Sloan Research Fellowship to Brice Menard

Design: aha co., ltd.
http://www.a-ha.co.jp/

and improves the precision”

February

March●

IPMU Workshop “Particle physics of the dark universe”●

Yoji Totsuka Memorial Prize to Masataka Fukugita and Tsutomu Yanagida
IAU Symposium 279 “Death of massive stars: Supernovae and gamma-ray bursts”●●

The Japan Academy Award to Takaaki Kajita●

SuMIRe/PFS conceptual design review and technical group meetings

IPMU Annual Report 20111

Mission

1 Mission
In addition to these findings that there are unknown components in the universe, there are also mysteries
about the components that should exist yet we don’t find. Anti-matter can be created in the laboratory andwas surely created in Big Bang. Yet we do not see it in the universe.
Furthermore, we know the universe is superconducting and makes certain kinds of forces short-ranged within a billionth of a nanometer while keeping electromagnetism and gravity long-ranged. The energy densityof the superconductor should contribute about 1062% to that of the universe, which must be cancelled by yet
another component at an incredible accuracy. It is natural to suspect some underlying reason which we do notknow yet rather than accepting it as a lucky coincidence.

Why Physics and Mathematics?
The reason for the combination of physics and mathematics is quite obvious. Throughout the history of physics, it was an invention of new mathematics that offered helping hand whenever a paradigm shift was inevitable in physics. It has been the case, and will be for the foreseeable future. Physics, being the most quantitative
among sciences, relies heavily on the most advanced types of mathematics.

Director Hitoshi MurayamaInitial four and half years have passed since we started a mission to establish an entirely
new institute and address fundamental questions of the universe. As far back as the history goes, human beings have always pondered about the origin of the universe, how it isstructured, how it works, and where it is going. Our mission is to address these most ancientand fundamental questions that were once studied only by pure thought by using modern technology and development of theoretical framework.
Startup stage of the new institute is well over. We are in a creative mode and moving on withthe mission, mostly sticking to the original plan but with some modifications in accordancewith recent progresses that has been taking place in these research areas with rapidly increasing speed. Here let us restate our mission.

We Face Big Challenges
For centuries, humans had believedthat the entire universe is made of
the same material we are made of,namely atoms. In the past decade, thisbelief was completely overturned. The
atoms make up less than 5% of theuniverse. The dark matter comprises
the rest of the matter, about 22% of
the universe, yet we do not know what
it is. The remainder of about 73%isdark energy which we know even less.
It is thought to be responsible for theaccelerated expansion of the universe,
and its discovery had led to the 2012Nobel Prize in Physics.

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IPMU Annual Report 2011

Atoms: 4.4%

Stars: 0.5%

Neutrinos: 0.1%?

Dark Matter:

22%

Does not emit light and invisible to us, butneeded for holding the galaxies together.

Dark Energy:

73%
Composition of the universe

Distributed across the Universe
and responsible for the accelerated
expansion.

The big challenges we face today cry out for a new paradigm of the universe, and hence new physics and newmathematics.

Three Experimental Approaches
Prof. Koshiba who won 2002 Nobel Prize in physics for detecting neutrinos from the supernova 1987A with
the Kamiokande detector demonstrated that neutrinos can be used to study the universe in a way not imagined before. Furthermore the Super-Kamiokande and KamLAND experiments had discovered that ghostly
neutrinos have tiny but finite masses at the level predicted by the unified theories at 13 orders of magnitude
beyond the reach of the current accelerator experiments. Thus, the neutrino masses are giving us a precious
glimpse of physics at the ultra-high energy and very early universe. It is perhaps ironic that the best way to
study the universe is to go underground. Underground experiments are also likely avenues to discover thedark matter of the universe.
Looking up at the sky is undoubtedly a very essential experimental approach for exploring the universe. Bothin ground-based and space-based observations, we have made great strides in recent years. It is the sky observation that determined the breakdown of the composition of the universe. Large-scale galaxy surveys further
revolutionize our understanding of the universe. The scope of the galaxy survey using the Subaru telescopeis greatly expanded due to the 2009 approval of the SuMIRe project. It combines the originally envisioned
imaging survey with a newly proposed spectroscopic survey.
The most direct assault on the mysteries of the universe comes from the brute-force method that tries to recreate the Big Bang in the laboratory, namely particle accelerators. The world highest energy LHC accelerator
is capable of mimicking the Big Bang in a “Little Bang” that brings us direct and critical information on thecondition at the birth of the universe. The other type of accelerators operates at lower energies of particularinterest but with an enormous beam intensity. High precision measurements at newly proposed SuperKEKB
can be sensitive to the presence of new particles and new interactions beyond the Standard Model. Any new
finding at these accelerators and figuring out their roles in the universe should be one of the most far-reachingconsequence of our mission.
The T2K experiment that detects the neutrinos from the J-PARC accelerator at the Super-Kamiokande is a
mixture of accelerator-based and underground-based approaches. It is a novel way to attack the mystery why
we exist in the universe at all, namely the preponderance of matter over anti-matter.

IPMU Annual Report 20113

The multi-prong experimental assault onthese three fronts, namely underground, sky,and accelerator, must be tied with common
threads of theoretical physics, mathematics,
instrumentation and applied mathematics.
Theoretical physics develops the unified description of the universe based on the available data, and allows us to guide the futureplans for next-generation experiments. Theoretical framework that is capable of tacklingthe challenging mystery at the birth of theuniverse almost certainly needs new types ofhighly sophisticated pure mathematics.
Applied mathematics and statistics provide novel approach to deal with huge data set provided from advanced
experiments. The upcoming data from galaxy surveys, accelerator and underground are measured in Petabytes(billion Megabytes) and pose an incredible challenge in extracting critical scientific information out of them.
Importance of instrumentation as the common threads is obvious. They make difference whether we can reacha breakthrough in the observations. We can benefit great deal from a well coordinated approach in the instrumentation of the three fronts.

Contents
1 Mission … …………………………………………………………………………… 2
2 Introduction … ……………………………………………………………………… 6
3 Organization ………………………………………………………………………… 8
4 Staff…………………………………………………………………………………… 12
5 Research Program… ……………………………………………………………

16

		 5.1

Alternative Gravity Theories……………………………………………………………………… 16

		 5.2Astroparticle Physics……………………………………………………………………………… 17

		 5.3Collider Phenomenology… ……………………………………………………………………… 19

		 5.4

Cosmology and Statistics… ……………………………………………………………………… 20

		 5.5

Dark Matter Experiment…………………………………………………………………………… 21

		 5.6Detector Developments…………………………………………………………………………… 22

		 5.7

Inflation and Early Universe… …………………………………………………………………… 23

		 5.8Mathematics………………………………………………………………………………………… 24

		 5.9Models beyond the Standard Model… ………………………………………………………… 27

		 5.10

Neutrino Physics…………………………………………………………………………………… 29

		 5.11

Observational Cosmology … …………………………………………………………………… 31

		 5.12

Proton Decay … …………………………………………………………………………………… 33

		 5.13String Theory… …………………………………………………………………………………… 34

		 5.14Structure Formation… …………………………………………………………………………… 35

Necessary Ingredients		 5.15

Supernova… ……………………………………………………………………………………… 36

We conduct three major underground experiments. ZEN at KamLAND looks for a possible conversion of antimatter (anti-neutrino) to matter (neutrino) in a very rare process called neutrinoless double beta decay. EGADS
at Super-Kamiokande tries to enhance the sensitivity of detecting (anti-)neutrinos from the distant supernovae.
XMASS aims to directly detect dark matter particles that are thought to pervade our Milky Way galaxy.

6 Research Highlight: First Four and Half Years ………………………… 38

We take two complementary approaches in observational astronomy. Wide-scale surveys with ongoing Sloan
Digital Sky Survey III, with the just-starting HyperSprimeCam, and with the future PrimeFocusSpectrograph,investigate dark matter and dark energy by studying the expansion history of the universe. On the other hand,dedicated studies of particular type of astronomical objects such as supernovae and clusters are not only of theirown interests but prove crucial for detailed understanding and interpretation of the wide-scale survey results.
Results from observational astronomy have to be interpreted in the context of theoretical framework. This
framework includes computational approaches in cosmology for studying the evolution of the structure in theuniverse. Similarly, theoretical approaches in particle physics are taken to understand the data from accelerator
experiments and high-energy cosmic rays.
We try to decipher the basic laws of the universe from the observations and phenomenological analyses. Being
guided mostly by quantum field theory and string theory, we aim to develop new theories that can describe theentire range of physics, including the beginning of the universe, unification of quantum mechanics and gravity,
black holes, dark matter and dark energy.
Mathematicians at IPMU work closely with physicists. This is particularly true with the string theorists. They
discuss together the subjects such as mirror symmetry and Calabi-Yaumanifolds, derived category, D-branes,
integrable systems.
Our research program covers a wide range of subjects. They are all critical ingredients for addressing the fundamental questions of the universe.

MissionCommon Threads

6.1

Experimental Physics……………………………………………………………………………… 38

			

6.1.1 ZEN… ……………………………………………………………………………………… 38

			

6.1.2 EGADS……………………………………………………………………………………… 39

			

6.1.3 XMASS……………………………………………………………………………………… 40

		 6.2

Observational Astronomy… ……………………………………………………………………… 40

			

6.2.1 Wide-scale Surveys… …………………………………………………………………… 40

			

6.2.2 Dedicated Studies ………………………………………………………………………… 42

		 6.3

Theoretical Astrophysics and Phenomenological Particle Physics ………………………… 43

			

6.3.1 Computational Astrophysics and Cosmology… ……………………………………… 43

			

6.3.2 Large-scale Structure……………………………………………………………………… 43

			

6.3.3 Collider Phenomenology … ……………………………………………………………… 44			

6.3.4 Cosmic-ray Phenomenology……………………………………………………………… 44

		 6.4

Fundamental Theory… …………………………………………………………………………… 45

			

6.4.1 Model Building……………………………………………………………………………… 45

			

6.4.2 Fundamental Laws and Alternative Gravity Theories… ……………………………… 45

			

6.4.3

		 6.5Mathematics………………………………………………………………………………………… 46

Applications to Other Areas……………………………………………………………… 46

7 Awards… ……………………………………………………………………………48
8 Seminars………………………………………………………………………………50
9 Conferences …………………………………………………………………………58
10 Conference Talks ……………………………………………………………………60
11 Visitors … …………………………………………………………………………… 70
12 Publications… ………………………………………………………………………82
13 Preprints………………………………………………………………………………98
14 Outreach and Public Communications ………………………………………… 108

4

IPMU Annual Report 20115

Introduction

2 IntroductionT

he most exciting moment for us in JFY 2011 came on December 14 with an MEXT announcement of an interim evaluation result in which we were given the highest grade“S” (Superior). This evaluation by MEXT was a part of review processes for the first
four years since the launch of the initially selected five WPI research centers. The report madethe following comment on IPMU.

Interim evaluation: S
We all highly evaluate IPMU’s past four years of activities and scientific achievements. During a short period, IPMU has established itself as a world-renown institute from scratch. IPMU
has demonstrated outstanding progress toward achieving the goals of the WPI program in allareas—quality of science, globalization, interdisciplinary approach, and organizational reform.
The leadership of Professor Murayama is highly appreciated.
Press Conference for Kavli IPMU (February 8, 2012)

Director Hitoshi Murayama was very excited tohear the result. He shared the good news withall staff members, saying “I’m so happy to receive the highest grade after the rigorous review
process from the summer to the fall this year. It
is a very ambitious goal for young WPI centers
to attain a high visibility in the world comparable to world-leading research centers withlong traditions. We have focused intensively onbuilding an attractive and exciting research institute that pays a lot of attention to accommodate researchers comfortably, especially thosefrom other countries. This strategy seemed tohave paid off handsomely. This would not havebeen possible without a strong support from the
University, competent administrative staff, andfrom the public at large. We have been ramping
up several big projects that are coming to thephase of producing data and science. The next
five years are when we have to work hard totruly shine.”
The interim report, however, did not end withthe only good news. It imposed three actions
which should be taken for further strengthening
its research program, namely, i) Todai should
secure a certain number of tenure positions
for IPMU, ii) IPMU should make foreign joint
appointments at the faculty levels for enhancing personal exchanges, and iii) IPMU should
strengthen the research area of data mining andinformatics for forthcoming cosmology observations. Murayama continues to push hard for

6

IPMU Annual Report 2011

the items ii) and iii), and to negotiate with Todai President’s office for the item i).
While preparing for the interim evaluation wasa big burden, it was a good opportunity for us
to reexamine the research strategy and makenecessary adjustments in accordance with rapidly progressing activities worldwide during thepast four years. For accelerator-based research,
our original strategy was to participate at LHC
in both experiment and phenomenologicalanalyses. However, it is difficult for us to makean impact on the experimental effort given its
advanced stage. So our involvement is limited
to phenomenology using the released data. Instead, we plan to join Belle II experiment at SuperKEKB for the study of super symmetry andother new physics possibilities. IPMU will participate in both detector construction and physics analyses. The scope of galaxy survey using
the Subaru telescope is greatly expanded compared with the originally projected plan after anapproval of the SuMIRe (Subaru Measurementof Images and Redshifts) project. It combines
the originally envisioned imaging survey using
HyperSprimeCam (HSC) with new spectroscopic survey using PrimeFocusSpectrograph(PFS). IPMU leads the formation of the PFS
international collaboration and construction of
the new spectrograph. Scientific achievementsof the past four and half years are summarized
in the chapter of Research Highlight.

Another big event of JFY 2011 was an announcement of February 8, 2012 from the University ofTokyo on the establishment of endowment by the
Kavli Foundation for IPMU, hence the name of theInstitute will be changed to “Kavli IMPU” (Kavli
Institute for the Physics and Mathematics of the
Universe) starting April1, 2012. At the press conference, the Todai president Junichi Hamada thanked
Fred Kavli, the founder of the foundation, whojoined via TV connection, for his generous donation. “This donation has provided the occasion toreexamine and reform our systems for managing
donated funds,” he said. The Kavli Foundation,
based in Southern California, sponsors research inastrophysics, nanoscience, neuroscience and theoretical physics at institutes across the globe including China, England, Netherlands, Norway and theUnited States. The Kavli IPMU will be its 16th institute, its sixth in astrophysics and third in theoretical physics, and the first to be established in Japan.
Including principal investigators, faculty members,
postdoctoral fellows, affiliate members, long-term
visitors and students, IPMU has now grown to aninternational research center for 219 core researchers. Their activities are supported by 38 administrative and research support staff. Besides the coreresearchers, we routinely receive many short-term
visitors. We have published 252 papers in JFY
2011. Their quality is competitive with other toplevel places based on citation counts.

Number of Core Researchers (March 2012)
NumberForeign

Principal Investigators

19

4

Professors (not including 4 PIs)

6

1

Associate Professors

102

Assistant Professors

93

Postdoctoral Fellows

45

34

Affiliate Members

8934

Long-term Visitors

13

13

Students

28

0

Total

219

91

Research Activities in JFY 2011
Conferences

12

Seminars

196

Visitors (foreign)

630 (392)

Preprints

216

Publications

252

IPMU Annual Report 2011

7

IPMU has a rather unique organization. While
research is conducted in a flat-structure manner with loosely defined grouping, the decision
making is done in a top-down scheme under
the Director’s strong leadership. This scheme
minimizes the administrative load for the researchers. It is also intended to maximally extract young researcher’s creative and challenging minds as well as to encourage daily crossdisciplinary interactions.
The IPMU Director is appointed by the Todai
President and reports directly to his office. The
Director proposes to hire the Principal Investigators to the President. For other hiring ofresearch staff and administrative staff, he has acomplete authority. He is also solely responsible
for making all other decisions. He is assisted by
two Deputy Directors and the Administrative
Director. They hold the Executive Board (EB)regularly to ensure smooth operation of the Institute. The EB has direct access to the Officeof the President for consultations on both scientific and administrative matters.

Committee consisting of the EB members plus two
faculty members.

With the establishment of Todai Institutes for
Advanced Study (TODIAS), the Director is
obliged to report the appointments of new Principal Investigators and faculty members to the
TODIAS Director. Also, to clear the university
formality in faculty hiring, the IPMU decisions
have to be endorsed by the IPMU Steering

The Scientific Advisory Committee (SAC) gives
advice to the Director on hiring scientific staff andsetting scientific strategies. The members, consisting of two Deputy Directors and five Principal Investigators, are appointed by the Director.

IPMU
TODIAS

Director

Junichi Hamada

Director: Sadanori Okamura

Hitoshi Murayama

IPMU External
Advisory Committee

Administrative
Director
Kenzo Nakamura

The Principal Investigators are the world’s leading
scientists in their fields. They have a large autonomy
in the research they conduct. They can make proposals to the Director to hire research staff at IPMU
for their purposes.

The Scientific Advisory Committee Members (March 2012)
IPMU Management

President

The External Advisory Committee (EAC), appointed by the Todai President, reviews annually thescientific achievement and activities of the Instituteand advises the President on scientific priorities andthe research activities to keep the Institute stay on
the course of their objectives.

Organization

3 Organization

Hiroaki Aihara
Yoichiro Suzuki
Toshitake Kohno
Hirosi Ooguri
Kyoji Saito
David Spergel
Tsutomu Yanagida

U of Tokyo Physics Dept
U of Tokyo, ICRRU of Tokyo Mathematics Dept
Caltech
IPMU
Princeton U
IPMUhigh energy physics
astroparticle physics
mathematics
particle theory
mathematics
astrophysics
particle theory

Deputy Director
Hiroaki Aihara
Yoichiro Suzuki

The External Advisory Committee Members (March 2012)
Scientific Advisory
Committee

Steering Committee

Executive Board
Chair

Hitoshi Murayama
Hiroaki Aihara
Yoichiro Suzuki
Kenzo Nakamura

Director
Deputy Director
Deputy Director
Administrative Director

Kyoji Saito
Tsutomu Yanagida

Principal Investigator
Principal Investigator

IPMU Research

Principal Investigators
Faculty, Postdocs, Students, Visitors

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IPMU Annual Report 2011

John Ellis
Makoto Gonokami
Young-Kee Kim
Sadayoshi Kojima
David Morrison
Roberto Peccei
Steven Kahn

CERN
U of Tokyo
Fermilab/U of Chicago
Tokyo TechUC Santa Barbara
UCLA; Chair
SLAC/Stanford U

The main laboratory building on Kashiwa Campus
provides a basis for our researchers. Even mostof experimentalists who are involved in Kamioka
experiments and telescopes spend a good fractionof their time in Kashiwa for analyzing data, sharing seminars and discussing with theorists. The
IPMU Kamioka Branch is a basis for IPMU staff
who are working at the Kamioka experiments. The

particle theory
quantum optics
high energy physics
mathematics
mathematics and physics
particle theory
astrophysics

IPMU Berkeley Satellite, besides being a place forresearch, serves as a contact place to the US scientific community. We also have a close collaborative relation with several institutions in both Japanand abroad as well as other departments within the
University of Tokyo.

IPMU Annual Report 20119

Department of Mathematics
Institute for Cosmic Ray Research(Kashiwa, Kamioka)
Department of Physics
Department of Astronomy

Collaborating Institutions

Collaborating Institutions (domestic)
National Astronomical
Observatory in Japan

IPMU

Department of Physics,
Kyoto University

Kashiwa Campus
Kamioka Branch(international)

Department of Astrophysical Sciences,
Princeton University, USA

Organization

Host Institute (Univ. of Tokyo)

Berkeley
Satellite

Institut des Hautes
Etudes Scientifiques (IHES), France

High Energy Accelerator
Research Organization (KEK)
Yukawa Institute for
Theoretical Physics,
Kyoto University
Research Center of
Neutrino Science,
Tohoku University

IPMU holds close relations with similar research institutions in the world for encouraging exchanges
in research and training of young staff. We have signed either agreements or memorandum of understanding with those institutions.

Foreign institutions having exchange program with IPMU
University of California Berkeley, Physics Department
University of Chicago, Department of Astronomy and Astrophysics
Institute for Advanced Study, School of Natural Sciences
Johns Hopkins University, Department of Physics and Astronomy
New Mexico State University, Astronomy Department
Princeton University, Department of Astrophysical Sciences
University of Washington, Astronomy Department
Washington State University, Department of Mathematics
Stanford University, Kavli Institute for Particle Astrophysics and Cosmology (KIPAC)
Technical University of Munich, Physics Department
Ludwig Maximilian University of Munich, Physics Department
Max Planck Institute, Astronomy and Astrophysics
Max Planck Institute, Extra-terrestrial Physics
Max Planck Institute, Physics Department
European Southern Observatory (ESO)
National Taiwan University, Research Center for Cosmology and Particle Astrophysics

10

IPMU Annual Report 2011

IPMU Annual Report 201111

Hitoshi Murayama, particle theory, cosmology
Ken’ichi Nomoto, astronomy
Masamune Oguri, cosmology
Kyoji Saito, mathematics
John Silverman, astronomy
Hajime Sugai, astronomy
Shigeki Sugimoto, string theory
Yuji Tachikawa, string theory
Masahiro Takada, cosmology
Tadashi Takayanagi, string theory
Naoyuki Tamura, astronomy
Yukinobu Toda, mathematics
Akihiro Tsuchiya, mathematics
Mark Vagins, astroparticle physics
Taizan Watari, string theory
Tsutomu Yanagida, particle theory
Naoki Yasuda, astronomy
Naoki Yoshida, astrophysics

Postdoctoral Fellows

IPMU research staff at the 4th anniversary celebration

Director
Hitoshi Murayama, particle theory, cosmology

Deputy Directors
Hiroaki Aihara, high energy physics, astrophysics
Yoichiro Suzuki, astroparticle physics,
neutrino physics

Mihoko Nojiri (KEK), particle theory
Ken’ichi Nomoto (IPMU), astronomy
Hirosi Ooguri (Caltech), mathematics, string
theoryKyoji Saito (IPMU), mathematics
Henry Sobel (UC Irvine), astroparticle physics
David Spergel (Princeton), astrophysics
Naoshi Sugiyama (Nagoya), cosmology
Yoichiro Suzuki (Tokyo ICRR), astroparticle
physics
Tsutomu Yanagida (IPMU), particle theory

Principal Investigators
Hiroaki Aihara (Tokyo Phys), high energy
physics, astrophysics
Alexey Bondal (IPMU & Steklov Inst),
mathematics
Masataka Fukugita (Tokyo ICRR), astrophysics
Kunio Inoue (Tohoku), neutrino physics
Takaaki Kajita (Tokyo ICRR), neutrino physics
Stavros Katsanevas (Paris 7), astroparticle
physics
Toshiyuki Kobayashi (Tokyo Math), mathematics
Toshitake Kohno (Tokyo Math), mathematics
Hitoshi Murayama (IPMU & UC Berkeley),particle theory, cosmology
Masayuki Nakahata (Tokyo ICRR),
astroparticle physics

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IPMU Annual Report 2011

Faculty Members
Tomoyuki Abe, mathematics
Alexey Bondal (Joint Appointment with Steklov
Inst), mathematics
Kevin Bundy, astronomy
Simeon Hellerman, string theory
Kentaro Hori, string theory
Hiroshi Karoji, astronomy
Satoshi Kondo, mathematics
Keiichi Maeda, astronomy
Kai Martens, astropharticle physics
Shigeki Matsumoto, cosmology
Todor Milanov, mathematics
Shinji Mukohyama, cosmology

Cosimo Bambi (till August 2011), cosmology
Melina Bersten, astronomy
Jyotirmoy Bhattacharya, string theory
Biplob Bhattacherjee, particle theory
Scott Carnahan, mathematics
Chuan-Ren Chen (till August 2011), particle theory
Won Sang Cho (till August 2011), particle theory
Rafael Da Silva De Souza (till August 2011),
cosmology
Yu-Chieh Chung, string theory
Richard Eager, string theory
Jason Evans, particle theory
Brian Feldstein, particle theory
Gaston Folatelli, astrophysics
Sergey Galkin, mathematics
Alexander Getmanenko, mathematics
Ahmet Emir Gumrukcuoglu, cosmology
Minxin Huang, string theory
Emille Ishida (till August 2011), cosmology
Johanna Knapp, string theory
Alexandre Kozlov, neutrino physics
Tsz Yan Lam, astrophysics
Alexie Leauthaud, astronomy
Changzheng Li, mathematics
Chunshan Lin, cosmology
Wei Li (till August 2011), string theory
Jing Liu, astroparticle physics
Sourav Mandal, particle theory
Yu Nakayama, string theory
Takahiro Nishimichi, astrophysics
Atsushi Nishizawa, astronomy
Takaya Nozawa, astronomy
Noriaki Ogawa, particle theory
Yutaka Ookouchi, particle theory
Domenico Orlando (till September 2011),
string theory

Michael Pichot (till June 2011), mathematics
Susanne Reffert (till September 2011), string theory
Robert Quimby, astronomy
Tomoki Saito, astronomy
Kenneth Shackleton (till October 2011),
mathematics
Cornelius Schmidt-Colinet, string theory
Johannes Schmude, string theory
Christian Schnell, mathematics
Malte Schramm, astronomy
Ikko Shimizu, astrophysics
Jing Shu (till August 2011), particle theory
Charles Steinhardt, astronomy
Matthew Sudano, particle theory
Masaomi Tanaka (till November 2011), astronomy
Masayuki Tanaka, astronomy
Jiayu Tang (till June 2011), cosmology
Valentin Tonita, mathematics
Shunsuke Tsuchioka, mathematics
Mircea Voineagu, mathematics
Kai Wang (till May 2011), particle theory
Marcus Werner, mathematical physics
Simon Wood, mathematics

Staff

4 Staff

Graduate Students
Gen Chiaki, astrophysics
Tomohiro Fujita, particle theory
Keisuke Harigaya, particle theory
Koji Ichikawa, mathematics
Ayuki Kamada, particle theory
Yasuomi Kamiya, astronomy
Takuma Kurokawa, astrophysics
Takashi Matsuda, mathematics
Sogo Mineo, high energy physics
Hironao Miyatake, high energy physics
Takashi Moriya, astronomy
Kimihiko Nakajima, astronomy
Ryoichi Nishio, particle theory
Kohei Nishiyama, particle theory
Hidemasa Oda, mathematics
Tomoki Ohtsuki, mathematics
Ryosuke Sato, particle theory
Masato Shirasaki, astrophysics
Kohsaku Tobioka, particle theory
Tomonori Ugajin, particle theory
Kouta Usui, particle theory
Wen Yin, particle theory
Kazuya Yonekura, particle theory

IPMU Annual Report 201113

Kou Abe (Tokyo ICRR), astroparticle physics
Mina Aganagic (UC Berkeley), string theory
Raphael Bousso (UC Berkeley), cosmology
Patrick Decowski (NIKHEF), high energy physics
Mamoru Doi (Tokyo Astron), astronomy
Yuri Efremenko (Tennessee), neutrino physics
Tohru Eguchi (Kyoto YITP), field theory
Motoi Endo (Tokyo Phys), string theory
Sanshiro Enomoto (Washington), neutrino physics
Masami Ouchi (Tokyo ICRR), astronomy
Andrea Ferrara (S.N.S. Pisa), astronomy
Stuart Freedman (LBNL), neutrino physics
Brian Fujikawa (LBNL), neutrino physics
Masaki Fukushima (Tokyo ICRR), astroparticle
physics
Kaoru Hagiwara (KEK), particle theory
Lawrence Hall (UC Berkeley), particle theory
Koichi Hamaguchi (Tokyo Phys), particle theory
Tetsuo Hatsuda (Tokyo Phys), particle theory
Yoshinari Hayato (Tokyo ICRR), neutrino physics
Masashi Hazumi (KEK), astrophysics
Karsten Heeger (Wisconsin), neutrino physics
Katsuki Hiraide (Tokyo ICRR), astroparticle physics
Raphael Hirschi (Keele), astronomy
Junji Hisano (Tokyo ICRR), particle theory
Petr Horava (UC Berkeley), string theory
Glen Horton-Smith (Kansas), neutrino physics
Shinobu Hosono (Tokyo Math), mathematicalphysics
Masahiro Ibe (Tokyo ICRR), particle theory
Ken’ichi Izawa (Kyoto YITP), particle theory
Hiroshi Kaji (Tokyo ICRR), high energy physics
Jun Kameda (Tokyo ICRR), neutrino physics
Masaki Kashiwara (Kyoto RIMS), mathematics
Akishi Kato (Tokyo Math), mathematical physics
Yasuyuki Kawahigashi (Tokyo Math), mathematics
Seiji Kawamura (Tokyo ICRR), astroparticle physics
Masahiro Kawasaki (Tokyo ICRR), cosmology
Edward Kearns (Boston), neutrino physics
Sergey Ketov (Tokyo Met U), cosmology
Chiaki Kobayashi (Australia), astronomy
Kazuyoshi Kobayashi (Tokyo ICRR), astroparticle
physics
Masayuki Koga (Tohoku), neutrino physics
Eiichiro Komatsu (Texas), cosmology
Yusuke Koshio (Tokyo ICRR), neutrino physics
Takahiro Kubota (Osaka), string theory
Alexander Kusenko (UCLA), particle theory,
astrophysics
Andrew Liang (Tokyo ICRR), neutrino physics
Marco Limongi (INAF Rome), astronomy
Brice Menard (Johns Hopkins), cosmology
Makoto Miura (Tokyo ICRR), high energy physics
Shigetaka Moriyama (Tokyo ICRR), neutrino
physics
Takeo Moroi (Tokyo Phys), particle theory
Kengo Nakamura (Tohoku), neutrino physics
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IPMU Annual Report 2011

Tsuyoshi Nakaya (Kyoto), high energy physics
Shoei Nakayama (Tokyo ICRR), neutrino physics
Kazunori Nakayama (Tokyo Phys), particle theory
Yasunori Nomura (UC Berkeley), particle theory
Hiroshi Ogawa (Tokyo ICRR), astroparticle physics
Kimihiro Okumura (Tokyo ICRR), neutrino physics
Christian Ott (Caltech), astrophysics
Masami Ouchi (Tokyo ICRR), astronomy
Serguey Petcov (SISSA), particle theory
Andreas Piepke (Alabama), neutrino physics
Yoshihisa Saito (Tokyo Math), mathematics
Hidetaka Sakai (Tokyo Math), mathematics
Katsuhiko Sato (NINS), cosmology
Kate Scholberg (Duke), neutrino physics
Hiroyuki Sekiya (Tokyo ICRR), neutrino physics
Masato Shiozawa (Tokyo ICRR), neutrino physics
Fedor Smirnov (Paris 6), mathematics
Michael Smy (UC Irvine), neutrino physics
James Stone (Boston), high energy physics
Fuminobu Takahashi (Tohoku), particle theory
Ryutaro Takahashi (Tokyo ICRR), astroparticle
physics
Atsushi Takahashi (Osaka), mathematics
Atsushi Takeda (Tokyo ICRR), astroparticle physics
Yasuo Takeuchi (Tokyo ICRR), neutrino physics
Atsushi Taruya (Tokyo RESCEU ), astrophysics
Nozomu Tominaga (Konan), astrophysics
Edwin Turner (Princeton), astrophysics
Misha Verbitsky (HSE Natl Res U), mathematics
Alexander Voronov (Minnesota), mathematics
Christopher Walter (Duke), neutrino physics
Kazuhiro Yamamoto (Tokyo ICRR), gravity
Masaki Yamashita (Tokyo ICRR), high energy
physics
Jun’ichi Yokoyama (Tokyo RESCEU), astrophysics
Masashi Yokoyama (Tokyo Phys), high energy
physics
Ken-ichi Yoshikawa (Tokyo Math), mathematics

Raphael Ponge (Tokyo Math), mathematics
Alexey Rosly (ITEP), mathematics
Yefeng Shen (Michigan), particle theory
Elena Sorokina (Sternberg Astro Inst), astronomy
Tröster Tilman (ETH Zurich), gravity
Edwin Turner* (Princeton), astrophysics
Marcos Valdes (SNS Pisa), astrophysics
Misha Verbitsky* (HSE Natl Res U), mathematics
Alexander Voronov* (Minnesota), mathematics

Kayoko Kubota

Administration and Support(*section head)

Hideki Tanaka* (Project Assistant Professor),
Aya Tsuboi

Kenzo Nakamura, Administrative Director (Project
Professor)
Hiroaki Inagaki, General Manager
Yonetaka Takano, Senior Specialist
Akira Ito, Senior Specialist

Director’s Secretary

Yuuko Enomoto

Public Relations
Yoshihisa Obayashi* (Project Associate Professor),
Tomomi Hijikata

Library

Computing and Website
Staff

Affiliate Members

Documentation
Kazuo Abe

Kamioka Branch Office
Hiroyuki Kanda*, Sumiko Higashi, Motoichi
Kanazawa, Yoko Shimizu

General Affairs
Takashi Ikeda*, Mika Miura, Kazuko Ohmoto

Accounting and Financing
Yonetaka Takano*, Kanako Fusawa, Naoko Ishida,
Tomoko Yamanaka, Hiromi Yoshida

Purchasing
Long-term Visitors(more than 1 month, * affiliate member)
Steven Bickerton (Princeton), astrophysics
Debajyoti Choudhury (Delhi), astrophysics
Alexander Dolgov (Ferrara), particle theory
Stuart Freedman* (LBNL), neutrino physics
Brian Fujikawa* (LBNL), neutrino physics
Chang Kee Jung (SUNY Stony Brook), neutrino
physics
Eiichiro Komatsu* (Texas), cosmology
Alexander Kusenko* (UCLA), particle theory
Tristan Laine Smith (UC Berkeley), cosmology
Hung-Hsu Ling (ASIAA), astronomy
Brice Menard* (CITA), cosmology
Tatsuma Nishioka (Princeton), string theory
Serguey Petcov* (SISSA), particle theory

Yasuhiro Kato*, Tatsuya Koreeda,
Yoshiya Ootaka, Satomi Utsumi

SuMIRe Project
Hideaki Maruyama, Chihiro Imai, Yuki Ishizuka,
Atsushi Shimono (Academic Support)

International Relations and Researchers Support
Midori Ozawa*, Yuichi Hattori, Kotoe Kawajiri,
Rie Kohama, Hisami Kuboshima, Masami
Nishikawa (Japanese instructor), Tomoko Shiga,
Rieko Tamura, Rie Ujita (Symposium andWorkshops)
IPMU Annual Report 201115

5.1 Alternative Gravity Theories

Patrick Decowski

Kai Martens

Emir Gumrukcuoglu

Shigeki Matsumoto

Brian Feldstein

Shinji Mukohyama

Andrea Ferrara

Yasunori Nomura

Emir Gumrukcuoglu

Ryutaro Takahashi

Karsten Heeger

Christian Otto

John Kehayias

Atsushi Taruya

Junji Hisano

Henry Sobel

Chunshan Lin

Edwin Turner

Ayuki KamadaCharles Steinhardt

Shinji Mukohyama

Marcus Werner

Masahiro Kawasaki

James Stone

Charles Steinhardt

Jun’ichi Yokoyama

John Kehayias

Yoichiro Suzuki

Alexander Kozlov

Masahiro Takada

Alexander Kusenko

Mark Vagins

Keiichi Maeda

Tsutomu Yanagida

Masahiro Takada

Einstein’s theory of relativity unifies a 3-dimensional space and a 1-dimensional time as a spacetimeand describes gravity as a fabric of curved spacetime. This picture has been very successful in explaining and predicting many gravitational phenomena. Experimentally, however, we do not know
how gravity behaves at distances shorter than 0.01 mm. At shorter distances, gravity may behave
completely differently from what we expect. For example there may be hidden dimensions at shortdistances. In fact, many theories, including superstring theories and M-theory, require the existence ofsuch extra dimensions. Extra dimensions may exist everywhere in our universe, but they are somehow
hidden from us. One possibility recently investigated very actively is called the brane-world scenario.
In this scenario our universe is supposed to be a 3-dimensional surface, called brane, floating in higher-dimensional space. Although we cannot see extra-dimensions directly, we may hope to detect someindirect evidence of extra-dimensions in high-energy experiments or cosmological observations.
Gravity at very long distances (for example, billions of light-years) may also be as weird as at shortdistances. Precision observational data recently
revealed that the expansion of our universe is accelerating. If Einstein’s theory is correct, this requiresthat more than 70% of our universe is filled withinvisible, negative pressure, energy. This energy isnamed dark energy, but we do not know what it really is. This situation reminds us of a story in the
19th century: when the perihelion shift of Mercury
was discovered, some people hypothesized the existence of an invisible planet called Vulcan, a soto-speak dark planet, to explain the anomalous
behavior of Mercury. However, as we all know, thedark planet was not real and the correct explanation was to change gravity, from Newton’s theory to
Einstein’s. With this in mind, we wonder if we canchange Einstein’s theory at long distances to address the mystery of dark energy.

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5.2 Astroparticle Physics

IPMU Annual Report 2011

Research Program

5 Research Program

Sourav Mandal

Artist’s conception of a supermassive black hole in the center of an active galaxy
Credits: NASA

High-energy phenomena naturally occurring in the universe provide a wealth of data and new valuable insights
into particle physics and cosmology. IPMU researchers use the universe as a laboratory for testing new theories ofdark matter and new physics beyond the Standard Model, and for understanding the basic properties of the universe. In the past year, several exciting developments in particle astrophysics were initiated by IPMU members.
Dark Matter
Its existence is supported by a substantial body of astrophysical evidence, but the identity of the dark matter particle (or particles) remains a mystery. Since one does not know the interactions of dark matter particles, besides
their gravitational interactions, one must pursue a broad range of possibilities.
One necessary condition is that the dark matter particles must be stable on cosmological time scales. Stability isoften associated with asymmetry. So, one may approach the question of dark matter identity by asking what symmetries might guarantee the stability of dark matter. A very powerful symmetry is the conservation of (B − L),the difference between the baryon and lepton numbers. Ibe, Matsumoto, and Yanagida have pointed out that, if
dark matter takes advantage of this formidable symmetry, then the dark matter particle must have a well definedmass, independent of the details of new physics. The researchers provided two very appealing examples, one ofwhich can explain an unusual signal recently reported by one of the experiments.
Matsumoto and collaborators explored another possible connection between a symmetry and dark matter. Weaklyinteracting massive particle (WIMP) is one of the most popular dark-matter candidates, which emerges in manymodels of new physics at the TeV scale. Matsumoto and collaborators have pointed out that, if the WIMP is a vector particle associated with some gauge symmetry broken at the TeV scale, then the Higgs mass is often predicted
to be 120–125 GeV range, consistent with Large Hadron Collider results.

IPMU Annual Report 201117

Another well-motivated dark matter candidate is a very light scalar particle, called axion. Kawasaki and collaborators have described the production of these particles from the collapse of domain walls, which could haveformed in the early universe because of topological properties of the underlying field theory. This production
channel can generate a substantial quantity of relic axions, which has implications for axion properties and for understanding of dark matter.

5.3 Collider Phenomenology

An aesthetically appealing possibility is that both dark matter and ordinary matter might have emerged from thesame process in the early universe. It is remarkable that the amounts of these two components are not very different: they are within one order of magnitude of each other, which would have to be regarded as fortuitous if theyarise from unrelated processes. Kawasaki and collaborators have proposed a scenario in which axino dark matter
arises from decays of supersymmetric Q-balls. In a separate paper, Kasuya and Kawasaki studied gravitino dark
matter produced in Q-ball decays.

Biplob Bhattacherjee

Dark matter may also be related to neutrinos. Neutrino masses are most elegantly explained by the famous seesaw mechanism, which employs right-handed counterparts of the usual left-handed neutrinos. If one of the righthanded neutrinos has a small Majorana mass, which is natural in the split seesaw and in some other models, thenthe resulting low-mass sterile neutrino can play the role of dark matter. Kusenko and Loewenstein have continued
the search for dark matter in the form of sterile neutrinos using dedicated observations on X-ray telescopes. They
have published new limits based on observations of dwarf spheroidal galaxies.

Alexander Kusenko

The largest supermassive black holes, with masses of hundred million solar masses and beyond, are the most powerful sources of radiation in the universe. These giant black holes absorb gas and stellar matter in the centers ofactive galaxies, spewing very high energy gamma rays and cosmic rays, which are accelerated in their powerful
jets. TeV gamma rays cannot travel large distances because they lose energy in interactions with starlight and infrared light re-emitted by dust. Yet, some very energetic gamma rays have been observed from some very distantobjects. This created a puzzle. Lorentz invariance violation, as well as the existence of axion-like particles mixed
with the photon, have been considered as possible explanations. However, Kusenko and collaborators showed thatthe observed spectra, as well as their relatively mild dependence on the red shift, can be explained by the secondary gamma-rays, which did not originate at the source, but were produced in the cosmic ray interactions along theline of sight. This interpretation paves the way for measuring magnetic fields deep in the voids between galaxies,
where the primordial seed fields may have existed from the time of Big Bang. Furthermore, one can measure correctly the extragalactic background light, which reveals the history of star formation in the universe.

Minxing Huang
Masahiro Ibe
John Kehayias
Research Program

Supermassive Black Holes Then and Now
Supermassive black holes exist in the centers of galaxies, including Milky Way, but there is no compelling theoryof their formation. Evolution of massive stars can produce black holes with masses of the order of a few solar
masses, but the origin of million-solar-mass black holes remains a mystery. Furthermore, observations of quasars imply that such objects have already existed at some very high red shifts, suggesting the possibility of theirprimordial origin. Observational evidence points to a population of black holes with a narrow mass distribution
around 105solar masses at early times, from which the observed distribution of masses could emerge via mergers
and accretion. Kawasaki, Kusenko, and Yanagida have described a plausible scenario for the primordial origin of
supermassive black holes. Cosmological inflation occurs when the energy density is dominated by a scalar field,
slowly moving in a relatively flat potential. Theories beyond the standard model predict a plethora of such scalar
fields, and the inflaton can follow a non-trivial path in the labyrinth of flat directions. Therefore, a two-stage or
multi-stage inflation can be a generic feature of supersymmetry and string theory. When the inflaton switches between these directions, the spectrum of density perturbations can acquire a feature that can give rise to primordial
black holes. The latest event of this kind could have produced a narrow spectrum of black holes with the requisitecharacteristic mass of 105 solar masses, thus explaining the origin of supermassive black holes.

Brian Feldstein

Sourav Mandal
Shigeki Matsumoto
Mihoko Nojiri
Serguey Petcov
Matthew Sudano
Kohsaku Tobioka

Collider phenomenology is now one of the most important research programs in particle physics because the
CERN Large Hadron Collider (LHC) experiment has been running since autumn 2009. In fact, the LHC experiment has been providing many precious data on the studies of the standard model (SM) and physics beyond
the SM, and those are being used to test various models of particle physics. The members of IPMU collider
phenomenology group have therefore great opportunities in exploring these physics, and pursue a broad rangeof research.
The LHC experiment enables us to systematically investigate the electroweak symmetry breaking, to study
quantum chromodynamics (QCD), and to probe new physics beyond the SM. Among several researches of collider phenomenology, the most of the members in the group are studying physics beyond the SM such as• Low energy supersymmetry,• Composite Higgs (Little Higgs, etc.),• Extra-dimensions at low energy-scale,• Other unexpected exotics.

The LHC experiment is currently suggesting the existence of the higgs boson at about 125GeV, while no new
physics signals are discovered yet. These results are (and will be) used to have a deep understanding of physics
beyond the SM at the TeV energy-scale.
It is also worth emphasizing that the study of the collider phenomenology at the IPMU has several advantages,
because the study is directly and indirectly influenced by other research programs. Connections between the
study of collider phenomenology and those of model buildings of particle physics, dark matter searches, andcosmology are particularly of importance. As already mentioned in this report of other research-programs,
IPMU has many active researchers working on these topics. It is thus possible for the members of the group to
efficiently perform their studies.
In addition to collider phenomenology at the LHC experiment, some of the members are also studying thoseat other collider experiments which are planned in near future. They are especially interested in the studies ofphysics beyond the SM at High Luminosity-LHC (HL-LHC) experiment and future linear collider experiments
such as the International Linear Collider (ILC) and Compact Linear Collider (CLIC).

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IPMU Annual Report 201119

5.5 Dark Matter Experiment

Andrea Ferrara

Atsushi Nishizawa

Atsushi Taruya

Patrick Decowski

Masayuki Nakahata

Tsz Yan Lam

Yasunori Nomura

Edwin Turner

Karsten Heeger

Anreas Piepke

Alexie Leauthaud

Masamune Oguri

Marcus WernerAlexander Kozlov

Yoichiro Suzuki

Brice Menard

Masato Shirasaki

Jun’ichi Yokoyama

Jing Liu

Yasuo Takeuchi

Hironao Miyatake

Charles Steinhardt

Naoki Yoshida

Kai Martens

Takahiro Nishimichi

Masahiro Takada

The size of data set in cosmological observations is huge. For example, the Sloan Digital Sky Survey-III(SDSS-III) creates a color image of more than a trillion pixels. That is so big and detailed that one would need
500,000 high-definition TVs to view it at its full resolution. This trend will continue at even faster rates aslarger telescopes become available in near future. For handling these massive data set and extracting maximum
amount of information, we must keep developing more and more sophisticated statistical methods. Relevant
issues that are actively pursued are selecting models, methods of estimating parameters, Bayes’ theorem andother statistical techniques.

Research Program

5.4 Cosmology and Statistics

A 23% of all there is in the
Universe is what we call Dark
Matter. Dark because unlike
nor mal matter (4% of all
there is) it does not interact
with light. So we cannot see itwith our telescopes, although
we can clearly see its imprint
on the distribution and movement of the visible stars andgalaxies through gravitational
forces among them. But whilein this way we can even map
its distribution throughout theaccessible history of our universe, we have no clear hints
yet as to its true nature.
One possibility is that Dark
Matter takes part in the weakinteraction of particle physics.
As this particular possibility is very attractive also from the point of view of particle theory, it has given rise toa variety of dedicated experiments around the world. WIMP has become the shorthand for this type of Dark
Matter: Weakly Interacting Massive Particle.

In the study of gravitational lensing which is actively carried out at IPMU, as an example, we try to extract tiny
distortion of the observed image of a galaxy from its true shape. We do so by modeling the galaxy shape in amathematically rigorous manner and convolving the sampling effects and noise in the observation. This type ofdata analysis requires close collaboration between cosmologists and statisticians.

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IPMU Annual Report 2011

IPMU is involved in this effort through the XMASS experiment at its Kamioka branch. In the XMASS detector
one metric ton of xenon is kept as a liquid at -100 Celsius. The dense liquid provides both a large target mass at its
center as well as shielding against radioactive backgrounds. Fast neutrons from the surrounding rock are moderated and remaining muons tagged in an 800 ton active water shield in which the detector is immersed.
Since the detector was first filled in late 2010 operational parameters were optimized in various commissioning runs. With this program concluding and a new Flash-ADC based data taking system being commissioned inspring 2012 the experiment is expected to start taking high quality physics data in 2012. Soon thereafter we expect to become the world’s most sensitive detector for WIMPs. With data from our commissioning phase we may
already being commissioned in spring 2012, the experiment starts taking high quality physics data in 2012.

IPMU Annual Report 201121

5.6 Detector Developments

5.7 Inflation and Early Universe

Sanshiro Enomoto

Kai Martens

Brian Feldstein

Alexander Kusenko

Masahiro Takada

Karsten Heeger

Andreas Piepke

Emir Gumrukcuoglu

Chunshan Lin

Taizan Watari

Glenn Horton-Smith

Ryutaro Takahashi

Masahiro Ibe

Shinji Mukohyama

Tsutomu Yanagida

Ken-iti Izawa

Yasuo Takeuchi

Masahiro Kawasaki

Yasunori Nomura

Jun’ichi Yokoyama

Jing Liu

Mark Vagins

John Kehayias

Charles Steinhardt

Experimental physics and observational astronomy rely on cutting-edge technologies to build detectors thatpush the frontier of knowledge with the data they deliver. Data is the life blood of science, as the scientificmethod demands that every insight be tested against the hard evidence of experimental data. The art of experimentation is to provide both reliable and pertinent data to test the theories that the disciplined use of knowledge and imagination conjure from the massive body of scientific data already accumulated.
Active detector development provides the means to extend the reach of current and future experiments, andvery possibly new technology that may well find its way back into your living room or workshop. It is a vital ingredient in ourquest to understand the Universe. The projects below are as diverse as the problems encounteredand the individuals working on them.

The Universe is expanding; the further away a galaxy is, the faster it is moving, which is known as the Hubble’s
law. This observational fact implies that, if we go back in time, the Universe was small, dense and extremely
hot. The evolution of the early universe is described by the Friedmann-Lemaitre-Robertson-Walker (FLRW)
universe, a homogeneous and isotropic solution of the Einstein equations of the general relativity, and the standard big bang theory is based on the FLRW universe. The Hubble’s law, the big bang nucleosynthesis (BBN),
the comic microwave background (CMB) radiation provide key support or the standard big bang theory. Those
three observations still remain important probes of the early Universe.

Research Program

Alexander Kozlov

Despite its great success the big bang theory is plagued with serious theoretical issues such as the horizon problem, the flatness problem, and the monopole problem. Those problems are beautifully solved by the introducing
an inflationary expansion at the very early stage of the Universe. What is more important about inflation is thatquantum fluctuations of a scalar field driving the inflation (called an inflaton) generate tiny density perturbations, which can account for the seed of the structures such as galaxies and clusters of the galaxies seen in thecurrent Universe. The properties of the density perturbations depend on the inflation models, which can beprobed by studying tiny inhomogeneities in the CMB temperature anisotropy.

EGADS Project (Evaluating Gadolinium’s Action on Detector Systems), which is now under construction in the Kamioka mine, will be used to establish the viability of gadolinium enhanced water Cheren-

Credit: NASA/WMAP Science Team

kov detector for detecting supernova relic neutrinos.

The recent progress in observational techniques has enabled us to study the evolution of the early universe with
unprecedented precision, and our understanding of the Universe has significantly increased. Nevertheless it is
not fully known how the inflation occurred, how the universe was reheated after inflation, how the dark matteras well as the baryon asymmetry were created, whether there is large non-Gaussianity in the density perturbations or not, and so on. We would like to tackle those questions in order to reveal how the universe evolved
from the inflationary epoch into what it looks like at present.

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IPMU Annual Report 201123

Tomoyuki Abe

Toshitake Kohno

Akihiro Tsuchiya

Alexey Bondal

Satoshi Kondo

Yukinobu Toda

Scott Carnahan

Siu Cheong Lau

Valentin Tonita

Richard Eager

Changzheng Li

Kouta Usui

Sergey Galkin

Todor Milanov

Misha Verbitsky

Kentaro Hori

Hirosi Ooguri

Marcus WernerAlexander Getmanenko

Kyoji Saito

Simon Wood

Yasuyuki Kawahigashi

Christian Schnell

Toshiyuki Kobayashi

Yuji Tachikawa

One can say that the history of mathematics is more or less equivalent to the history of mankind attacking
problems in reason or knowledge. Mathematics abstracts the truth behind generalities. It began as a useful
tool in everyday physics in the sense that we count numbers, we measure length and volume. Then as seen in
Euclidean geometry of Euclid or in the problem of determining the existence or non-existence of roots in algebraic equations, the practical side became lost and mathematics becomes pure pursuit of knowledge of humankind. Diophantine equations, Fermat’s lifework, do not affect our life at all whether they had integral solutions
or not.
In the 17th century, Newton found differential and integral calculus, giving a language and method to describe
the law of dynamics in nature, so then mathematics encountered physics. This is a good example of mathematics providing the scientific community, and sometimes society in general, with a common language andmethod to describe phenomena in their study. This in turn helps to establish mathematician’s original concepts.
Particularly in recent years the interaction between mathematics and physics has been in full flow.
This interaction is more important than ever, and mathematics of the 20th century developed through an enormous influence from physics. Gauge theory, quantum field theory, general relativity, and superstring theory inphysics have provided major impetus in the field of mathematics such as algebraic geometry, differential geometry, topology, representation theory, algebraic analysis and number theory.
Although the influence is great, mathematicians have been and will be working on those problems in mathematics which arose and to be solved purely within mathematics. A prominent recent example is the resolution
of Fermat’s last theorem. Notably, there exist examples where those tools developed purely mathematicallyhave interesting applications in physics.
IPMU is a very exceptional research environment for mathematicians, in that there always are physicists
nearby. The mathematicians at IPMU are to develop both physics and mathematics through much discussions
with the physicists. However, the emphasis is on that the true interest of mathematics is in mathematics, so theresearchers undertake their research with their top priority in the field of mathematics.

Research Program

5.8 Mathematics

Geometry:
Geometry is a collection of branches of mathematics, which studies mathematically defined geometric objects. For instance, geometric objects include topological spaces, differentiable manifolds, Riemannian manifolds, symplectic manifolds, complex manifolds and algebraic varieties. These are not only geometric figures
but also have important mathematical structures, which make the theories behind them very rich. Also thegeometry plays an important role in describing our universe, and has contributed much to physics. For instance, Riemannian geometry is necessary in developing Einstein’s theory of general relativity. On the other
hand, by the influence of string theory, it has been found recently that there are deep connections among
these geometric theories. The most significant example is the mirror symmetry, which predicts a duality
between symplectic manifolds and algebraic varieties. These have been developed as different mathematicalfields, but are now expected to be equivalent by the duality between the two different types of string theories.
The mirror symmetry is one of the themes of the study of geometry at IPMU.
In the theory of mirror symmetry, a Calabi-Yau 3-fold plays an important role. It is an algebraic manifold ofcomplex dimension three (real dimension six), with a Ricci flat metric. In string theory, our universe is considered to be 10 dimensional, and a Calabi-Yau 3-fold appears as an extra six dimensional space. The mirror
symmetry predicts an equivalence between period integrals on a Calabi-Yau 3-fold and a curve counting
theory (Gromov-Witten theory) on its mirror manifold. In IPMU, there are specialists in each side, and themirror symmetry is studied vigorously. K. Saito has studied the theory of periods for a long time, and foundthe notion of Frobenius structures on the deformation spaces of the singularities. This Frobenius structure is
now an essential tool in describing the mirror symmetry. T. Milanov is an expert in Gromov-Witten theory,and studies the Frobenius structures determined by Gromov-Witten invariants.
Another way to describe the mirror symmetry is to use the homological algebra. This was proposed by Kontsevich in 1994, and it is formulated as an equivalence between the derived category of coherent sheaves on
a Calabi-Yau 3-fold and the derived Fukaya category on its mirror manifold. A. Bondal is a leading expert
in derived categories of coherent sheaves, and invented the notions of exceptional collections, enhancementof the derived category. These notions are now essential in the study of derived categories. Y. Toda studies
stability conditions on derived categories, and Donaldson-Thomas type invariants counting stable objects inthe derived categories. This corresponds to “BPS state counting” in string theory, and an interesting researchsubject also in string theory.
The study of the geometry in IPMU does not restrict to the mirror symmetry, and the geometry is studied
from various viewpoint. T. Kobayashi studies the action of discrete groups on non-Riemannian homogeneous
spaces, and develops an original theory from a new geometric viewpoint. He discovered that local rigidity

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IPMU Annual Report 201125

Algebra:
Algebra was originally the field of mathematics that studied numbers and equations. In fact, in the Middle
Ages, a central problem in algebra was solving algebraic equations of higher degrees. In the 19th century,
Évariste Galois discovered a symmetry hidden in such equations, which led to the invention of the notion of agroup. After this discovery, the focus of the field of algebra shifted to understanding deep hidden structures.
Homological algebra is one such example. Homological algebra stems from geometry and was originally a way
to count the number of holes of, say, doughnuts. Once geometric notions are abstracted to homological algebra, many new invariants which do not necessarily have an obvious geometric interpretation appear naturally.
Derived categories are one such example. Derived categories were originally invented as a tool for efficiently
computing (co) homologies, but today they are considered interesting in their own right. Mathematicians at
the IPMU are pursuing a number of interests in the field of derived categories. For example, one question ofinterest is how much information on a given variety the derived category of coherent sheaves over that variety
possesses. This question is currently—with the relation to mirror symmetry in mind being actively studied by
A. Bondal and Y. Toda, as was written in Geometry section above. We are also trying to construct additionalframeworks, such as differential graded algebra for example, to encode more information on a variety by enhancing the structures on its derived category or its abstraction, the triangulated category.

5.9 Models beyond the Standard Model

Biplob Bhattacherjee

Ayuki Kamada

Serguey Petcov

Brian Feldstein

John Kehayias

Charles Steinhardt

Emir Gumrukcuoglu

Alexander Kusenko

Matthew Sudano

Junji Hisano

Sourav Mandal

Kohsaku Tobioka

Masahiro Ibe

Shigeki Matsumoto

Taizan Watari

Koji Ichikawa

Shinji Mukohyama

Yin Wen

Ken-iti Izawa

Yasunori Nomura

Tsutomu Yanagida

Up to now, we have seen that a quantum field theory with quarks, leptons and vector bosons for three different
forces describes reasonably well all the experimental data available so far. Among the vector bosons, however,those corresponding to the weak force (which is responsible for the β-decay of nucleons) are known to havemasses. There are three such vector bosons, and they are called W +, W − and Z bosons, or weak bosons, as awhole. From the consistency of quantum field theories, it is known that something must be behind the nonzero
masses of these vector bosons. It has not been confirmed experimentally yet how these masses are generated.

Research Program

may fail even in higher dimensions for indefinite-Riemannian symmetric spaces, and is challenging to develop
spectral theory in connection with their deformation theory. Also T. Kohno studies quantum invariants on low
dimensional manifolds, which are related to integrable systems and the conformal field theory. He revealed aquantum group symmetry for homological representations of braid groups and described the image of quantum representations of mapping class groups. In this way, there are various studies of the geometry at IPMU,
and we aim to have a further breakthrough by combining these studies.

Neutrino Mass

Another field of interest is groups or group actions. Groups were originally a language for describing symmetries behind solutions of equations, but nowadays, they are an indispensable tool not only in mathematics but
also in many areas of physics such as crystallography or gauge theory. Often, groups are studied through theirrepresentation theory. K. Saito considers sets of vanishing cycles coming from geometry as a generalization ofroot systems, and applies the corresponding theory of infinite dimensional Lie algebras and its representations
to geometry. In T. Kobayashi’s new theory of global analysis for minimal representation and visible action oncomplex varieties, which are his recent themes, group appear as “leit motiv”, and the theory is expanded in away special cases are connected to infinite dimensional representation theory. A. Tsuchiya studies the algebraic structures of logarithmic conformal field theory such as the representation theory of the chiral algebra andconformal blocks. T. Kohno studies monodromy representations of braid groups appearing in conformal field
theory from the point of view of hypergeometric integrals.
Some researchers at the IPMU also study equations, one of the original goals of algebra. One of the ultimate
goals of modern arithmetic is a framework called the Langlands program, which predicts that two seemingly
completely different looking sets of representations coming from arithmetic coincide in a natural sense. This
vast conjecture includes even Fermat’s last theorem as a very small part. It is therefore not surprising that thisprogram is thought to be very difficult to realize, however a number of simpler variants exist. S. Kondo and T.
Abe are working on the local Langlands program and the Langlands program for function fields for example.
Yet another variant of the Langlands program, for which a connection to S-duality in physics has been observed, is the geometric Langlands program. The Langlands program and its variants have therefore become
very active and important modern topics of research.
As one can see, we study many branches of algebra here at the IPMU. Algebra may not necessarily directly
deal with understanding the universe and moreover most of the algebraists at the IPMU are interested inmathematics in and of itself, not in its application to other fields. However, when the efforts of practitionersof different disciplines align, the benefit to all fields involved is huge. Our daily efforts in understanding thestructures ubiquitous to mathematics feed directly into efforts directed at understanding the most fundamental
phenomena of nature. We therefore await the next great breakthrough rivaling Galois’ discovery of groups.

Initial Condition of
Big Bang Universe

Small Parameters of the SM

Flavor Structure

Supersymmetry
Extra Dimension
Pseudo NG Higgs

Axion, Inflaton, Curvaton
Dark Energy, Dark Matter

Cosmic Ray Flux

Naturalness of EW / Planck
Electroweak Symmetry Breaking

Deviation from the SM
Experimental Deviations

Standard Model

Technicolor

What is called the Standard Model provides a simple theoretical idea how the weak bosons acquire masses.
According to the Standard Model, the masses originate from condensation of quanta of a new scalar boson,
called Higgs boson. The Higgs boson is the last missing piece of the Standard Model, and will be discovered inexperiments in near future, if the weak bosons have masses through the mechanism predicted by the Standard
Model. Is that the end of the story? Maybe ..., but maybe not. Let us think about the following questions.
•T he Higgs boson is the only scalar field in the Standard Model; all other dynamical degrees of freedom in theStandard Model are either fermions or vector fields. Why does the Standard Model have one scalar field, andjust one? Why does its condensation develop?

√•T he Newton constant G N ≃ 6.7×10 −11m3 kg/s2 corresponds to an energy scale 1/ GN ℏ /c3 〜 1019 GeV. Whyis there a huge hierarchy of order 1017 between this energy scale and the weak boson masses of order 102 GeV,
and how can the weak boson masses remain so small under quantum corrections?
In order to solve these questions theoretically, various models beyond the Standard Model have been constructed so far, and we still continue to do so in quest of a better solution to these problems. Once we have concrete

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The origin of the masses of the weak bosons is not the only puzzle of the Standard Model. It is known thathuge fraction of the universe consists of dark matter and dark energy. It is very unlikely that dark matter is actually the ordinary matter particles in the Standard Model. This is where we find another motivation to extend
the Standard Model. Our universe may have become so large because of an inflationary process in the early
universe, and quantum fluctuations of a scalar field may become the fluctuations of density in the early universe, which eventually become galaxies and clusters of galaxies. So, here is another motivation to introduce
a new degree of freedom and extend the Standard Model. Such cosmological issues as inflation, primordial
density perturbations and dark matter motivate extensions of the Standard Model, and models in quantum field
theories are the appropriate framework in order to work on these issues.
Recent reports of excess in high-energy cosmic ray fluxes, deviation from the Standard-Model prediction of
the anomalous magnetic moment of muon, and some other reports of deviations from the Standard Model predictions may also be indications of some physics beyond the Standard Model. We therefore seek for theoreticalmodels that account for these phenomena.

5.10 Neutrino Physics

Patrick Decowski

Jing Liu

Kate Scholberg

Sanshiro Enomoto

Sourav Mandal

Henry Sobel

Brian Feldstein

Kai Martens

James Stone

Karsten Heeger

Shinji Mukohyama

Masahiro Takada

Junji Hisano

Masayuki Nakahata

Yasuo Takeuchi

Glenn Horton-Smith

Tsuyoshi Nakaya

Mark Vagins

Takaaki Kajita

Christian Otto

Christopher Walter

Alexander Kozlov

Serguey Petcov

Tsutomu Yanagida

Alexander Kusenko

Anreas Piepke

We also address the following problems. The Standard Model is described by a quantum field theory with
about 30 parameters, and the values of these parameters can be determined only by measuring them experimentally. Would it be possible to determine them theoretically, by considering theoretical frameworks that
contain the Standard Model?

Research Program

models, we can examine whether such models are really consistent with all the available experimental data,
predict what kind of signals can be expected in future experiments, and even propose experiments to confirm
such models.

The thermal history of early universe is described very well by the Standard Model at least back to the erawith the temperature of order MeV, but it is only with several input parameter values of initial condition of theuniverse. Those initial condition parameters include baryon asymmetry, normalization of density contrast andthe amount of dark energy. How are these initial condition parameters set? Once again, it is impossible to think
about such problems without a model that extends the Standard Model.

For non-experts
After kB, c and ℏ are set to unity, [length] = [energy] −1 is the only dimension left in physics. The fundamental law of physics in nature has been probed down to the length scale of order 10 −3 fm = 10 −8 Å, whichis equivalent to the energy scale of order 102 GeV = 1011 eV. Nothing is known for sure yet, however, what
is happening at even shorter distance scales.

What are the building blocks of nature? Most people have heard of electrons, which are indeed (as far as we
can tell) fundamental particles, as well as protons and neutrons, which are themselves composite objects composed of much smaller fundamental particles called quarks. But there are much more unusual fundamental
particles, too, and perhaps the most mysterious of these are the neutrinos.
The Standard Model of particle physics contains three generations of fundamental particles. In each of thesegenerations, or families, there are two quarks and two much less massive particles called leptons. In the first
family one such lepton is the electron, which carries an electric charge, and the other first-generation lepton iscalled the electron neutrino, which is electrically neutral. The second generation contains two more types ofquarks, a charged lepton called the muon, and the muon neutrino, while the third family contains a final pairof quarks, a charged lepton called the tau, and a tau neutrino.

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The Super-Kamiokande [Super-K] detector is a 50,000 ton tank of water buried deep under the Japanese Alps.
By studying neutrinos generated by cosmic ray interactions in the Earth’s atmosphere, in 1998 Super-K madethe stunning discovery that different types of neutrinos can spontaneously transform from one type to another,a process known as neutrino oscillation. This also implied that at least two of the three neutrinos have a small,but non-zero mass, something not predicted by the Standard Model. This was the first time since its inceptionthat the Standard Model needed to be revised based on solid experimental data. In 2001 Super-K made a crucial contribution to the solution of the solar neutrino problem by indicating that solar neutrinos produced by the
Boron-8 reaction in the Sun could change their flavor while in flight, and uniquely selected the large mixing
angle solution to the problem. IPMU members are now working on GADZOOKS!, an initiative to enrich theultrapure water inside Super-Kamiokande with the element gadolinium. This will greatly reduce backgrounds
and, among many other physics benefits, should allow the first-ever detection of a constant stream of neutrinos
from distant supernovas.
The KamLAND neutrino detector is located in the same ancient zinc mine as Super-Kamiokande, but insteadof water it is filled with 1,000 tons of liquid scintillator. This makes it very sensitive, especially to low energy
neutrinos from nuclear reactors and those generated by radioactive decays within the Earth itself. In 2002
KamLAND was the first experiment to observe disappearance of reactor neutrinos, which matched other experiments’ solar neutrino data in spectacular fashion. After lowering the energy threshold at which their data
could be analyzed, in 2005 KamLAND was the first experiment to detect geoneutrinos, ushering in an entirely
new way to study the Earth’s interior. Also in 2005, KamLAND saw evidence of spectral distortions in the reactor neutrino signal; clear proof of neutrino oscillations. IPMU members are currently working on modifying
KamLAND to detect very low energy solar neutrinos produced by the Beryllium-7 reaction in the Sun, as wellas transforming the KamLAND detector into a huge neutrinoless double beta decay experiment via the addition of Xenon-136 to the detector volume.
As we continue to understand the mysterious neutrinos, as well as the varied processes which produce themwithin the Earth, upon the Earth, above the Earth, within the Sun, and inside exploding stars, IPMU researchers are using these tiniest of particles to probe the most inaccessible places and farthest reaches of the universe
itself.

5.11 Observational Cosmology

Kevin Bundy

Masamune Oguri

Andrea Ferrar

Masami Ouchi

Gaston Folatelli

Robert Quimby

Tsz Yan Lam

Tomoki Saito

Alexie Leauthaud

Masato Shirasaki

Keiichi Maeda

Malte Schramm

Brice Menard

John Silverman

Sogo Mineo

Charles Steinhardt

Hironao Miyatake

Hajime Sugai

Shinji Mukohyama

Masahiro Takada

Kimihiko Nakajima

Masayuki Tanaka

Takahiro Nishimichi

Atsushi Taruya

Atsushi Nishizawa

Edwin Turner

Ken’ichi Nomoto

Naoki Yoshida

Research Program

The three types of neutrinos, the electron neutrino, the muon neutrino, and the tau neutrino, are exceedingly
challenging to study, because they hardly interact with matter at all. That means neutrino detectors need to bevery big, very sensitive, or both. At IPMU we have teams of researchers working on some of the best and most
famous neutrino detectors in the world.

Takaya Nozawa

Understanding the nature and origin of large-scale structure in the Universe is one of most compelling issues
in observational cosmology. The currently most conventional scenario is given by the cold dark matter (CDM)
dominated model, where gravitational instability mainly driven by spatial inhomogeneities of CDM distribution amplifies the seed density perturbations to form the present-day hierarchical structures. Therefore revealing distribution and amount of CDM is crucial to understanding the formation of large-scale structure. In addition the presence of dark energy drives the accelerating cosmic expansion, and therefore affects the growth ofstructure formation. The dark matter distribution and the nature of dark energy can be explored from massive
galaxy surveys.
We have been actively working both on the measurements using currently available telescope facilities and on
the planning of future instruments. The two powerful investigative tools are the gravitational lensing effect andthe baryon acoustic oscillation.
Gravitational lensing effect:
The path of light ray emitted by a distant galaxy is bent by gravitational force of intervening large-scale structure during the propagation, causing the image to be distorted—the so-called weak lensing shear. Conversely,
measuring the coherent shear signals between galaxy images allows us to reconstruct the distribution of invisible dark matter. Moreover, since the weak lensing shear deals with the light propagation on cosmologicaldistance scales, the lensing strengths depend on the cosmic expansion history that is sensitive to the nature ofdark energy. Thus weak lensing based observables offer a powerful way for studying the nature of invisible
components, dark matter and dark energy. We are carrying out observational and theoretical studies of weaklensing phenomena using our own Subaru data sets as well as simulations of large-scale structure.
Baryon acoustic oscillation:
To measure properties of dark energy, one needs to measure the expansion history of the Universe precisely.
Because light travels at a finite speed, one can measure the expansion rate of the past by looking far. Comparing the expansion rate at varying distances would reveal the expansion history. The expansion itself is relatively
easy to measure. The light emitted by a distant galaxy is stretched by the expansion of space and becomes redder, which can be measured by any decent spectrograph.

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Hyper Suprime Camera (HSC):The HSC, currently under construction, is the project to replace the prime focus camera of Subaru Telescope(8.2 meter optical-infrared telescope at the summit of 4,200 m-Mauna Kea, Hawaii) with a new camera thathas wider field-of-view than the current one by a factor of 10. Fully utilizing the unique capabilities of HSC, its
survey speed and excellent image quality, we are planning and designing a massive galaxy survey that covers
an area of a few thousands square degrees and reaches to the depth to probe the Universe up to red shifts of afew. In fact these data sets will provide us ideal data sets for exploring the nature of dark matter and dark energy via measurements of cosmological observables available from the data, weak lensing and galaxy clustering statistics. We, IPMU members, are actively involved in this HSC project, and working on the designing andplanning of HSC galaxy survey and development of data analysis pipeline.
Sloan Digital Sky Survey III:In January 2011, the SDSS-III collaboration released the largest digital color image of the sky ever made. The
image has been put together over the last decade from millions of 2.8-megapixelimages taken at the 2.5-metertelescope at the Apache Point Observatory in New Mexico, thus creating a color image of more than a trillion
pixels. This new SDSS-III data release, along with the previous SDSS-I and SDSS-II data releases that it builds
upon, gives astronomers the most comprehensive view of the night sky ever made. SDSS data have alreadybeen used to discover nearly half a billion astronomical objects, including asteroids, stars, galaxies and distantquasars.
IPMU has been a part of the SDSS-III and involved in the study of these rich images. But our focus has been
to conduct a new survey to a deeper universe with the improved spectrograph. This survey, the Baryon Oscillation Spectroscopic Survey (BOSS), maps the spatial distribution of luminous galaxies and quasars to detect thecharacteristic scale imprinted by baryon acoustic oscillations in the early universe. Using the acoustic scale as astandard ruler, we can infer the angular diameter distance to the galaxy red shift. The BOSS has started to takedata in 2009 and will continue until 2014. Its goal is to precisely measure how Dark Energy has changed over
the recent history of the Universe.
PrimeFocusSpectrograph (PFS):The PFS project that mounts a next generation spectrograph on the Subaru telescope and is planned to startdata taking later this decade was overwhelmingly endorsed at the Subaru Users meeting of January 2011. Usinga wide angle view of Subaru telescope and the PFS, we can study several thousand galaxies at the same timeand use the baryon acoustic oscillation technique.
In addition to BAO, there are a number of other measurements to constrain the properties of dark energy using
this instrument. Furthermore, this type of spectrograph with a large field of view and a massive multi-object
capability will be unique among the largest telescopes in the world, allowing for unprecedented studies of formation and evolution of galaxies, as well as the assembly history of our own Milky Way Galaxy.
The strength of this project comes from exploiting the data using HyperSuprimeCam (HSC), a 3-tonne digital
camera with 900 million pixels, slated for the first light in 2012. The combination of imaging using HSC andspectroscopy using PFS on Subaru is dubbed SuMIRe, Subaru Measurement of Images and Red shifts. The
SuMIRe project is expected to repeat and exceed the tremendous success of Sloan Digital Sky Survey (SDSS),
but with a much deeper view of the Universe back to the era that formed early stars and supermassive blackholes.

5.12 Proton Decay

Takaaki Kajita
Alexander Kozlov
Yasunori Nomura
Kate Scholberg
Henry Sobel
James Stone
Research Program

To measure the expansion history, however, we also need to know how far back in time the light was emitted
from the galaxy, or equivalently, how far away it is. Measuring precise distances in cosmological scales is very
challenging. Clustering of baryonic matter at a certain characteristic scale that is imprinted by baryon acoustic
oscillation (BAO), or propagation of acoustic waves, in the early universe serves as a “standard ruler” for cosmological observations. This technique requires to study millions of galaxies in a wide field of view, and map
the spatial distribution of luminous galaxies to detect the characteristic scale.

Yoichiro Suzuki
Yasuo Takeuchi
Mark Vagins
Christopher Walter

The stability of the proton represents one of the greatest theoretical and experimental challenges in particle
physics today. In most grand unified theories, particularly those with a TeV intermediate mass scale, the proton “wants” to decay. Experimentally, however, the proton seems determined to outlive us all. Beginning withthe first large-scale searches in the 1980’s, one promising theory after another has floundered on the shoals of
nucleon decay. To date, no hint of a nucleon decay signal has emerged.
In spite of this, the study of nucleon decay provides one of the few approaches to the problem of confronting grand unified theories with experimental data, and any progress toward this goal has unique value forthe future development of physics. This program has already been a success. The simplest unification model,
minimal SU(5), has been ruled out by the experimental results. Every subsequent grand unification theory willremain only a mathematical construct if further experimental information is not available.
The search for nucleon decay requires massive detectors. A search with a sensitivity of 1033 years, for example,
requires a detector with approximately 1033 nucleons. Since there are 6 × 1029 nucleons per ton of material, this
implies detectors of multi-kiloton scale.
The “classical” proton decay mode, p → e+π0, can be efficiently detected with low background. At present, thebest limit on this mode (τ/β> 1.21 × 1034 yr, 90% CL) comes from a 206 kton-yr exposure of Super-Kamiokande. The detection efficiency of 45% is dominated by final-state π0 absorption or charge-exchange in the
nucleus, and the expected background is 2 events/Mton-yr.
Supersymmetric theories favor the mode p → νK+, which is experimentally more difficult due to the unobservable neutrino. The present limit from Super-Kamiokande is the resultof combining several channels, themost sensitive of which is K+ → μ +ν accompanied by a de-excitation signature from the remnant 15N nucleus.
Monte Carlo studies suggest that this mode should remain background free for the foreseeable future. The
present combined limit isτ/β > 3.3 × 1033 yr (90% CL).
Recent theoretical work suggests that if supersymmetric SO(10) provides the framework for grand-unification,
the proton lifetime (into the favored νK + decay mode) must lie within about one order of magnitude of present limits. Similarly, SO(10) theories suggestτ/β(eπ0 ) ≈ 10 35 years—about a factor of ten beyond the present
limit. Thus, continued progress in the search for nucleon decay inevitably requires larger detectors.
Moreover, the enormous mass and exposure required to improve significantly on existing limits (and the unknowable prospects for positive detection) underline the importance of any future experiment’s ability to address other important physics questions while waiting for the proton to decay. Proton decay experiments havemade fundamental contributions to neutrino physics and particle astrophysics in the past, and any future experiment must be prepared to do the same.

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5.14 Structure Formation

Jyotirmoy Bhattacharya

Melina Bersten

Alexie Leauthaud

Masayuki Tanaka

Yu-Chieh Chung

Andrea Ferrara

Brice Menard

Takahiro Nishimichi

Richard Eager

Ayuki Kamada

Hironao Miyatake

Atsushi Nishizawa

Mitsutoshi Fujita

Tsz Yan Lam

Yu Nakayama

Ken’ichi Nomoto

Sergey Galkin

Masami Ouchi

Malte Schramm

Masamune Oguri

Simeon Hellerman

Tomoki Saito

John Silverman

Atsushi Taruya

Kentaro Hori

Ikko Shimizu

Charles Steinhardt

Edwin Turner

Minxin Huang

Masato Shirasaki

Masahiro Takada

Naoki Yoshida

John Kehayias
Johanna Knapp
Todor Milanov
Shinji Mukohyama
Hirosi Ooguri
Cornelius Schmidt-Colinet
Johannes Schmude

There are rich structures in the present-day universe, such as stars, galaxies, and large-scale structure. We
study how these objects are formed using large computer simulations and sophisticated theoretical models.

Research Program

5.13 String Theory

The standard Big Bang model posits that the universe was nearly homogeneous and very hot when it was born.
Tiny “ripples” in the distribution of matter were generated through a rapid expansion phase called inflation in
the very early universe. These primeval density fluctuations grew by the action of gravity, eventually forming
luminous objects such as galaxies.

Matthew Sudano
Shigeki Sugimoto

Cosmic Dark Age

Yuji Tachikawa
First 3

Tadashi Takayanagi

Present

IPMU Annual Report 2011

Earth Life

Galaxyntio34First Star

fla

Space and time do not exist beyond the Planck scale, and they should emerge from a more fundamental structure. Superstring theory is a leading candidate for a mathematical framework to describe physics at the Planckscale since it contains all the ingredients necessary to unify general relativity and quantum mechanics and to
deduce the Standard Model of particle physics. Superstring theory has helped us solve various mysteries ofquantum gravity such as the information paradox of black holes posed by Stephen Hawking. The theory has
given us insights into early universe cosmology and models beyond the Standard Model of particle physics. It
provides powerful tools to study many difficult problems in theoretical physics—often involving strongly interacting systems—such as QCD (theory of quark interactions), quantum liquid and quantum phase transitions. It
has also inspired many important developments in mathematics. All of these aspects of string theory are vigorously investigated at IPMU.

Black Hole

Transparent

In

In the past few hundred years, scientists have searched for fundamental laws of nature by exploring phenomena at shorter and shorter distances. Does this progression continue indefinitely? Surprisingly, there are reasons
to think that the hierarchical structure of nature will terminate at 10−35 meter, the so-called Planck length.
Let us perform a thought-experiment to explain why this might be the case. Physicists build particle colliders
to probe short distances. The more energy we use to collide particles, the shorter distances we can explore.
This has been the case so far. One may then ask: can we build a collider with energy so high that it can probe
distances shorter than the Planck length? The answer is no. When we collide particles with such high energy,
a black hole will form and its event horizon will conceal the entire interaction area. Stated in another way,
the measurement at this energy would perturb the geometry so much that the fabric of space and time would
be torn apart. This would prevent physicists from ever seeing what is happening at distances shorter than the
Planck length. This is a new kind of uncertainty principle. The Planck length is truly fundamental since it isthe distance where the hierarchical structure of nature will terminate.

Big Bang

Taizan Wataris

MinuteTime

Adapted from “Physics of the history of the universe” by Yasuo Fukui et al.

The energy content of the universe and basic statistic that describe the condition of the early universe havebeen determined with great accuracy from recent observations of cosmic microwave background radiation,
large-scale galaxy distribution and distant supernovae. Cosmology is now at a stage where theory can makesolid predictions, whereas a broad class of observations can be directly used to verify them. Planned large astronomical surveys such as Sloan Digital Sky Survey III and Subaru HyperSprime Cam Survey will provide
rich information on the nature of dark matter and dark energy. Accurate theoretical predictions are needed tomake the full use of the observational data.
Our primary interests are in primordial star formation in the early universe, the formation and evolution ofgalaxies, and the formation of large-scale structure. Results from these studies will be used for making goodplans and proposals for Subaru-HSC/PFS dark energy survey.

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5.15 Supernova

Melina Bersten
Andrea Ferrara
Gaston Folatelli
Raphael Hirschi
Alexander Kusenko
Research Program

Marcos Limongi
Keiichi Maeda
Kai Martens
Takashi Moriya
Ken’ichi Nomoto
Takaya Nozawa
Christian Ott
Robert Quimby
Kate Scholberg
Henry Sobel

Credit: Subaru telescope

James Stone
Yasuo Takeuchi
Mark Vagins
Naoki Yoshida
Supernovae are explosions of stars at the end of their lives. Core-collapse supernovae (Type II, Ib, and Ic) are
the outcome of the gravitational collapse of massive stars (i.e., more than ten times as massive as the Sun), followed by formation of a neutron star or a black hole, announced by a huge amount of neutrinos. Thermonuclear supernovae (Type Ia) are explosions driven by nuclear reactions within a white-dwarf star.
Supernovae provide natural laboratories for a range of physical processes, such as neutrino physics, some ofwhich cannot be addressed by experiments on the Earth. Furthermore, they are the main contributors of heavy
elements in the Universe; without them, baryons in the Universe would be only hydrogen, helium and someminor elements, although in reality the Universe is filled with about a hundred different sorts of elements.
Their energy produced at the explosions is huge, and supernova explosions could play important roles even information and evolution of galaxies. Finally, importance of understanding their natures is highlighted by theiruse as cosmological distance indicators, leading to the discovery of the Dark Energy.
Our understanding of the above issues is still far from satisfying, with various issues still under investigation.
At IPMU, we cover most of the topics related to supernovae both in theory and observation/experiment; evolution of stars toward supernovae, theory of explosions, attempt to detect these neutrinos at Kamioka, nucleosynthesis of elements up to iron and beyond, formation of dust grains, theory of optical emission from supernovae
and evaluation of their use as cosmological distance indicators, and observations using the Subaru telescopeincluding future large survey planning with the HSC. By unifying these attempts, we aim to comprehensively
understand supernovae and their influences on the evolution of the Universe.

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First Four and Half YearsThe IPMU aims to address the deepest and biggest questions about the nature of the
Universe: How it started, what it is made of, what its fate is, what laws govern it, andwhy we exist in it. In order to address such questions, we need a team that has varied
approaches yet working cohesively together. The team has to range from experimentalists andobservers who take the real data about the nature of the Universe, theoretical physicists andastrophysicists who interpret the data and make new predictions, those who build foundational
theories that inspire mathematics, and mathematicians who provide new frameworks for use
in theoretical physics. Since the launch of the IPMU, we have been assembling such a coherent
team with some significant fruits already produced by this stage. Given the progress in mounting the next-generation experiments and devising observational strategies, we anticipate evengreater output in the next few years.
To describe the progress and results to date, we use the categories based on traditional disciplines below. But we try to emphasize the cross-connections among them to demonstrate theemerging fusion among disciplines. Note that the selection of results described here is meant
to be examples, not exhaustive. Names of co-authors outside IPMU are not mentioned due tospace limitation.

The concept for the ZEN project was developed byAlexandre Kozlov in 2007. It utilizes the existing
KamLAND detector, which has 1kt of liquid scintillator with radio contaminants below 3.5×10 −18g/g
for uranium and 5.2×10 −17g/g for thorium. Using
this ultra-clean environment and decent energy
resolution, ZEN looks for the neutrinoless double
beta decay: a neutron inside a large nucleus decays
into a proton, electron, and anti-neutrino, where
the anti-neutrino transforms to a neutrino, and is

6.1 Experimental Physics

6.1.2

Experimental physics is the primary way to directly obtaining information about the nature of the
Universe. IPMU has been participating in two major experiments, the Super-Kamiokande and KamLAND experiments in the Kamioka observatory. Solar neutrino results were reported from bothphases SK-II (Phys. Rev. D 78, 032002 (2008)) and SK-III (Phys. Rev. D 83, 052010 (2011)) and confirmed the global picture of the solar neutrino physics in statistically and systematically independent
fashion. The SK-II result was particularly difficult because of the high energy threshold. KamLAND
clearly showed that neutrinos oscillate at more than 5 sigma confidence level (Phys. Rev. Lett. 100,
221803 (2008)), and provided the most accurate measurement of θ12, hinting at non-zero θ13 which
would be important for the future of the field (Phys. Rev. D 83, 052002 (2011)). These experiments
have been at mature stages and the IPMU has been contributing to the ongoing operations.

Most of the chemical elements we see around us
had been forged deep inside stars by nuclear fusion process, then were subsequently blown off
into the space by supernova explosions. Our Sun
is believed to be a third-generation star that wascomposed of such elements produced by the earlier generation of stars. Therefore, the history whenand how many supernova explosions occurred is
directly tied to the chemical evolution of the Universe, hence the question why we exist. The PI
Ken Nomoto has been one of the leading experts
in the theory of supernova explosions while hepointed out that we have not obtained the detailed
quantitative understanding of chemical abundanceof the Universe.

We are making progress in three major new initiatives, ZEN, EGADS, and XMASS. While no concrete results had been obtained yet by long-term efforts to start new experiments, substantial progress has been made on all three of them.

6.1.1

ZEN

The ZEN project is being put together to look
for a possible conversion of anti-matter (antineutrino) to matter (neutrino) in a very rare
process called neutrinoless double beta decay.
It was motivated by the celebrated results fromthe Super-Kamiokande experiment that discovered the extremely small but finite mass ofneutrinos in 1998, followed by the resolution of
the decades-long solar neutrino problem by the
KamLAND experiment in 2002. These results

38

cal role in reshuffling the amount of matter andanti-matter in the early universe, creating a small
excess matter at the level of one part in a billion,
leading to the atomic matter in the Universe today
after the rest of matter and anti-matter had annihilated into photons. This theory is called leptogenesis, pointed out by PI Tsutomu Yanagida that Majorana neutrinos naturally arise with tiny masses
in grand unified theories, and later together withanother PI Masataka Fukugita that neutrinos could
indeed explain the origin of atomic matter. If leptogenesis is true, neutrinos and anti-neutrinos cantransform to each other, addressing the question
why we exist in the Universe.

IPMU Annual Report 2011

showed that, in addition to the right-handed
anti-neutrinos discovered back in 1950s, there
must also be electrically neutral left-handed
ones. The question is whether such left-handed
ones are identical to left-handed neutrinos
which are also known to exist, or a completely
new variety of elementary particle not discovered to date. If the former case is true, called
Majorana neutrinos, there is no fundamental
distinction between matter and anti-matter.
Then the neutrinos could have played a criti-

re-absorbed by another neutron in the same nucleus, thereby emitting two electrons but no neutrinosin the nuclear transition. He pointed out that alarge amount of gaseous xenon can be dissolved
into the liquid scintillator, allowing for the search
for this rare process which may occur only oncein 1026 years. IPMU appointed Kozlov in 2008 as
a distinguished (long-term) postdoc, and he has
been leading the effort to convert the KamLAND
experiment into the new phase. The lead institution for the KamLAND experiment, ResearchCenter for Neutrino Science, is lead by the PI
Kunio Inoue who acquired necessary funding forthe first stage of the ZEN project in 2009. The datataking has start in 2011 and results were reported
from the first batch of data: precise measurementof ordinary double beta decay half-life and a limiton the neutrinoless double beta decay, and setting
the most stringent limit on the Majoron coupling
to the neutrino. Even though there are many ongoing experiments looking for a similar process
around the world, ZEN is expected to overtakethem quickly and produce the world’s best resultin the 2012–2013 time-frame. It has sensitivity to
the effective neutrino mass of 50 meV, eventually
improving to the 20 meV with a future upgrade.

Research Highlight

6 Research Highlight:

EGADS

While ZEN addresses the question why there
is atomic matter at all, EGADS tries to address
the question of chemical evolution by observing
supernovae at billions of light years away using
neutrinos. The Kamiokande experiment observed
about ten (anti-) neutrinos from the SN1987A in
the Large Magellanic Cloud and confirmed thebasic understanding of core collapse supernova,
leading to the Nobel prize to Masatoshi Koshiba.
The current Super-Kamiokande will be able todetect thousands of neutrinos if another supernova
explosion occurs in our Milky Way galaxy. However, study of chemical evolution requires obser-

vation of supernova neutrinos from cosmologicaldistances (billions of light years), and the current
detector does not have adequate sensitivity.
Mark Vagins, together with a theorist John Beacom in 2004, proposed to dump chemical compound of gadolinium into the ultra-pure water in
the Super-Kamiokande detector to enhance thesensitivity of detecting (anti-)neutrinos from the
distant supernovae. This is well known in thecommunity as the “GADZOOKS!” proposal. The
IPMU appointed Vagins in 2008 as a Professor
to kick-start this effort. Such a study will provide
complementary information to the direct observation of supernova using large telescopes, whichis the research led by Assistant Professor Keiichi
Maeda discussed below. Our PI Masayuki Nakahata and Vagins obtained funding of 133 million
yen from JSPS in 2009 to study the experimental
feasibility of this proposal. With this funding, they
constructed a new water tank inside the Kamioka
mine to study the impact of gadolinium on thetransparency and stability of water, which started
in 2011. The Super-Kamokande collaboration will
judge whether to dump gadolinium compound
based on the results from this R&D in the next few
years.

IPMU Annual Report 2011

39

XMASS

Beyond the origin of atomic matter studied by
ZEN and its chemical composition by EGADS,
they do not address more than 80% of matter in
the Universe called dark matter. Currently there isvery little empirical information about its nature
except for its gravitational influence on motion ofstars, galaxies, and light.
XMASS was conceived by our PI Yoichiro Suzuki in 2000, and funding was acquired in 2007.
Even though there was already an ongoing effort
at the Institute for Cosmic Ray Research, IPMU
naturally joined the effort to build the detector andanalyze the data. We appointed Associate Professor Kai Martens in 2008 with expertise in reducing the radon background in the liquid xenon, as
well as a very able postdoc Jing Liu.

The first generation of the experiment has one kiloton of liquid xenon surrounded by a hexagonal arrayof photomultiplier tubes, which is further suspended
inside a 5-kt water tank to shield external neutron
background. The tubes are specially fabricated tosatisfy the stringent cleanliness requirements. The
sphere had been assembled in October 2010, andthe commissioning started in November. The external background is suppressed by the water shieldwith veto counter as well as the fiducial volume cut
using the reconstructed vertex positions. The physics run started in 2011 and the first result becomes
available in 2012. Being the largest dedicated dark
matter detector in the world, it should provide competitive sensitivity to other competing experimentseven with a tight fiducial volume cut down to approximately 100 tons.

6.2 Observational Astronomy
The most direct way to study the Universe is by observing it with telescopes. There are two complementary
approaches, one is to perform a dedicated study of a particular type of astronomical objects, while the otheris to conduct a wide survey of the sky. They are not mutually exclusive and often a large survey does provide
a crucial catalog of a particular type of objects. Yet we discuss each approach separately for simplicity.

6.2.1

Wide-scale Surveys

To study the overall trend of the Universe, inparticular its expansion history driven by dark
matter and dark energy, we try to avoid distraction by properties of individual objects marred bytheir own peculiarities. Rather, we should try toobserve a similar type of objects as a probe over awide range of areas and depths to conduct a kindof “cosmic census” with as unbiased sampling
as possible in order to unveil the nature of the
Universe itself. Of special interest is the nature ofdark energy, which is responsible for the accelerated expansion of the Universe, yet its nature is
unknown. By accurately measuring the expansion
history, we hope to determine the nature of darkenergy behind it, and extrapolate the history into
the future to address the question what the fate of
the Universe is. Moreover, the dark energy poses a
serious challenge to particle physicists because theestimated size of the vacuum energy is 10120 toolarge. To overcome this challenge, many theoretical possibilities had been proposed to explain theaccelerated expansion, including “alternative gravity” theories different from that by Einstein.

40

IPMU Annual Report 2011

Sloan Digital Sky Survey III
Immediately after the launch, IPMU joined thelargest scale survey project called Sloan Digital
Sky Survey, which was slated to start in 2009 on
a 2.5-m telescope on Apache Point, New Mexico,
USA. The current phase combines the imaging andspectroscopic survey over a large area of 10,000
square degrees.
The IPMU contributed CCDs, the critical elementof the imaging survey which is now completed.
The resulting publication called Data Release 8 (H.
Aihara et al., Astroph. J.Suppl., 193, 29 (2011)) is
the largest image of the Universe obtained in astronomy to date with more than a trillion pixels.
The collaboration is now in the mode of spectroscopic survey to precisely determine the motion ofgalaxies along the line of sight using the red shiftof spectral lines. The completed imaging survey
will allow us to identify a particular type of galaxy called Luminous Red Galaxy that serves as
an unbiased sample. The combination of imaging

and spectroscopic survey allows us to observe thecharacteristic distance scale in the distributionof galaxies called the baryon acoustic oscillation(BAO) which results from the sound waves in the
hot plasma of atomic nuclei (baryons), electrons,
and photons when the Universe was as hot as 3,500
degrees. The distance of BAO acoustic peaks canbe precisely calculated based on the current dataso that it provides a standard ruler to measure
distances over the cosmological scales accurately.
Since the distance is synonymous to time, and thered shift is nothing but the expansion of space, wewill obtain far more precise data of the expansion
history from z ≈ 0.6 and on than currently available. Seven faculty members and many postdocs
are involved in SDSS-III at the IPMU.
HyperSuprimeCam
The next major survey project is an imaging survey using the 8.2-m Subaru telescope on Mauna
Kea owned by National Astronomical Observatoryof Japan (NAOJ). The new digital camera called
HyperSuprimeCam (HSC) is being built with approximately 0.9-billion pixels weighing 3 tons together with the sophisticated and precise corrector
lens system. Thanks to the much bigger mirror, thesurvey will probe much deeper into the younger
Universe to extend the measurement of the expansion history back to earlier times, and determine
the nature of the dark energy with the best accuracy anticipated in the next five years in a head-tohead competition with the US project Dark Energy
Survey (DES).
The project was already underway before the
IPMU started based on the collaboration of NAOJ,
the University of Tokyo, KEK, Princeton University, and ASIAA (Taiwan). The primary measurement technique is based on the weak gravitational
lensing that maps out the distribution of (invisible)
dark matter by the shear of images of distant galaxies. The growth of the dark matter structure isdetermined by the expansion history, which depends on the nature of dark energy.
Immediately after the launch, the IPMU quickly
created a hub of activities for the HSC hosting regular meetings and assembling a team for analyzing
the data, building upon the experience with SDSSIII. We put together the core team for this project,
by appointing Associate Professor Masahiro Takada with an expertise in analyzing the weak lensing
data, Associate Professor Naoki Yoshida who cancreate mock catalog using computer simulations,and Professor Naoki Yasuda with expertise on data

handling. Further addition of Assistant Professors
John Silverman, Masamune Oguri, and Kevin
Bundy expands the scientific scope of the imaging
survey into super-massive black holes and galaxy
evolution. In addition, the project turned out tobe impossible without the financial contributions
from the IPMU which amount to approximately ahalf of the project cost. The major portion comesfrom the 3.4 billion yen award from the FIRST(Funding Program for World-Leading Innovative
R&D on Science and Technology) program to Director Hitoshi Murayama starting in 2010.
We are making steady progress for this major survey. The camera is being readied for the first lightin the fall this year. The first data challenge took
place in 2010. The actual survey is expected tostart in the year 2012.
PrimeFocusSpectrograph and SuMIRe
It is clear from the experience with SDSS-III that
we obtain drastically enhanced information by following up an imaging survey with a spectroscopic
survey. Currently no major spectroscopic survey
is planned beyond SDSS-III in the world. Murayama’s FIRST award is precisely the combination of the HSC imaging survey and the new spectroscopic survey on the same Subaru telescope
to cover about the same comoving volume as theSDSS-III extending into much younger Universe.
The combination is dubbed SuMIRe (Subaru Measurement of Images and Redshifts). Even though
Murayama was trained as a theoretical particle
physicist, he now leads an international collaboration of astronomers and instrumentalists to build
the next generation multi-object spectrograph witha robotic fiber positioner that can simultaneously
take spectra of thousands of galaxies at the sametime, an example among many cross-disciplinary
developments at the IPMU.

Research Highlight

6.1.3

Even though the award of 3.4 billion yen is not sufficient for SuMIRe, international partners pledged
to contribute resources to build the proposed
multi-object spectrograph. Caltech and NASA Jet
Propulsion Laboratory will contribute the robotic
fiber positioner with 10 micron accuracy, Princeton and Laboratoire d’Astrophysique Marseilles
will build spectrograph covering 380 to 1300 nm,
allowing for a continuous red shift survey of galaxies from nearby to z ≈ 6 using OII and Lyman
alpha lines. The formation of collaboration is wellunderway and the conceptual design will be fixedby this September.

IPMU Annual Report 201141

Dedicated Studies

Even though the large-scale surveys are the key tothe most cosmological studies, dedicated studies ofparticular type of astronomical objects prove crucial for detailed understanding and interpretationof survey results. Such studies are already wellunderway at the IPMU and many results had beenobtained, providing important input on systematic
errors for the SDSS-III, HSC, and PFS surveys.
Supernovae
The initial discovery of accelerating expansion
and hence dark energy was based on the observation of Type-Ia supernovae billions of light years
away. Type-Ia supernovae are exploding stars that
become brighter than their host galaxies, and areclearly visible even at such distances. PI Ken Nomoto pioneered theoretical investigations of thenature of such explosions, concluding that they
are the binary system of a white dwarf and an accompanying star, where the accretion of gas fromthe star onto the white dwarf exceeds the Chandrasekhar limit against the instability to form a
black hole. Because the Chandrasekhar limit does
not depend on the precise nature of the object orthe environment, Type-Ia supernova exhibit a remarkable universality that their luminosities are
more or less the same dubbed “standard candles,”
at least for those observed nearby. However, itremained an important question if those far away
are indeed the same, which was the basic assumption behind the claimed discovery of dark energy.
If there is a systematic variation among the supernovae, it would cast doubt on the discovery of darkenergy.
We appointed Assistant Professor Keiichi Maeda
to look into the possibility of such a systematic
variation among the supernovae, because he had
proposed new ways to calibrate the individuality
among supernovae in a series of theoretical investigations. He then turned into observing supernovae himself, an example of cross-disciplinary developments at the IPMU. He quickly showed thatsupernova explosions are not spherical, by observing the supernovae intentionally 100 days after the
initial dramatic phase when they became “boring.”
This way, the “dust has cleared” and he could observe the core of the explosion, which exhibitedthe bipolar spectrum of the oxygen lines. The bipolar spectrum implies that the Doppler shifts dueto the expanding core shows two prominent velocities along the line of sight, demonstrating theaspheric explosions (Science, 319, 1220 (2008)).
However, this observation was about a different
type of supernova explosions called core-collapse,
targeted by the EGADS discussed earlier.
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IPMU Annual Report 2011

Maeda then extended the study to Type-Ia, thecritical ones for the dark energy. There indeed has
been a concern that the evolution of spectra from
Type-Ia supernovae appears to show individuality,
casting doubt on the purported standard candle.
In his publication (Nature, 466, 82 (2010)), he had
demonstrated using the new observations that theapparent individuality is due to the viewing angleof aspheric explosions. This work settles one of the
major concerns about the Type-Ia supernovae as
the standard candle.
At the same time, obtaining more samples ofType-Ia supernovae for close examinations would
be extremely useful. PI Ken Nomoto managed tore-observe the supernova reported by Tycho Braheback in 1572, thanks to a dust cloud that reflects
light and produced an “echo.” Using the modern
telescope, he showed that it was a Type-Ia supernova (Nature, 456, 617 (2008)).
To continue calibration of the Type-Ia supernovae, we appoint a distinguished postdoc Robert
Quimby this fall who had discovered a new andthe brightest type of supernovae, and get involvedin the Palomar Transient Factory II to assemble
the largest sample of supernovae ever.
Clusters
Clusters of galaxies have high concentrations ofdark matter which had been shown conclusively by
the strong gravitational lensing, where a distant galaxy which happens to be exactly behind the cluster
is seen as a “giant arc.” However, modern statisticalanalysis allows for a systematic study of shear ofimages even when the gravitational lensing effectis not as dramatic. This study requires an excellent
imaging, possible only with some of the newest andbest telescopes, and careful analyses of systematics.
Furthermore, this weak lensing effect constitutes
the basis of the HSC survey to map out dark matter
distribution and the nature of dark energy behind it.
Understanding systematic errors would be the key
question for the HSC survey.
Associate Professor Masahiro Takada was trained
as a theoretical astrophysicist, but now is moving
into mapping the dark matter distributions fromobservations of a large number of galaxy clusters
even when the gravitational lensing effect is only
as small as 10%. Using his expertise, he demonstrated that the distribution of dark matter in 25
clusters is not spherical with a high statistical significance (MNRAS, 405, 2215 (2010)), consistent
with expectation by computer simulations likethose by Naoki Yoshida discussed below. By using
an improved theoretical prediction and observation, he also placed a theoretically robust limit on
the mass of neutrinos (Phys. Rev. D 79, 023520(2009).
Distinguished Postdoc Masayuki Tanaka discovered the most distant spectroscopically confirmed
X-ray cluster in the Subaru/XMM-Newton deep

field (Astrophys. J. Lett. 716, L152 (2010)). It exemplifies kinds of observations we can perform
more routinely with the Hyper-SuprimeCam in
the future that allows us to search systematicallyfor distant clusters, which will test theoretically
predicted formation of structure using numericalsimulations by Yoshida and others.

6.3 Theoretical Astrophysics and Phenomenological Particle
Physics
Results from the large-scale surveys, dedicated observations, and big experiments have to be interpreted in thecontext of theoretical frameworks. At the same time, theory makes quantitative predictions and provides service
to make the analyses of the data possible. Having both types of researchers under the same roof (and sometimes
in the same bodies!) makes this cross-fertilization an important aspect of the IPMU research program.

6.3.1

Computational Astrophysics and Cosmology

Computational cosmology studies the evolutionof the structure in the Universe from the initialcondition observed in the cosmic microwave background, the ancient light from the Universe only
380,000 years old. So-called “N-body simulations” that studies the structure in the dark matter
distribution are well established, thanks to their
non-interacting nature that makes the simulation
relatively easy. However, inclusion of atomic matter proves highly non-trivial as they interact via
the electromagnetic as well as gravitational forces,
complicating the simulation. In addition, study ofthe observed structure requires a huge dynamic
range from the billions of light years (size of theobservable Universe) down to a few light minutes(distance between the Sun and the Earth).
Associate Professor Naoki Yoshida pioneered
numerical simulation to study the interaction of
atomic matter over the required huge dynamic
range. In his publication (Nature, 459, 49 (2009)),
he outlines the evolution from the so-called dark

6.3.2

ages to the formation of first stars and galaxies. In
another publication together with the PI Ken Nomoto, they proposed a new theory of forming super-massive black holes in early galaxies by accretion of gas and dark matter (JCAP, 8, 024 (2009)).
His simulations are roughly five years ahead of thecompetition. The work by Yoshida together with aparticle physics postdoc Cosimo Bambi and others
showed an obstacle of accretion to super-spinningblack holes (Phys. Rev. D 80, 104023 (2009)).

Research Highlight

6.2.2

In addition to theoretically understanding the observed structure, his work provides the mock catalog of stars and galaxies that can be compared to
the forthcoming large-scale surveys to understandthe systematic errors. For example, PI Naoshi Sugiyama, together with Yoshida, Takada, and IPMU
postdocs, published a detailed examination of the
non-Gaussian errors which turned out to be a nonissue despite claims otherwise in the literature(Astrophys. J., 701, 945(2009)).

Large-scale Structure

The evolution of structure can be worked out theoretically using the linear approximations, namely
to the first order in its inhomogeneity. However, theobserved structure shows non linear effects that are
crucial in comparison between the observations andtheory. Obtaining accurate theoretical predictionsin the non-linear regime is becoming a focus of attention in the recent research world wide.

For instance, the constraint on the neutrino massfrom the large-scale structure of the Universe isan interesting area of research at the intersection of particle physics and astronomy. However,obtaining accurate theoretical predictions has
been the major obstacle. Takada, a theoreticalastrophysicist, developed an improved theory at
higher orders in inhomogeneities in the presence

IPMU Annual Report 201143

6.3.3For example, measuring masses of new particles
that decay into an invisible particle in a cascade isa well-known difficult problem. A kinematic variable called mT2 had been proposed as a means toAssistant Professor Fuminobu Takahashi had
proposed a novel possibility to explain the older
cosmic-ray data from dark-matter decays while
avoiding excessive production of antiprotons before the recent data by assigning lepton numbers

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IPMU Annual Report 2011

a different mechanism to enhance the annihilation in the halo dubbed Breit-Wigner enhancement(Phys. Rev. D 79, 095009 (2009)), which may be
relevant in the future even when the current interpretation of data will not turn out to be correct.

address this problem. However, the initial state radiation, which becomes increasingly harder as theparticle mass increases, complicates the definitionof mT2. We added a new PI Mihoko Nojiri rightafter the launch, and she proposed a new strategy
based on mT2min to solve this complication (Phys.
Rev. Lett., 103, 151802 (2009)). An even more difficult problem is to measure spins of new particles.
PI Hitoshi Murayama proposed a novel techniqueusing interference among the helicity states thatare free from model assumptions (Phys. Rev. D 78,
014028 (2008)).

Based on the experiments and observations, and using the bridge between data and theory, IPMU aims at deciphering the basic laws of the Universe. Using quantum field theory and string theory, new theories are being developed. In addition, many of them turn out to be useful for applications to other branches of science.

On the other hand, Nojiri picked up a novel model
proposed by IPMU postdocs Park and Shu inspired by the cosmic-ray data and developed its
detailed phenomenology of its collider signals forthe first time (JHEP, 9, 078 (2009)). Murayama
proposed a different model motivated by the unexpected large forward-backward asymmetry in the
top-quark pair production at Tevatron and worked
out its collider consequences (Phys. Rev. D 81,
015004 (2010)). PI Tsutomu Yanagida collaborated with an experimentalist for a detailed study of
how to test the anomaly mediated supersymmetry
breaking mechanism (proposed by Murayama andothers) at the LHC (Phys. Lett. B 664, 185 (2008)).

Explicit models often receive severe constraints
from many apparently disconnected experimental
data sets. PI Tsutomu Yanagida has been working
on models of the mechanism of gauge-mediatedsupersymmetry breaking. In a series of papers, hemanaged to demonstrate that it is possible to satisfy all constraints from the large-scale structureof the Universe, dark matter searches, collider
searches, stability against quantum tunneling.

Cosmic-ray phenomenology

IPMU is addressing the nature of dark matter withthe underground experiment XMASS, astronomical observations, theoretical models, and collider
data. In addition, cosmic rays may contain products of dark matter annihilations in the Milky Way
halo. In fact, some of the recent data from PAMELA (positrons), ATIC, and FERMI (electronsand positrons) showed excess beyond past expectations, while their interpretation is not clear yet.

Note that many models proposed in the literaturethat enhance the dark matter annihilation in thehalo relies on the Sommerfeld enhancement effectwhich had been proposed by PI Nojiri and Associate Professor Shigeki Matsumoto back in 2003. In
addition, PI Yanagida and Murayama pointed out

6.4 Fundamental Theory

Collider Phenomenology

Collider experiments provide unique opportunities to probe the conditions of the early Universe
beyond what can ever be studied optically, namely
the surface of last scattering where atoms are ionized due to high temperatures and the mean freepath of photons is microscopic. Similarly to theobservational astronomy, data from the collider
experiments such as Tevatron and the LHC arevast and complicated, and require detailed theoretical studies that allow for extracting crucial information. Of particular interest is the productionof dark matter particles that escape detection, andtheir existence and properties need to be inferredfrom other particles produced at the same time.
Such an analysis requires clever ideas as well as
detailed and accurate theoretical predictions. On
the other hand, as the data inspire new models,
it is critical to work out the consequences of newmodels to the collider signal. This is the two-way
bridge that would be indispensable when newphysics is discovered. Sometimes direct collaboration between theorists and experimentalists proves
useful.

6.3.4

In addition, Takada and others showed that the
combination of imaging and spectroscopic surveys
would be sensitive to alternative theories of gravity at cosmological distances (Phys. Rev. D 81,
023503 (2010)). This direction of research appears
to fuse the research on fundamental theories andastronomical observations.

(similar to electrons) to the dark matter particles(JCAP, 02, 004 (2009)). The model became oneof the targets of more recent experiments. PI
Tsutomu Yanagida proposed dark-matter decays
instead of annihilations that avoid many of otherexisting constraints within the lifetime range motivated by grand-unified models (Phys. Lett. B 673,
247 (2009)). Their joint work was the first paper topropose a hidden gauge boson (Phys. Lett. B 673,
255 (2009)). Postdocs Jing Shu and Seongchan
Park worked by themselves and proposed a newkind of extra-dimensional model to explain thedata (Phys. Rev. D 79, 091702 (2009)).

6.4.1

Model Building

Motivated by observed data and inspired by the
proposed fundamental theories such as string
theory, “model building” serves as the link to build
the fundamental theory. For instance, the observed
masses of three generations of quark and lepton are
different by order(s) of magnitudes among generations and the standard theory offers no explanations. F-theory, a version of string theory compactified on elliptic Calabi-Yau four-folds, was proposed
as a natural way to explain this pattern. However,complications in understanding these manifolds
make the link technically challenging. Associate
Professors Taizan Watari (physicist) and Yukinobu
Toda (mathematician) tackled these complications
with a careful analysis of sheaves and showed that

6.4.2

the original model proposed by Cumrun Vafa andothers actually did not work as hoped(Nucl. Phys.
B 806, 224 (2009)). Watari further published aseries of papers studying how new models can beconstructed to achieve the original aim.

Research Highlightof massive neutrinos, as demonstrated by theSuper-Kamiokande and KamLAND experiments
and predicted by PI Yanagida, to attain a robust
theoretical predictions and published in a physics journal (Phys. Rev. Lett., 100, 191301 (2008),
Phys. Rev. D 80, 083528 (2009)), another exampleof cross-fertilization.

Fundamental Laws and Alternative Gravity Theories

To construct fundamental laws to describe the Universe, in particular the black holes or the Big Bangitself, it is crucial to incorporate microscopic physics (quantum mechanics) and macroscopic physics(general relativity) into a single framework. Thiseffort has been hampered by uncontrollable infinities in theoretical calculations. Currently the string
theory presents the best hope in this direction.
However, the string theory still lacks a precise
definition while it is very rich in its structure, andhence working out explicit consequences of thetheory is very challenging.
There has been a long-standing problem in thequantum aspects of black holes. As Stephen
Hawking pointed out, black holes actually have entropy. However entropy in thermodynamics arises
from microscopic degrees of freedom in statisticalmechanics, and how to count the microscopic de-grees of freedom has been the challenge. PI Hirosi
Ooguri tackled this problem using the topologicalstring theory and a recent mathematical works
by Okounkov and others on the wall crossing in
the Donaldson-Thomas theory, and generalized
the consistent counting by the previous works toarbitrary non-compact toric Calabi-Yau manifolds(Comm. Math. Phys., 292, 179 (2009)). The counting was found equivalent to the ways atoms can beremoved from melting crystals. He further showed
how the smooth classical description arises fromthis picture (Phys. Rev. Lett., 102, 161601 (2009)).
Ooguri also has a series of papers to address themechanism of supersymmetry breaking from thestring-theory perspective, connecting to the model-building activity in view of the experimental
and observational constraints.

IPMU Annual Report 201145

6.4.3

expansion of space called inflation (JCAP, 6, 001(2009)). It provided a strong motivation to study
˘
this Horava-Lifshitz
model further worldwide. In
addition, postdocs Domenico Orlando and Susanne Reffert (Class. Quant. Grav., 26, 155021
˘(2009)) showed that the Horava-Lifshitz
model isindeed likely to be renormalizable by relating its
divergence structure to that of the topologicallymassive gravity. This paper was cited as 2010
Highlights of Classical Quantum Gravity Journal.

Applications to Other Areas

String theory has such a rich structure that makes
it possible to accommodate a wide range of physical systems. In recent years, it became a very active subject to use the string theory as a frameworkrather than the fundamental theory of gravity.
Professor Shigeki Sugimoto is well-known for
the Sakai-Sugimoto model to describe theoryof strong interactions using the string theory, as
exemplified by his Kimura Prize in Theoretical
Physics, Yukawa-Tomonaga Prize, and Outstanding Paper Prizes from Japanese Physical Society
twice. Using his model, he carried out the detailed
investigations of the properties of baryons (proton,
neutron, etc) including their magnetic moments
and form factors, and showed that the predictions
are quite consistent with the data beyond the an-ticipated level of accuracies (Prog. Theor. Phys.,
120, 1093 (2008)).
Associate Professor Tadashi Takayangi has produced a series of papers discussing the application of string theory to condensed matter physics.
In particular, topological insulators are arguably
the hottest subject in condensed matter physics
in recent years. Takayanagi demonstrated thatthe string theory is useful in classifying different
types of topological insulators (Phys. Lett. B 693,
175 (2010); Phys. Rev. D 82, 086014 (2010)). He
has also pointed out the relationship between theevolution of the black hole entropy and the entanglement entropy in condensed matter systems witha Todai graduate student (JHEP, 1011, 054 (2010)).

6.5 Mathematics
Research in mathematics strongly influences research in theoretical physics as it enables attack
on problems not conceivable before. At the sametime, needs and progress in theoretical physics inspire new directions in mathematics research. The
IPMU intends to develop this type of cross-fertilization not possible with the traditional departmental structure in the University. In addition tothe original group of PIs, we have appointed a new
PI Alexey Bondal who is half-time at the IPMU,
Associate Professor Yukinobu Toda, and AssistantProfessors Satoshi Kondo, Todor Milanov.
Furthermore, some of our physicists have strong
background in mathematics. We appointed Professor Kentaro Hori away from Toronto University,where he held a half-time position each in Physics and Mathematics departments. PI Ooguri, aphysicist, won the inaugural award of the Leonard
Eisenbud Prize from American MathematicalSociety, and holds a position both in the Physics

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IPMU Annual Report 2011

and Mathematics Departments at Caltech. Manyof our members publish in the journals at the interface between physics and mathematics, such as
Advances in Theoretical and Mathematical Physics, Communications in Mathematical Physics,
Communications in Number Theory and Physics.
Despite very different style in publications, there
are even articles coauthored by physicists andmathematicians as mentioned above.
One particular interest among mathematicians is
the mirror symmetry between complex analytic
and symplectic manifolds, which was originallysuggested by the string theorists studying thecompactification of string theory on Calabi-Yau
3-folds. Further developed by Kontsevich, Fukaya
and others into the homological mirror symmetry
conjecture, this is an active area of research closely related to the string theory. The latest appointment, Assistant Professor Todor Milanov works
on a unique approach to the mirror symmetry byconstructing generating function for the GromovWitten invariant for mirror-symmetric pairs using
the integral systems (KdV hierarchy). PI Alexey
Bondal pioneered derived category of coherent
sheaves, which has become the basis for understanding properties of D-branes in string theory.
Our members attack various hard mathematicalproblems such as Beilinson conjecture, Generalized Moonshine Conjecture, Strominger-YauZaslow conjecture. We added new PIs Kyoji Saito
and Alexey Bondal since the launch because of
their strong track record for laying foundations forthe branches of mathematics that became crucial
tools for physics research later.
As mentioned already above, Toda has helped
Watari to work out consequences on the quark andlepton masses of a model based on the F-theory
formulation of the string theory. He has beenworking on the derived category of the sheaves,relevant to the dynamics of D-branes in the string
theory as well as structure of Calabi-Yau manifolds on which string theory is compactified. He
introduced new enumerate invariants of curves
on Calabi-Yau 3-folds which generalized counting
invariants of stable pairs introduced by Pandharipande and Thomas (Duke Math. Journ., 149, 157208 (2009)). He then investigated the space of certain weak stability conditions on the triangulated
category of D0-D2-D6 bound states on a smoothprojective Calabi-Yau 3-fold, and constructed the
DT type invariants counting semi-stable objects
in his triangulated category, which are new curvecounting invariants on a Calabi-Yau 3-fold (Journ.
Amer. Math. Soc., 23, 1119-1157 (2010)). Bothworks have close relationship to the wall-crossing
phenomena, and were inspired partially by thejoint workshop on wall crossing between physicists and mathematicians at the IPMU.
Since the Fields-Medal paper by the physicist Witten, which related topological field theories to thetheory of knots and braids, this also has been acommon area of interest between physicists andmathematicians. PI Toshitake Kohno showedthat the bar complex of the configuration spaceof ordered distinct points in the complex plane isacyclic (Topology and its Applications, 157, 2-9(2010)). The 0-dimensional cohomology of thisbar complex is identified with the space of finite
type invariants for braids. He constructed a universal holonomy homomorphism from the braid
group to the space of horizontal chord diagrams
over Q, which provides finite type invariants for
braids with values in Q.
PI Hirosi Ooguri discovered that the elliptic genusof the K3 surface has a natural decomposition interms of dimensions of irreducible representationsof the largest Mathieu group M24 (Exper. Math.
20, 91 (2011)). This observation has inspired
mathematicians worldwide to understand theorigin of this mysterious connection. In his otherwork (Comm. Number Theory Physics, 2, 743-801(2008)), he obtained constraints on the spectrumof primary fields in 2D conformal field theories
from the moduliary of the elliptic genus. Modular forms lie at the intersection of quantum field
theory in physics and many areas of mathematics
including arithmetic geometry.
Assistant Professor Satoshi Kondo works on arithmetic geometry. In his publication (Journal ofPure and Applied Algebra, 215, 511-522 (2011)),he showed that the product structures of motivic
cohomology groups and of higher Chow groups
are compatible under the comparison isomorphismof Voevodsky, extending the result of Weibel,
where he used the comparison isomorphism whichassumed that the base field admits resolution of
singularities. The mod n motivic cohomology
groups and product structures in motivic homotopy theory are defined, and it is shown that the
product structures are compatible under the comparison isomorphisms. In a series of papers yet tobe published, he has shown how to generalize atheorem of Beilinson on K2 of a modular curve tothe situation of Drinfel’d modular curves, and theexistence of a formula that should be regarded as
the first evidence, in higher dimensions, toward
the correct statement of Beilinson’s conjectures forfunction fields. We will appoint Assistant Professor Tomoyuki Abe who works also on the arithmetic geometry but from the algebraic point of view.

Research Highlight˘
Recently, Petr Horava
proposed a novel way tounify quantum mechanics and gravity keeping
the divergences in calculations under control(renormalizable). Whether the proposal correctly
reproduces Einstein’s general relativity is still
not clear. Associate Professor Shinji Mukohyama
quickly took up this proposal and studied its relevance to cosmology. He pointed out it naturally
produces the scale-invariant cosmological perturbation needed to explain the observed structure of
the Universe without resorting to the accelerated

PI Kyoji Saito is interested in the global transcendental nature of functions and numbers, which appear in connection with several moduli problems
in mathematics. In one approach he developed thetheory of period integrals of primitive forms, which
had big impact on the string theory research andbecame one of the basic tools called the Frobenius
manifold structure. The other approach he takes
is by statistical mechanical limit procedure, connected to thermal and statistical physics. In his
recent work (Publ. RIMS, 46, 37-113 (2010)), he developed a general frame work on the space Ω ( Γ,G)of thermo-dynamical limit functions (free energy)
associated to the Cayley graph of any cancellative
monoid Γ. They are, at present, abstractly definedin certain Hopf algebra as accumulating points offinite free energy, is hardly calculable. But, in certain good cases he showed that some traces of such
limit F-functions can be expressed as a residue ofcertain meromorphic functions.

IPMU Annual Report 201147

7 Awards

The Mathematical Society of Japan Geometry Prize wasawarded to Kyoji Saito for his contribution in geometry of
period integrals. He has modernized the theory of elliptic integrals and period integrals developed by Euler, Abel, Jacobi
and others in the 18th to 19th centuries. This work has great
influence not only on various fields of mathematics, but also
on the developments in the frontier of today’s theoreticalphysics.

Tomoyuki Abe was awarded the 2011 Takebe Prize of theMathematical Society of Japan for his work on the theoryof arithmetic D -modules and its application to arithmetic
geometry. On varieties over field of characteristic p, thetheory of l -adic ( l ≠ p ) cohomology is well established.
Since around the 60s, a “good” theory of p -adic cohomology has been searched and a candidate has been the theoryof arithmetic D -modules initiated by Berthelot. But it is yet
to be constructed. Abe contributed to its foundation as well
as application to a ramification theory.

Masahiro Ibe won the Young Scientist Award in theoreticalparticle physics jointly with Ryuichiro Kitano of Tohoku
University for their paper “Sweet Spot Supersymmetry”
that appeared in Journal of High Energy Physics in 2007.
They have proposed a scenario for explaining the symmetry
breaking mechanism of the supersymmetry theory in which
the gravity-mediation and gauge-mediation
work together in such a way that constraints of cosmologicalphenomenology are naturally satisfied.

48

IPMU Annual Report 2011

Masaomi Tanaka won the Inoue Research Award for Young
Scientists for his work on three dimensional properties ofsupernova explosions. Based on detailed simulations and polarimetric observations using Subaru telescope, he showedthat supernovae are not spherically symmetric, but actually
have three-dimensional structures. He moved to NAOJ in
December 2011.

Brice Menard won the 2012 Sloan Research Fellowship.
This fellowship seeks to stimulate fundamental research by
early-career scientists and scholars of outstanding promise.
He has been working on cosmology, galaxy formation, andgravitational lensing analysis of large imaging and spectroscopic surveys.

AwardsThe 16th JPS Award for Academic Papers on Physics wasawarded to Shigeki Sugimoto jointly with Hiroyuki Hata,
Tadakatsu Sakai and Shinichiro Yamato. This award isgiven to the authors of important papers published in JPSJ
and Progress of Theoretical Physic within the past 5 years.
Their paper “Baryons from Instantons in Holographic QCD”
(Prog. Theor. Phys., 117 1157 (2007)) calculated the baryon
spectrum by applying gauge/string duality to QCD.

Masataka Fukugita (left) and Tsutomu Yanagida (right)
jointly received the Yoji Totsuka Memorial Prize for theirimportant contribution in the study of baryon number asymmetry. The model they proposed, widely known as Leptogenesis, explains the present-day matter-dominated universe
as a consequence of CP violation among heavy right-handed
neutrinos during the period when the universe underwent
electroweak phase transition. The concept of heavy righthanded neutrinos, known as “See-saw mechanism” wasintroduced in 1970s by Yanagida for explaining the extreme
smallness of neutrino masses. The Leptogenesis, although
not experimentally verified yet, is one of the most elegant
approaches for explaining the baryon number asymmetry,and has been giving great impact to particle physics as wellas to cosmology.

Takaaki Kajita was awarded the Japan Academy Award for
discovering the neutrino oscillation in the atmospheric neutrinos. Kajita and his collaborators, working first at Kamiokande and later at Super-Kamiokande, established a method
to distinguish muon-type and electron-type in the atmospheric neutrinos, leading to an observation of deficit in the
muon-type neutrinos from expectation. Based on subsequentdetailed study, they discovered that the reason of the deficit
was due to the oscillation of muon-type to electron-type during flight.

IPMU Annual Report 201149

8 Seminars
Kentaroh Yoshida (Kyoto U)
Yangian symmetry in deformed WZNW models onsquashed spheres
May 24, 2011

Masahito Ueda (U Tokyo)
Maxwell’s Demon: Introduction to Information
Thermodynamics
Jun 22, 2011

Junichi Tanaka (U Tokyo)
Recent results from ATLAS at the LHC
May 25, 2011

Masamune Oguri (IPMU)
Dark matter distribution in clusters from strong + weaklensing
Jun 23, 2011

Masahito Yamazaki (Princeton U)
6=3+3
May 31, 2011
Jacob Bourjaily (Princeton U)
Quantum Field Theory and the Analytic S Matrix, Redux
Jun 01, 2011
Jan de Boer (U Amsterdam)
Some recent results on microstate geometries
Jun 01, 2011
John Silverman (IPMU)(Astro)-supercolliders: growing black holes in galaxy
mergers
Jun 02, 2011
Alexander Vikman (CERN)
Cosmology, Scalar Fields and Hydrodynamics
Jun 03, 2011
Murray Brightman (MPE)An X-ray - infrared study of AGN unification and selection
Jun 07, 2011

JFY2011
Norimi Yokozaki (U Tokyo)
Soft Leptogenesis and Gravitino Dark Matter in
Gauge Mediation
Apr 06, 2011

Takashi Moriya (IPMU)
Supernova Explosions in Dense Circumstellar
MediumApr 21, 2011

Masayuki Tanaka (IPMU)
A new method to identify AGNs and the nature of
low-luminosity AGNs
Apr 07, 2011

Kazunobu Maruyoshi (SISSA)
Quantized integrable systems, matrix models and
AGT correspondence
Apr 26, 2011

Kazuo Hosomichi (YITP)SUSY Gauge Theories on Squashed Three-Spheres
Apr 12, 2011

Koichi Hamaguchi (IPMU)
The Unification of Forces
Apr 27, 2011

Keiichi Maeda (IPMU)
Asymmetry in Type Ia Supernovae: An Origin of
Their Observational Diversities?
Apr 14, 2011

Masahiro Takada (IPMU)
Information content in cosmological observables
Apr 28, 2011

Mitsutoshi Fujita (IPMU)
Geometric entropy and confinement / deconfinementtransition in d = 4 QCD like theories
Apr 19, 201150

IPMU Annual Report 2011

Massimo Bianchi (U Rome)
Small Black-Holes and Higher Spin States in
Heterotic String
May 17, 2011

Yoshitaka Hatta (Tsukuba U)
Jets at weak and strong couplingApr 20, 2011

Takahiro Tanaka (YITP)
Natural selection of inflationary vacuum required byinfra-red regularity and gauge invarianceMay 18, 2011

Masahiro Futaki (U Tokyo)
On the construction of the virtual fundamental class
Apr 20, 2011

Yasunobu Uchiyama (SLAC/Stanford U)
The Supernova Origin of Galactic Cosmic Rays
May 18, 2011

David Spergel (Princeton U & IPMU)
Cosmology Results from the Atacama Cosmology
Telescope
Jun 08, 2011
Yu Nakayama (Caltech)
Refined topological string for Omega backgroundJun 14, 2011
Mihoko Nojiri (KEK & IPMU)
Challenges in Fukushima and JapanJun 15, 2011
Marco Valdes (U Pisa)
The high-z interplay between annihilating DM and the IGM
Jun 16, 2011
Martin Schnabl (Inst Phys Prague)
Multiple brane solutions in Open String Field
TheoryJun 20, 2011
Yoshio Sano (National Inst Informatics)
Thermo-dynamical limit function’s seminarJun 20, 2011
Tomoyuki Abe (IPMU)
Product formula for p-adic epsilon factors
Jun 21, 2011

Shunsuke Tsuchioka (IPMU)
Recent advances in modular representation theory of thesymmetric groups
Jun 28, 2011
Jiro Soda (Kyoto U)
Statistical Symmetry Breaking in the CMB
Jun 29, 2011
Morimitsu Tanimoto (Niigata U)
Impact of Large θ 13 on Flavor Physics
Jun 30, 2011
Yoichi Kazama (U Tokyo)
Green-Schwarz superstring with conformal symmetry
Jul 05, 2011
Anzhong Wang (Baylor U)
Anisotropic scalings and a theory of quantum gravity
Jul 06, 2011
Takamitsu Tanaka (Columbia U/MPI Astrophys)
Modeling the Electromagnetic Signature of Merging
Supermassive Black Holes
Jul 07, 2011
Kimitake Hayasaki (Kyoto U)
A Road to Supermassive Black Hole Merger
Jul 07, 2011

Seminars

Adam Amara (ETH-Zurich)
Gravitational Lenses of the Dark Universe
May 26, 2011

Yosuke Imamura (Titech)
Exact results in 3d gauge theories andM-theory
Jul 12, 2011
Eiichiro Komatsu (U Texas)
Cosmic Near Infrared BackgroundJul 14, 2011
Christian Schnell (IPMU)
Some results from Hodge theory
Jul 19, 2011
Clifford Cheung (UC Berkeley)Signs of a Hidden Sector from Supersymmetry(s)Jul 20, 2011
Masami Ouchi (ICRR)
Probing the Epoch of Reionization
Jul 21, 2011
David Morrison (UCSB)
Mirror symmetry and non-complete intersection CalabiYau manifolds
Jul 25, 2011
Maximo Pernas (KIT)
Ultra High Energy Cosmic Rays: latest results from the
Pierre Auger Observatory
Jul 26, 2011

IPMU Annual Report 201151

Jason Rhodes (NASA JPL)WFIRST and Euclid
Sep 15, 2011

Jean Coupon (Tohoku U)
New insights on galaxy evolution since z ~ 1.2 from the
CFHT Legacy Survey
Jul 28, 2011

Rob Myers (Perimeter Inst)
Holographic Entanglement Entropy
Sep 27, 2011

Tatsuma Nishioka (Princeton U)
A Chiral Magnetic Effect from AdS/CFT with Flavor
Aug 02, 2011
Siu Cheong Lau (IPMU)SYZ mirror symmetry for toric Calabi-Yau manifolds
Aug 05, 2011

Sudeep Das (BCCP/UC Berkeley/LBL)
A New View of the CMB from the ATACAMA Cosmology
Telescope
Sep 28, 2011

Taizan Watari (IPMU)
F-theory and elliptic fibrations; physics intro & casual
discussion of math aspects
Aug 09, 2011

Tristan Smith (UC Berkeley)
Looking for cracks in the standard cosmological model:
neutrinos and non-Gaussianity
Sep 29, 2011

Jock McOrist (U Cambridge)
Linear Sigma Models and Heterotic Vacua
Aug 15, 2011

Richard Ellis (Caltech)Did galaxies reionize the Universe: progress and challenges
Oct 03, 2011

Suet-Ying Mak (U Southern Cal)
Constraints on modified gravity from future surveys
Aug 16, 2011

Takeshi Morita (U Crete)
Gregory-Laflamme as the confinement / deconfinementtransition in holographic QCD
Oct 04, 2011

Kathryn Zurek (U Michigan)
Asymmetric Dark MatterAug 23, 2011
Seong-Chan Park (Chonnam National U)
Super-Planckian scattering at the LHC
Aug 24, 2011
Thomas Greif (MPI Astrophys)
The formation of the first stars and galaxies
Aug 25, 2011

Richard Ellis (Caltech)
Cosmic Dawn: The Quest for the First Stars and Galaxies
Oct 05, 2011
Biplob Bhattacherjee (IPMU)
Jet substructure and new physics searches at the LHC
Oct 06, 2011
Richard Ellis (Caltech)
Observational probes of dark energy: the role of HSC and PFS
Oct 06, 2011

Kenichi Konishi (Pisa U)
The monopole-vortex complex: dual gauge symmetry fromflavorAug 26, 2011

Shin’ichiro Ando (U Amsterdam)
Gamma-ray probes of dark matter annihilation
Oct 11, 2011

Jaewon Song (Caltech)
ABCD of 4d/2d correspondence
Aug 30, 2011

Bunyo Hatsukade (Kyoto U)
Millimeter Survey of Distant Dusty Starburst Galaxies
Oct 13, 2011

Raphael Ponge (SNU)
Noncommutative Geometry and the Hirzebruch-RiemannRoch FormulaAug 31, 2011

Peter Behroozi (Stanford U)
Constraining the Complete Star Formation History of
Observable Galaxies from z = 0 to z = 8
Oct 13, 2011

Olivier Dore (NASA JPL)
Planck Early Measurements of the Cosmic Infrared
Background Anisotropies
Sep 01, 2011

Naoki Yoshida (IPMU)
Elements of Gravitational Lensing: Introduction to weaklensing
Oct 13, 2011

Noppadol Mekareeya (Imperial Coll London)
Universalities of Theories with Tri-vertices
Sep 06, 2011

Norihiro Iizuka (CERN)
On the Taxonomy of Holographic Fermi/Non-Fermi
Liquids
Oct 14, 2011

Tzu-Ching Chang (ASIAA)
21-cm Cosmology
Sep 08, 2011
Priyotosh Bandyopadhyay (KIAS)
Aspects of Higgs searches in CP-violating MSSM at theLarge Hadron Collider
Sep 14, 201152

Rob Myers (Perimeter Inst)
Holographic C-theorems
Sep 27, 2011

IPMU Annual Report 2011

Amanda E. Bauer (Australian Astron Obs)
Linking Star Formation Histories with Galaxy Assembly
Oct 20, 2011
Masahiro Komatsu (Nagoya U)
Measurement of the neutrino velocity with the OPERA
detector in the CNGS beam
Oct 20, 2011

Marcus Werner (IPMU)
Introduction to Gravitational Lensing II: Strong lensing,quasi-Newtonian formalism, the lensing map
Oct 20, 2011
Kaoru Ono (Hokkaido U)
Lagrangian Floer theory on compact toric manifolds (Part 1)
Oct 24, 2011
Kaoru Ono (Hokkaido U)
Lagrangian Floer theory on compact toric manifolds (Part 2)
Oct 24, 2011
Peng Zhao (DAMTP)
Electromagnetic duality from integrable spin chain
Oct 25, 2011
Chunshan Lin (IPMU)
A Matter Bounce By Means of Ghost Condensation
Oct 27, 2011

Constantin Shramov (Steklov Math Inst & HSE)
On tetragonal construction of R. Donagi
Nov 08, 2011
Scott Tremaine (IAS Princeton)
Stellar dynamics lecture - 2: integration algorisms
Nov 09, 2011
Marcus Werner (IPMU)
Gravitational Lensing III
Nov 10, 2011
Jean-Philippe Uzan (Inst Astrophys Paris)
Testing the equivalence principle: the link between
constants, gravitation and cosmology
Nov 10, 2011
Fedor Smirnov (U Paris 6)
Fermionic structure in lattice, conformal and massive
integrable field theory
Nov 14, 2011

Noriyuki Abe (Hokkaido U)
On a classification of irreducible modulo p representationsof a split p-adic groupOct 27, 2011

Timothy Logvinenko (U Warwick)
Derived Reid’s recipe for threefold singularities (Part I)
Nov 14, 2011

Johannes Andersen and Birgitta Nordstrom (Niels Bohr Inst)The Origin of the Elements in the Universe
Oct 28, 2011

Timothy Logvinenko (U Warwick)
Derived Reid’s recipe for threefold singularities (Part II)
Nov 15, 2011

Scott Tremaine (IAS Princeton)
Supermassive Black Holes and Galaxies
Nov 02, 2011

Richard Hill (U Chicago)
Universal behavior in the scattering of heavy, weaklyinteracting dark matter on nuclear targets
Nov 15, 2011

Scott Tremaine (IAS Princeton)
Seminar on Supermassive Black Holes
Nov 04, 2011
Alan McConnachie (NRC Herzberg Inst)
Towards the Next Generation of the CFHT: a dedicated,
10m, wide-field, highly-multiplexed spectroscopic facility
for Mauna Kea
Nov 07, 2011
Scott Tremaine (IAS Princeton)
Two lectures on the extrasolar planet: observational andtheoretical (1)Nov 07, 2011
Aleksandr Ivanovich Efimov (Steklov Math Inst)On Donaldson-Thomas theory for quivers with potentials(Part I)
Nov 07, 2011
Scott Tremaine (IAS Princeton)
Two lectures on the extrasolar planet: observational andtheoretical (2)Nov 07, 2011
Aleksandr Ivanovich Efimov (Steklov Math Inst)On Donaldson-Thomas theory for quivers with potentials(Part II)
Nov 07, 2011
Ivan Cheltsov (U Edinburgh)
What are higher-dimensional analogues of Dn, E6 , E7 andE8 singularities?
Nov 08, 2011
Scott Tremaine (IAS Princeton)
Stellar dynamics lecture - 1: Kozai-Lidov resonanceNov 08, 2011

Fedor Smirnov (U Paris 6)
Hidden fermionic structure of the XXZ modelNov 15, 2011
Changzheng Li (IPMU)
Quantum cohomology of flag varieties
Nov 16, 2011
Jun Zhang (U Texas)
Conquering Systematic Errors in Weak Lensing
Measurements
Nov 16, 2011

SeminarsYuichiro Nakai (YITP)Inflation in Gauge Mediation and Gravitino Dark MatterJul 27, 2011

Jens Chluba (U Toronto)
Signals from the cosmological recombination era andspectral distortions of the CMB
Nov 17, 2011
Tadashi Takayanagi (IPMU)
Introduction to AdS/CFT Correspondence
Nov 17, 2011
Dmitri Panov (King’s College London)
Hyperbolic geometry and symplectic Calabi-Yau varieties
Nov 18, 2011
Yanki Lekili (U Cambridge)
Fukaya category of the punctured torus
Nov 19, 2011
Siu-Cheong Lau (IPMU)
Enuemerative meaning of mirror maps for toric CalabiYau manifolds
Nov 21, 2011
Akira Shudo (Tokyo Met U)
The Stokes geometry of a quantum nonintegrable map
Nov 22, 2011

Valeri Frolov (U Alberta)
Spinoptics in a stationary spacetime
Nov 08, 2011

IPMU Annual Report 2011

53

John Kehayias (IPMU)
Discrete R-Symmetries and Generalized Gaugino
Condensation (and Three Generations)Nov 24, 2011
Francesco Miniati (ETH)
Generation of Magnetic Field in Cosmic Structure
Nov 24, 2011
Marcus Werner (IPMU)
Introduction to Gravitational Lensing IV: Schwarzschildlens and the singular isothermal sphere,
image magnification, critical set
Nov 24, 2011
Jim Gunn (Princeton U)
Lectures on photometry and detectors (Part 1)
Nov 28, 2011
Jim Gunn (Princeton U)
Lectures on photometry and detectors (Part 2)
Nov 28, 2011
Shinji Hirano (Nagoya U)
Summing up All Genus Free Energy of ABJM Matrix
Model
Nov 29, 2011

Hiroyuki Kawamura (KEK)
Parton distribution functions and CDF dijet anomaly
Jan 18, 2012

Masaki Shigemori (KMI Nagoya U)
Exotic branes, double bubbles, and superstrata
Dec 12, 2011

Marcus Werner (IPMU)
Gravitational Lensing VI : “Magnification invariants andLefschetz fixed point theory”
Jan 19, 2012

Jim Gunn (Princeton U)
Lectures on image processing, spectroscopy andspectrophotometry (Part 1)
Dec 12, 2011
Jim Gunn (Princeton U)
Lectures on image processing, spectroscopy andspectrophotometry (Part 2)
Dec 12, 2011
Kiyoshi Takeuchi (U Tsukuba)
Confluent A-hypergeometric functionsand rapid decay
homology cycles
Dec 13, 2011
Toshiyuki Kobayashi (U Tokyo)
Global Geometry and Analysis on Locally HomogeneousSpacesDec 14, 2011
Adam Falkowski (LPT Orsay)
Spinning the Top
Dec 15, 2011

Alexei Smirnov (ICTP Trieste)
Challenges of neutrino oscillation physics
Nov 30, 2011

Marja Hanussek (U Bonn)
Probing neutrino masses in the baryon triality cMSSM at√s = 7 TeV
Dec 15, 2011

Omar Benvenuto (U Nacional de La Plata)
Signals of Quark-Gluon Plasma Formation in
Astrophysical Environments
Dec 01, 2011

Thomas Flacke (U Michigan & Wurzburg U)
Precision constraints on UED models and implications for
the LHC
Dec 16, 2011

Jim Gunn (Princeton)
Lectures on photometry and detectors (Continued)
Dec 01, 2011

Izuru Mori (Shizuoka U)
McKay Type Correspondence for Quantum Projective
Spaces (Part 1)
Dec 19, 2011

Andrei Pajitnov (U Nantes)
The Novikov homology and complex hyperplanearrangements
Dec 01, 2011
Jim Gunn (Princeton U)
Lectures on optics and the atmosphere (Part 1)
Dec 05, 2011
Jim Gunn (Princeton U)
Lectures on optics and the atmosphere (Part 2)
Dec 05, 2011
Yasuaki Hikida (Keio U)
Higher spin AdS3 supergravity and its dual CFT
Dec 06, 2011
Fanky Wong (U Hong Kong)
Gravitational lensing in a dark matter free braneworldmodel
Dec 06, 2011
Naoyuki Tamura (NAOJ)
Subaru fiber multi-object spectroscopy: current & future
instruments for large census in astronomy
Dec 07, 2011
Jim Gunn (Princeton U)
Studying the Evolution of Galaxies with the Subaru
Telescope
Dec 07, 2011

54

Chris Hirata (Caltech)
Understanding the cosmic recombination epoch
Dec 08, 2011

IPMU Annual Report 2011

Izuru Mori (Shizuoka U)
McKay Type Correspondence for Quantum Projective
Spaces (Part 2)
Dec 19, 2011
Marcus Werner (IPMU)
Magnification invariants and Lefschetz fixed point theory:
Caustics and their classification, global and universal
magnification invariants
Dec 19, 2012

Reina Reyes (Chicago KICP)
Observational constraints on disk galaxy formation from
Tully-Fisher relation and weak gravitational lensing
Jan 19, 2012
Misha Verbitsky (IPMU)
Trisymplectic manifolds
Jan 19, 2012
Albrecht Klemm (U Bonn)
Refined holomorphic anomaly equations
Jan 20, 2012
Misha Verbitsky (HSE, National Res U)
Twistor correspondence for hyperkaehler manifolds andthe space of instantons
Jan 23, 2012
Shankadeep Chakrabortty (IOP Bhubaneswar)
Dissipative force on an external quark in heavy quarkcloud
Jan 24, 2012
Misha Verbitsky (HSE, National Res U)
Trihyperkaehler reduction
Jan 24, 2012
Yingjie Peng (ETH Zurich)
A Global Model for Galaxy Evolution: Simplicity and its
Consequences
Jan 25, 2012
Amir Aazami (Duke U)
Gravitational lensing VII : “Magnification invariants andorbifolds”
Jan 26, 2012
Aleksey Cherman (DAMTP Cambridge)
Long-distance properties of baryons in the
Sakai-Sugimoto modelJan 30, 2012
Ben Davison (U Oxford)
Motivic Donaldson Thomas invariants and the Kontsevich
Soibelman integration map (Part I)
Jan 30, 2012

Risa Wechsler (KIPAC/Stanford U)
The Galaxy-Dark Matter Connection across Mass andTime
Feb 02, 2012
Ken Intriligator (UCSD)SCFTs, OPEs, and susy breaking mediation
Feb 03, 2012
Wu-yen Chuang (NTU)BPS State Wallcrossing and ADHM Sheaf Theory (Part I)
Feb 06, 2012
Wu-yen Chuang (NTU)BPS State Wallcrossing and ADHM Sheaf Theory (Part II)
Feb 06, 2012
Yuri Prokhorov (Moscow State U)
Subgroups of Cremona groups I
Feb 08, 2012
Mathias Garny (DESY)
Towards a quantum treatment of leptogenesis
Feb 08, 2012
Sergei Blinnikov (ITEP)Supernova shocks in circumstellar medium: from puzzles
to cosmological tools
Feb 08, 2012
Yuri Prokhorov (Moscow State U)
Subgroups of Cremona groups II
Feb 09, 2012
Elena Sorokina (Sternberg Astron Inst)SN explosions inside extended non-hydrogen circumstellar
shells
Feb 09, 2012
Alexander Dolgov (U Ferrara)
Electric and magnetic screening in plasma with charged
Bose-Einstein condensate
Feb 09, 2012
Raphael Flauger (IAS/NYU)
Axion Monodromy Inflation and Related Phenomenology
Feb 15, 2012
Tomer Tal (Yale U)
Evolution of the most massive galaxies: a statistical studyof SDSS LRGs
Feb 16, 2012
Jeremiah Heller (Bergische U Wuppertal)Atiyah-Hirzebruch spectral sequences for real varieties
Feb 17, 2012

Ben Davison (U Oxford)
Motivic Donaldson Thomas invariants and the Kontsevich
Soibelman integration map (Part II)
Jan 30, 2012

Yukari Ito (Nagoya U)
McKay correspondence via G-Hilbert schemes
Feb 20, 2012

Satoshi Shirai (UC Berkeley)
Model Discrimination at the LHC
Dec 22, 2011

Philip Argyres (U Cincinnati)
Instantons on R3 × S 1 and a semi-classical realization of IR
renormalons
Jan 31, 2012

David Curtin (SUNY Stony Brook)
Spontaneous R-symmetry breaking with Multiple
Pseudomoduli
Feb 22, 2012

Akihiro Tsuchiya (IPMU)
Lefschetz fixed point theory: Real Lefschetz fixed point
formula and intersection theory
Dec 24, 2011

Akihiro Tsuchiya (IPMU)
Tensor structure on module category of Wp Vertex
Operator Algebras
Jan 31, 2012

Alexander Getmanenko (IPMU)
Asymptotic analysis of the function Ei(x)Feb 23, 2012

Yasunori Nomura (UC Berkeley)
Quantum Mechanics, Gravity, and the Multiverse
Jan 04, 2012

Thomas Sotiriou (SISSA)
Black holes in Einstein-aether and Horava-Lifshitz gravity
Feb 01, 2012

Daniel Brattan (Durham U)
Fluid gravity at finite r
Dec 20, 2011

Seminars

Sharon Rapoport (Mt. Stromlo Obs)
Gravitational Lensing as the Source of Enhanced Strong
MgII Absorption Towards Gamma-Ray Bursts
Nov 24, 2011

Mitsutoshi Fujita (U Washington)
SL(2,R) duality on AdS/BCFT
Feb 24, 2012

IPMU Annual Report 201155

Takeo Higuchi (KEK)The Upcoming Grand Challenge by the Super B-Factory
ExperimentFeb 27, 2012
Evgeny Shinder (MPIM)
Mahler measures and pencils of Calabi-Yau varieties
Feb 28, 2012
Alexander A. Voronov (U Minnesota)
Derived fusion tensor productMar 01, 2012

Takashi Oka (U Tokyo)
Strong field QFT in condensed matter photoinduced
topological phase transition and manybody Schwinger
mechanism
Mar 28, 2012
Mircea Voineagu (IPMU)
Filtrations of the singular homology of real varieties
Mar 29, 2012
Alexandre Kozlov (IPMU)
Search for new physics using underground detectors
Mar 30, 2012

Tony Pantev (U Pennsylvania)
Mirror symmetry and mixed Hodge structures
Mar 05, 2012
Pyungwon Ko (KIAS)
A Resolution of the Flavor Problem of Two Higgs Doublet
Models with U(1) H Higgs flavor Symmetry
Mar 07, 2012
Giovanni Morando (U Padova/RIMS)The Riemann-Hilbert correspondences and sheaves onsubanalytic sites
Mar 07, 2012
Shinji Mukohyama (IPMU)
Introduction to Inflationary Universe
Mar 07, 2012
Giorgos Leloudas (U Copenhagen)Hydrogen-deficient explosions and their environments
Mar 08, 2012
Masashi Hamanaka (Nagoya U)
Soliton Theories and Quasideterminants
Mar 08, 2012

Seminars

Chan-Y. Park (Caltech)Ramification Points of Seiberg-Witten Curves
Mar 13, 2012
Christian Schnell (IPMU)
Holonomic D-modules on abelian varieties
Mar 15, 2012
Yefeng Shen (U Michigan)
Landau-Ginzburg/Calabi-Yau correspondence of all
genera for elliptic orbifold P1
Mar 19, 2012
Gleb Arutyunov (U Utrecht)
Towards q-deformations of the Mirror
Mar 21, 2012
Kohei Kamada (DESY)
Spontaneous Cogenesis from the MSSM Flat Direction as
the Origin of Matter and Dark MatterMar 21, 2012
Joseph Anderson (U Chile)
Core-collapse supernovae as tracers of massive starformation within nearby galaxies
Mar 22, 2012
Noppadol Mekareeya (MPI Munich)Integer Partitions, 3d Mirror Symmetry and 3d Gauge
Theories
Mar 27, 2012
Asantha Cooray (UC Irvine)
Cosmology at Sub-mm Wavelengths: From Herschel to
CCAT and Beyond
Mar 27, 2012

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IPMU Annual Report 201157

9 Conferences

May 30–June 2
Focus Week “Astrophysics of Dark Matter”

February 13–17, 2012
Workshop “Extended Root Systems and Fundamental Groups”

July 29
Town Meeting on Future Program on High-Energy Physics in Japan

March 2, 2012
Workshop “Particle Physics of the Dark Universe”

September 5–10
The 2011 IPMU-YITP School and Workshop on Monte Carlo Tools for LHC

March 12–16, 2012
IAU Symposium 279 “Death of Massive Stars: Supernovae and Gamma Ray Bursts”

Conferences

JFY2011

October 31–November 4Workshop “Curves and Categories in Geometry and Physics”

January 10–20, 2012
The 6th Asian Winter School “Strings, Particles and Cosmology”

January 23–February 3, 2012
Workshop “Testing Gravity with Astrophysical and Cosmological Observations”

February 1, 2012
Mini Workshop “Physics at SuperKEKB”

February 13–22, 2012
Workshop “Growing Black Holes in COSMOS”

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IPMU Annual Report 2011

IPMU Annual Report 201159

10 Conference Talks
JFY2011
Seminar at IHEP
(2011.04, IHEP China)
Wei Li
Understanding Flat Space holography via
Entanglement
Seminar at ITP(2011.04, ITP China)
Wei Li
Holography and Entanglement of Flat Space
Seminar at Tsinghua Univ
(2011.04, Tsinghua Univ, China)
Wei Li
Holography and Entanglement of Flat Space
Joint Seminar on Number Theory of Laboratoire J.-V.
Poncelet and IITP RAS(2011.04.04, Independent Univ Moscow)
Sergey Galkin
Kummer and Niemeier (Fano and Mathieu - II)
Seminar at Perimeter Inst(2011.04.05, Ontario, Canada)
Tadashi Takayanagi
Holographic Entanglement Entropy and Its
Applications
Seminar at CCPP
(2011.04.12, New York Univ, New York)
Cosimo Bambi
Testing the Kerr black hole hypothesis
Seminar at Sofia Univ
(2011.04.13, Sofia, Bulgaria)
Todor Milanov
The primitive forms of K. Saito
Seminar at Tsukuba Univ
(2011.04.13, Tsukuba)
Alexander Getmanenko
Resurgent analysis of the Witten Laplacian in one
dimension
Max-Planck Inst fuer astrophysics seminar(2011.04.14, Garching, Germany)
Naoki Yoshida
The Collisionless Boltzmann Equation
Seminar at the Univ Mississippi(2011.04.14, Oxford, Mississippi)
Cosimo Bambi
Testing the Kerr black hole hypothesis
Marx Review, LBNE Science Subcommittee(2011.04.15, SLAC)Mark Vagins
Gadolinium, EGADS, and LBNE
Seminar at Zhejiang Univ
(2011.04.15, Hangzhou, China)
Kai Wang
A revisit to top quark forward-backward asymmetries

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IPMU Annual Report 2011

ITA Univ Heidelberg colloquium(2011.04.18, Heidelberg)
Naoki Yoshida
Simulating structure formation in the early universe
Seminar at Penn State(2011.04.18, State College, Pennsylvania)
Cosimo Bambi
Testing the Kerr black hole hypothesis
Seminar at HKU(2011.04.19, Hong Kong)
Emille E. O. Ishida
Cosmic Explosions: the role of SN in Cosmology
Physics Seminar(2011.04.19, Hong Kong Univ)
Rafael de Souza
Cosmic Explosions-GRBs
Ludwig-Maximilian-Univ Colloquium(2011.04.20, Munchen)
Masahiro Takada
Subaru weak lensing study of X-ray luminous clusters
Seminar at Excellence of Cluster(2011.04.21, Garching, Germany)
Masahiro Takada
Cosmological constraints on neutrino masses
Seminar at CfA(2011.04.22, Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts)
Cosimo Bambi
Testing the Kerr black hole hypothesis
From Black Holes to Hydrodynamics(2011.04.27, Univ Victoria, Canada)
Shinji Mukohyama
Dynamical black hole as a holographic dual of
Bjorken Flow
American Physical Society Meeting(2011.04.30, Anaheim, California)
Hirosi Ooguri
Spatially Modulated Phases
Seminar at Univ Washington(2011.05.03, Seattle)
Mitsutoshi Fujita
Geometric entropy and confinement / deconfinementtransition
Seminar at Univ Vienna(2011.05.04, Vienna)
Sergey Galkin
Fano and Mathieu, Kummer and Niemeier
Seminar at INR Moscow(2011.05.05, Moscow)
Shinji Mukohyama
Cosmological implications of Horava-Lifshitz gravity

Colloquium at Univ Chicago(2011.05.06, Chicago)
Toshiyuki Kobayashi
Global Geometry and Analysis on Locally SymmetricSpaces-Beyond the Riemannian Case

Special day on Lie groups(2011.05.17, Utrecht Univ, the Netherland)
Toshiyuki Kobayashi
Restrictions of Verma Modules to Symmetric Pairs andSome Applications to Differential Geometry

Seminar at Texas Cosmology Center(2011.05.06, Univ Texas Austin)
Tsz Yan Lam
Velocity Probe on Cosmology

Seminar at Cosmology Group of Berkeley(2011.05.17, Berkeley)
Tsz Yan Lam
Velocity Probe on Cosmology

Seminar at Univ Vienna(2011.05.06, Vienna)
Sergey Galkin
Mutations of potentials and shards of the mirror

NERQUAM Meeting(2011.05.19, Yale Univ)Charles Steinhardt
Broad [OIII] Emission in SDSS Quasars

Number Theory and Physics at the Crossroads (11w5001)(2011.05.08 - 2011.05.13, Banff, Canada)
Sergey Galkin
Fano and Mathieu

Seminar at Caltech(2011.05.20, Pasadena)
Tsz Yan Lam
Velocity Probe on Cosmology

PHENO 2011 symposium(2011.05.09 - 11, Univ Wisconsin, Madison)
Won Sang Cho
Mass Measurement in Boosted Decay Systems at Hadron
CollidersSymplectic geometry and related topics(2011.05.23 - 27, Chengdu, China)
Todor MilanovLandau-Ginzburg/Calabi-Yau correspondence for simple
elliptic singularities

Colloquium at Univ Tokyo(2011.05.10, Tokyo)
Masayuki Tanaka
A new method to identify AGNs and the nature of lowluminosity AGNs

Frascati Workchop 2011: Multifrequency Behaviour ofHigh Energy Cosmic Sources(2011.05.23 - 28, Vulcano, Italy)
Keiichi Maeda
Core-Collapse Supernova Diversities: From the Weakest
to Most Powerful Explosions
Keiichi Maeda
Type Ia Supernova Explosion Mechanism and Implication
for Cosmology

Seminar at Max Planck Inst for Astrophysics(2011.05.10, Garching, Germany)
Emille E. O. Ishida
PCA in Cosmology
Seminar at Cosmology Group of Berkeley(2011.05.10, Berkeley)
Masahiro Takada
Subaru weak lensing study of X-ray luminous clusters
Colloquium at Kyoto Univ
(2011.05.13, Kyoto)
Masayuki Tanaka
A new method to identify AGNs and the nature of lowluminosity AGNs
Cosmological Non-Gaussianity: Observations Confront
Theory Workshop(2011.05.13 - 15, MCTP, Ann Arbor, Michigan)
Tsz Yan Lam
Peculiar Velocity and primordial non-Gaussianity
The 20th General Meeting of the ILC Physics Working Group(2011.05.14, KEK)
Shigeki Matsumoto
Studying Very Light Gravitino at the ILC
NSF/CBMS conference on Deformation Theory of Algebrasand Modules(2011.05.16 - 20, NCSU, Raleigh, North Carolina)
Alexander A. Voronov
Quantum Deformation Theory
Three String Generations(2011.05.16 - 20, IHES, Paris)
Hirosi Ooguri
Comments on Worldsheet Formulation of the Omega
Background

Seminar at YITP
(2011.05.25, Kyoto)
Masaomi Tanaka
3D Explosion Geometry of Core-Collapse Supernovae
FTPI Seminar(2011.05.26, Univ Minnesota)
Emir Gumrukcuoglu
Cosmology in the “ UV” limit of Horava-Lifshitz gravity
Essential Dimension and Birational Geometry(2011.05.27 - 28, Univ Edinburgh)Sergey Galkin
Cremona and Mathieu
ALMA high-z workshop(2011.05.31, NAOJ, Mitaka, Japan)
Tomoki Saito
Constraining the dust contents of extended-Lya-selected
objects at z > 3

Conference Talks(including seminars given outside IPMU)

Excellence Cluster Universe Colloquium(2011.05.31, Garching, Gernamy)
Rafael S. de Souza
Constraints on Population III.1 and III.2 Gamma-Ray
Burst Rate
Seminar at Tsinghua Univ
(2011.06.02, Beijing)Todor Milanov
W-constraints for simple singularities
Seminar at Nagoya Univ
(2011.06.02, Nagoya)
Masahiro Takada
Stacked weak lensing and its cosmological applications

IPMU Annual Report 2011

61

Kyoto Univ Algebraic Geometry Seminar(2011.06.03, Kyoto)
Sergey Galkin
New ways to count up to 15
Stellar and Intermediate Mass Black Holes: Gravitational
Physics and Radiation Sources Across the
Universe(2011.06.05 - 26, Aspen, Colorado)
Cosimo Bambi
Testing the Kerr black hole paradigm with electromagnetic
radiation
Eleventh Workshop on Non-Perturbative Quantum
Chromodynamics(2011.06.06 - 10, Paris)
Shigeki Sugimoto
QCD and String Theory
KIAS Summer School on Mirror Symmetry: Mirror
Constructions for Fano Varieties(2011.06.06 - 11, Anmyundo, Korea)
Sergey Galkin
Five lectures on Fano Mirrors (Mirror Constructions for
Fano Varieties)
Seminar at ICG(2011.06.07, Univ Portsmouth, UK)
Shinji Mukohyama
Cosmological implications of Horava-Lifshitz gravity
MPE seminar(2011.06.07, Garching, Germany)
Rafael S. de Souza and Emille E. O. Ishida
Probing cosmic star formation up to z = 9.4 with GRBs
Seminar at Univ Tokyo Komaba(2011.06.09, Tokyo)
Domenico Orlando
The Gauge-Bethe correspondence: Dualities and Branes
Workshop on the Arithmetic of Function Fields(2011.06.13 - 17, Imperial College London, UK)
Satoshi Kondo
On the values of Drinfeld modular Beilinson-Kato typeelements at supersingular points
Seminar at Univ Heidelberg(2011.06.15, Heidelberg)
Johanna KnappCalabi-Yaus, F-theory, Toric Geometry and beyond
Seminaire de Geometrie Arithmetique Paris-Tokyo(2011.06.15, Univ Tokyo and IHES)
Tomoyuki Abe
Product formula for p-adic epsilon factors
Seminaire de topologie(2011.06.17, Institut Fourier, Grenoble)
Toshitake Kohno
La theorie de Morse-Novikov pour arrangements
d’hyperplans
Seminar at ASIAA(2011.06.17, ASIAA, Taiwan)
Hajime Sugai
Subaru’s Future - Prime Focus Spectrograph in SuMIRe
Project Seminar at Utrecht Univ
(2011.06.17, Utrecht, the Netherlands)
Johanna KnappCalabi-Yaus, F-theory, Toric Geometry and beyond

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IPMU Annual Report 2011

Representation Theory XII(2011.06.19 - 26, Dubrovnik, Croatia)
Toshiyuki Kobayashi
Restrictions of Verma Modules to Symmetric Pairs andSome Applications to Differential Geometry
IX. International Workshop: Lie Theory and Its Applications
in Physics(2011.06.20 - 26, Varna, Bulgaria)
Toshiyuki Kobayashi
Analysis on Minimal Representations
Supernovae and their Host Galaxies(2011.06.20 - 24, Australian National Maritime Museum,
Sydney)Masaomi Tanaka
Spectropolarimetry of Type Ib/c Supernovae
Keiichi Maeda
Asymmetric SN Ia Explosions and Their Observational
Diversities
Seminar at Tohoku univ
(2011.06.20, Sendai) Masayuki Tanaka
A new method to identify AGNs and the nature of lowluminosity AGNs
Supernovae and Their Host Galaxies(2011.06.20 - 24, Australian National Maritime Museum,
Sydney)Keiichi Maeda
Asymmetric SN Ia Explosions and Their Observational
Diversities
35th Johns Hopkins Workshop on AdS/CFT and its
Applications(2011.06.22 - 24, Budapest)
Shigeki Sugimoto
Holographic Description of Hadrons from String Theory
Strings 2011
(2011.06.27 - 07.01, Uppsala, Sweden)
Tadashi Takayanagi
Holographic Entanglement Entropy and its New
Developments
Strings and Cats Meeting in Vienna(2011.06.29 - 07.01, Vienna)
Sergey Galkin
Mirror’s symmetry
Sergey Galkin
The ubiquity of reflexivity
Johanna KnappCalabi-Yau Manifolds and Dualities from the Gauged
Linear Sigma Model
Seminar at IoA, Univ Tokyo(2011.06.30, Tokyo)
Masayuki Tanaka
A new method to identify AGNs and the nature of lowluminosity AGNs
Seminar at RESCEU, Univ Tokyo(2011.07.04, Tokyo)
Emir Gumrukcuoglu
Primordial anisotropy as a source of statistical isotropy
breaking
Intensive lecture course at Univ Tokyo(2011.07.07 - 14, Tokyo)
Masahiro Takada
Lecture series “Weak gravitational lensing”
Gravity, Lorentz Violation & Superluminality(2011.07.11 - 15, INR, Moscow)
Shinji Mukohyama
Cosmology and black hole with ghost condensate

Homological Mirror Symmetry and Category Theory(2011.07.11 - 15, Split, Croatia)
Sergey Galkin
Non-commutative mirror symmetry

Hyperplane arrangements and applications(2011.08.08 - 12, PIMS, Univ British Columbia, Vancouver)Toshitake Kohno
Morse-Novikov theory for hyperplane arrangements

Kiso Observatory Schmidt Symposium 2011
(2011.07.13 - 14, Kiso, Japan)
Masaomi Tanaka
Supernova Survey with KWFC

Summer Institute 2011
(2011.08.12 - 18, Fuji-Yoshida, Japan)
Shigeki Matsumoto
Dark matter and Baryon asymmetries from sneutrino
condensate

Intensive Lectures at Hokkaido Univ
(2011.07.13 - 15, Sapporo, Japan)
Tadashi Takayanagi
String Theory
Seminar Sophus Lie(2011.07.15 - 16, Erlangen, Germany)
Toshiyuki Kobayashi
Multiplicities of Irreducible Representations
Seminar at Perimeter Inst(2011.07.21, Waterloo, Canada)
Cosimo Bambi
Testing the nature of black hole candidates
Seminaire de topologie(2011.07.23, Univ de Nantes, France)
Toshitake Kohno
Groupe de monodromie de la theorie des champs
conformes
2011 Summer School & Workshop: Weak and Strong
Gravitational Lensing(2011.07.23 - 08.03, NAOC, Beijing)
Masahiro Takada
Lecture 1: WL Systematics
Lecture 2: WL Higher-Order Statistics
Lecture 3: WL Simulations
Branching problems for unitary representations(2011.07.25 - 29, Max Planck Inst for Mathematics, Bonn)Toshiyuki Kobayashi
Branching problems for unitary representations–algebraic
aspects
Toshiyuki Kobayashi
Branching problems for unitary representations–analytic
aspects
Singularity theory and its applications(2011.07.25 - 31, USTC, Hefei, China)
Toshtiake Kohno
Monodromy groups of conformal field theory
Christian Schnell
Hodge modules on abelian varieties
INT Summer School on Applications of String Theory(2011.07.25 - 29, Univ Washington, Seattle)
Shigeki Sugimoto
Holographic Mesons and Baryons
4th international conference in Integrable systems andmathematical physics(2011.07.25 - 29, Wuhan, China)
Todor Milanov
W-constraints for Frobenius manifolds
Seminar at Univ Tokyo(2011.07.26, Tokyo)
Hajime Sugai
Challenges with Subaru Telescope
Summer School for Young Astronomers(2011.08.01 - 04, Aichi, Japan)
Keiichi Maeda
Type Ia Supernovae: Current Status and Future
Perspectives

Arithmetic and Geometry of K3 surfaces and Calabi-Yau
threefolds(2011.08.16 - 25, Fields Inst, Toronto)
Christian Schnell
The fundamental group is not a derived invariant
Seminar at MCTP
(2011.08.16, Ann Arbor, Michigan)
Shinji Mukohyama
Cosmological implications of Horava-Lifshitz gravity
15th Lomonosov Conference on Elementary Particle
Physics(2011.08.18 - 24, Moscow State Univ)
Alexandre Kozlov
Towards the KamLAND-Zen experiment
String Phenomenology 2011
(2011.08.22 - 26, Univ Wisconsin, Madison)
Taizan Watari
Studying GPD in Holographic QCD
The Fifth Asia-Pacific Conferences on Few-Body problems in
Physics 2011
(2011.08.22 - 26, Sungkyunkwan Univ, Seoul)
Shigeki Sugimoto
Hadrons from string theory
Seminar at Kinki Univ
(2011.08.22, Higashi Osaka, Japan)
Mitsutoshi Fujita
Probing AdS Wormholes by Entanglement Entropy
Sendai Symposium(2011.08.23, Tohoku Univ, Sendai)Toshitake Kohno
Lecture 1, Homological representations of braid groups
and KZ equations
Lecture 2, Quantum representations of mapping classgroupsSUSY 2011(2011.08.27 - 09.02, Fermilab)
Sourav Mandal
Quarks and Leptons as Nambu-Goldstone Fermions Under
E7/SO(10)Conference Talks

RIMS Algebraic Geometry Seminar(2011.06.02, Kyoto)
Sergey Galkin
Mirrors for Mori and Mukai

Lie Groups: Geometry and Analysis (JSPS/DFG seminar)(2011.09.05 - 10, Paderborn, Germany)
Toshiyuki Kobayashi
Conformally Equivariant Differential Operators and
Branching Problems of Verma Modules
Harmonic Analysis, Deformation Quantization,
Noncommutative Geometry(2011.09.05 - 09, Scalea, Italy)
Toshiyuki Kobayashi
Analysis of Minimal Representations
12th International Conference on Topics in Astroparticle
and Underground Physics(2011.09.05 - 09, Munich)
Jing LIUThe XMASS 800kg experimentAlexandre Kozlov
Status of the KamLAND-Zen experiment

IPMU Annual Report 201163

GOPIRA symposium(2011.09.06 - 7, Kyoto)
Masamune Oguri
Gravitational lens survey with UH88 observation
Masayuki Tanaka
Queue mode observations at Subaru revisited
Large Aperture Millimeter/Submillimeter Telescopes in the
ALMA Era(2011.09.12 - 13, Osaka Prefecture Univ, Osaka)
Masahiro Takada
Subaru HyperSuprimeCam
Workshop on Variation of Cohomology: D-Modules,
Monodromy and Arithmetic(2011.09.14 - 16, Bayreuth, Gernamy)
Sergey Galkin
Apery class and Gamma-conjectures
JPS meeting(2011.09.16 - 19, Hirosaki Univ, Aomori, Japan)
Tadashi Takayanagi
String Theory and Condensed Matter Physics
Shigeki Matsumoto
Studying very light gravitino at the ILC
Univ Minnesota Topology seminar(2011.09.19, Minneapolis)
Alexander A. Voronov
Quantum Master Equation and the topology of moduli
spacesConference on geometric structures in mathematical physics(2011.09.19 - 26, Golden Sands, Bulgaria)
Sergey Galkin
Generalized K3 automorphisms
Cosmology with X-ray and Sunyaev-Zeldovich EffectObservations of Galaxy Clusters(2011.09.19 - 22, Huntsville, Alabama)
Masamune Oguri
Halo Profiles from Lensing Observations of Clusters
KIAS-YITP Joint Workshop “String Theory, Holography,
and Beyond”(2011.09.20 - 24, KIAS, Seoul)
Shigeki Sugimoto
On S-duality in non-supersymmetric gauge theory
Tadashi Takayanagi
Holographic Dual of BCFT
Dark matter and new physics(2011.09.21 - 11.06, KITPC, Beijing)
Shigeki Matsumoto
Dark matter and Baryon asymmetries from sneutrino
condensate
Univ Minnesota Topology seminar(2011.09.26, Minneapolis)
Alexander A. Voronov
QME and the topology of moduli spaces, II: different
approaches to Costello’s theorem
LCWS11(2011.09.26 - 30, Granada, Spain)
Shigeki Matsumoto
Testing Little Higgs Mechanism at Future Colliders

The 21st workshop on General Relativity and Gravitationin Japan (JGRG21)(2011.09.26 - 29, Tohoku Univ, Sendai)
Emir Gumrukcuoglu
Nonlinear perturbations in the GR limit of Horava-Lifshitz
gravity
The mathematical society of Japan autumn meeting(2011.09.28 - 10.01, Shinshu Univ)
Satoshi Kondo
The Riemann-Roch theorem without denominators inmotivic homotopy theory

IPMU Annual Report 2011

KITP Program: Holographic Duality and Condensed Matter
Physics(2011.10.19, Santa Barbara)
Tadashi Takayanagi
Recent Updates of Holographic Entanglement Entropy

Analysis on Lie Groups(2011.09.27, MPI Mathematik, Bonn)Toshiyuki Kobayashi
On real spherical homogeneous spaces

Integrable systems, random matrices, algebraic geometry
and geometric invariants(2011.10.20 - 21, Kyoto Univ)
Satoshi Kondo
On quasi-generic representations of the general linear
group of a non-archimedean local field

DESY Theory Workshop: Cosmology meets Particle Physics(2011.09.27 - 30, Hamburg)
Sergey V. Ketov
Inflation and non-minimal scalar-curvature coupling in
gravity and super-gravity

International Workshop on Geometry and Mathematical
Physics(2011.10.21 - 22, Chinese Univ Hong Kong)
Changzheng Li
Space of lines in G/B

Workshop on Infrared Modifications of Gravity(2011.09.28, ICTP, Trieste)
Shinji Mukohyama
Cosmology and GR limit of Horava-Lifshitz gravity

Seminar at CCNY
(2011.10.21, New York)
Shigeki Sugimoto
Holographic Description of Hadrons from String Theory

Seminar at ATC, NAOJ
(2011.09.29, NAOJ, Mitaka, Japan)
Hajime Sugai
Subaru’s Future - Prime Focus Spectrograph -Southern California Strings Seminar(2011.10.21, UCLA, Los Angeles)
Tadashi Takayanagi
Holographic Entanglement Entropy and AdS/BCFT

Geometry seminar(2011.09.29, Univ Edinburgh)Sergey Galkin
More symmetries of K3

DENET/IAP Conference: The Accelerating Universe(2011.10.24 - 26, Inst Astrophys de Paris)
Hajime Sugai
Progress in Prime Focus Spectrograph Project
Masamune Oguri
The acceleration of the universe as measured by strong
gravitational lensing
Masahiro Takada
Cosmology with SuMIRe HSC/PFS surveys

Colloquium at Inst Theo Phys, Rikkyo Univ
(2011.10.04, Tokyo)
Masahiro Takada
Neutrino mass and cosmology
DAGA(2011.10.06, Univ Padova, Italy)
Tomoyuki Abe
Nearby cycles and vanishing cycles I
Tomoyuki Abe
Nearby cycles and vanishing cycles II
Pre-Planckian Inflation(2011.10.08, Univ Minnesota)
Shinji Mukohyama
Cosmological implications of Horava-Lifshitz gravity
Topology Seminar(2011.10.11, Academy of Mathematics and Systems
Science, Chinese Academy of Sciences, Beijing)
Changzheng Li
Quantum Pieri rules for complex Grassmannians
Gravity and Lorentz violations(2011.10.13, Cambridge, UK)
Shinji Mukohyama
Cosmology and GR limit of projectable Horava-Lifshitz
gravity
Seminar at Caltech(2011.10.14, Pasadena, California)
Tadashi Takayanagi
Holographic dual of BCFTSPICA workshop(2011.10.18 - 19, Nagoya Univ)
Masayuki Tanaka
Synergy between SPICA, HSC, and PSF

64

Seminars on Pure Mathematics(2011.10.19, Hong Kong Univ Sci and Tech)
Changzheng Li
Classical aspects of quantum cohomology of flag varieties

Seminar at Simons Center for Geometry and Phyics(2011.10.25, Stony Brook, New York)
Shigeki Sugimoto
Baryons in holographic QCD with G = SU, SO, SP
NAOJ Theoretical Astrophysics Meeting(2011.10.26 - 28, Yugawara, Japan)
Keiichi Maeda
Progresses in Radiation Transfer Simulations forSupernovae
Seminar at Brown Univ
(2011.10.27, Providence, Rhode Island)
Shigeki Sugimoto
On S-duality in non-supersymmetric gauge theory
Seminar at Lab Astrophys de Marseille(2011.10.28, Marseille)
Masamune Oguri
Stacked lensing: current measurements and future
prospects
Chern Centennial Conference(2011.10.30 - 11.05, MSRI, Berkeley)
Toshiyuki Kobayashi
Analysis on pseudo-Riemannian locally symmetric spaces
Curves and categories in geometry and physics(2011.10.31 - 11.04, IPMU)
Christian Schnell
Hodge modules on abelian varieties

Subaru International Conference on Galactic Archaeology(2011.11.01 - 04, Shuzenji, Japan)
Keiichi Maeda
Nucleosynthesis in Type Ia Supernovae and Observational
Constraints
Seminar at YITP
(2011.11.02, Kyoto)
Tadashi Takayanagi
AdS/BCFTInternational Workshop on Neutrino Physics, Dark Matter andGamma Rays
(2011.11.04 - 06, National Chiao Tung Univ, Taiwan)
Shigeki Matsumoto
The GeV-scale dark matter with B-L asymmetry
Lie Groups, Lie Algebras and their Representations(2011.11.05 - 06, UC Berkeley)
Toshiyuki Kobayashi
Finite Multiplicity Theorems
The 17th International Symposium on Complex Geometry(2011.11.09 - 12, Sugadaira, Japan)
Changzheng Li
Classical aspects of quantum cohomolgy of flag varieties
The 11th International Symposium on Origin of Matter and
Evolution of Galaxies (OMEG11)(2011.11.14 - 17, RIKEN, Japan)
Keiichi Maeda
Nucleosynthesis in Type Ia Supernovae Driven by
Asymmetric Thermonuclear Ignition
Science with HSC AGN survey(2011.11.16 - 18, Kyoto Univ)
Masayuki Tanaka
A novel method to identify AGNs
Masayuki Tanaka
HSC photometric redshift
Masamune Oguri
Quasar pairs
IPMU Colloquium(2011.11.17, IPMU)
Tadashi Takayanagi
Introduction to AdS/CFT Correspondence
2nd Workshop on Quarks and Hadrons under Extreme
Conditions(2011.11.17 - 18, Keio Univ, Tokyo)
Shigeki Sugimoto
On S-duality in Non-supersymmetric Gauge Theory
Black Holes: New Horizons(2011.11.20 - 25, Banff, Canada)
Shinji Mukohyama
Black Holes and GR limit of Horava-Lifshitz gravity

Conference Talks

Derived Categories in Algebraic Geometry(2011.09.05, Steklov Inst, Moscow)
Alexey Bondal
Orthogonal decompositions of sl(n) and mutually unbiased
bases

Tuesday Seminar on Topology(2011.11.22, Univ Tokyo)
Toshitake Kohno
Quantum and homological representations of braid groups
Algebraic geometry seminar(2011.11.25, Osaka Univ)
Christian Schnell
Hodge modules on abelian varieties
Gravitation Focus Group Meeting & Workshop on Frontiers ofGravitation and Cosmology(2011.11.30 - 12.01, National Cheng Kung Univ, Taiwan)
Shinji Mukohyama
Alternative Gravity Theories I: Ghost Condensation
Alternative Gravity Theories II: Nonlinear Massive
Gravity
Alternative Gravity Theories III: Horava-Lifshitz Gravity

IPMU Annual Report 201165

10th Oka Symposium(2011.12.03 - 04 Nara Women’s Univ, Nara, Japan)
Shigeki Sugimoto
Description of hadrons from string theory
Seminar Algebraische Geometrie(2011.12.05, Freie Univ Berlin)
Sergey Galkin
Inequalities and their extremes
Seminar at Kyusyu Univ
(2011.12.09, Kyusyu Univ, Fukuoka)
Tadashi Takayanagi
AdS/CFT and Entanglement Entropy
Suributsuri-Busseikiso Seminar(2011.12.10, Gakusyuin Univ, Tokyo)
Tadashi Takayanagi
Geometric Interpretation of Entanglement Entropy via
AdS/CFT
Noncommutative Algebraic Geometry and D-branes(2011.12.12 - 16, Simons Center, Stony Brook, NewYork)
Johanna Knapp
Phases of non-abelian gauged linear sigma models
International Workshop: Extra Dimensions in the Eraof the LHC(2011.12.12 - 14, Osaka Univ)
Shigeki Matsumoto
Dark matter candidates in the Era of the LHC
SFB647 Colloquium: Raum Zeit Materie(2011.12.13, Berlin)
Sergey Galkin
Towards the Unified Symmetry
YITP workshop: Entanglement in many body systems andrenormalization group(2011.12.14 - 16, YITP, Kyoto)
Tadashi Takayanagi
AdS/CFT and Entanglement Entropy
Workshop: Extremal Laurent Polynomials and Fano Varieties(2011.12.14 - 16, Freie Univ Berlin)
Sergey Galkin
Mirror symmetry between Fano varieties and cluster
varieties
Sergey Galkin
An introduction to extremal Laurent polynomials
IPMU Colloquium(2011.12.14, IPMU)
Toshiyuki Kobayashi
Global Geometry and Analysis on Locally HomogeneousSpacesElastic and Diffractive Scattering(2011.12.16 - 20, Qui Nhon, Vietnam)
Taizan Watari
Studying GPD in Gravity Dual
Particle Cosmology(2011.12.16 - 18, Nagoya)
Masamune Oguri
Testing Lambda CDM with Cluster Lensing
Masahiro Takada
SuMIRe HSC/PFS Project

66

IPMU Annual Report 2011

Cluster workshop(2011.12.18 - 19, Hakone, Japan)
Masayuki Tanaka
HSC+PFS+eROSITA
Masamune Oguri
Measuring cluster mass distributions with gravitational
lensing
Algebraic geometry conference(2011.12.19 - 23, Chulalongkorn univ, Bangkok)
Sergey Galkin
Homologically minimal fourfolds
Mathematics Seminar(2011.12.20, Ajou Univ, Korea)
Changzheng Li
Classical and Quantum Schubert Calculus
Xth International Conference on Gravitation, Astrophysics
and Cosmology(2011.12.21, Qui Nhon, Vietnam)
Shinji Mukohyama
Cosmology and GR limit of Horava-Lifshitz gravity
Supernova Explosions and Numerical Simulations(2011.12.26 - 28, YITP, Kyoto)
Keiichi Maeda
Radiaton Transfer in Supernovae: Recent Progress
Cohomology of Arithmetic Groups (on the occasion ofProf M.S. Raghunathan turning 70 during the year)(2011.12.28 - 31, TIFR, Mumbai)
Toshiyuki Kobayashi
Discrete Spectrum for Non-Riemannian Locally
Symmetric Spaces
Conformally Equivariant Differential Operators and
Branching Problems of Verma Modules. Workshop on
Geometric Analysis on Euclidean and Homogeneous Spaces(in honor of Sigurdur Helgason’s 85th birthday)(2012.01.08 - 09, Tufts Univ, Massachusetts)
Toshiyuki Kobayashi
Conformally Equivariant Differential Operators and
Branching Problems of Verma Modules
East Asian School of Knots and Links(2012.01.09 - 12, KAIST, Daejon, Korea)
Toshitake Kohno
Quantum and homological representations of braid groups
Lie Groups: Structure, Actions and Representations(in honor of Prof Joe Wolf’s 75th birthday)(2012.01.11 - 2012.01.14, Ruhrd Univ, Bochum, Germany)
Toshiyuki Kobayashi
Stable Spectrum for non-Riemannian Locally SymmetricSpacesSeminar at Kyoto univ
(2012.01.11, Kyoto)
Shigeki Matsumoto
Recent Progress on Light Dark Matter Scenario
Seminar at Ochanomizu Univ
(2012.01.12, Tokyo)
Tadashi Takayanagi
AdS/CFT from condensed matter viewpoints
The 4th Series of WPI Joint Seminar in AIMR
(2012.01.20, WPI-AIMR, Tohoku Univ, Sendai)
Tadashi Takayanagi
Condensed Matter as Black Holes in String Theory
Testing Gravity with Astrophysical and CosmologicalObservations(2012.01.23 - 02.03, IPMU)
Emir Gumrukcuoglu
Nonlinear perturbations in the GR limit of HL cosmology

Seminar at Univ Tokyo Komaba(2012.01.26, Komaba, Tokyo)
Shigeki Matsumoto
Present status of dark matter phenomenology
International School on TQFT, Langlands and Mirror
Symmetry(2012.01.31 - 02.04, Huatulco, Mexico)
Sergey Galkin
Homologically minimal fourfolds
Seminar at IoA, Univ Tokyo(2012.02.02, Tokyo)
Hajime Sugai
Two Instruments for Subaru Telescope
The CERN Winter School on Supergravity, Strings, andGauge Theory(2012.02.06 - 10, CERN)
Tadashi Takayanagi
Entanglement Entropy and AdS/CFTFirst LeCosPA Symposium: Towards Ultimate Understandingof the Universe(2012.02.06 - 09, LeCosPA, NTU, Taiwan)
Emir Gumrukcuoglu
Self-accelerating Universe in Nonlinear Massive Gravity
The 5th GRB Workshop(2012.02.06 - 08, Tokyo Inst Tech, Tokyo)
Keiichi Maeda
GRB-SN Connection
Seminar at JPL(2012.02.06, JPL, Pasadena)
Masahiro Takada
SuMIRe HSC/PFS projects
Geometry/Topology Seminar(2012.02.08, Univ Southern Cal, Los Angeles)
Changzheng Li
Classical aspects of the quantum cohomology of flag
varieties
Geometry Seminar(2012.02.09, UCLA, Los Angeles)
Changzheng Li
Classical aspects of quantum cohomology of flag varieties
Representation theory on p-adic algebraic groups(2012.02.12 - 17, Yokohama National Univ)
Satoshi Kondo
L-factor and epsilon factor
Growing black holes in COSMOS(2012.02.13 - 22, IPMU)
Masayuki Tanaka
A new method to identify AGNs and the nature of lowluminosity AGNs
Seminar at Amsterdam Univ
(2012.02.13, Amsterdam)
Tadashi Takayanagi
Holographic Fermi Surfaces and Entanglement Entropy
The 7th Kagoshima Algebra-Analysis-Geometry Seminar(2012.02.14 - 17, Kagoshima Univ, Kagoshima, Japan)
Christian Schnell
Cohomology of holonomic and constructible complexes on
abelian varieties
Seminar at IIA(2012.02.17, Indian Inst Astrophys, Bangalore, India)
Keiichi Maeda
Studying Nearby Type Ia Supernovae and Future
Cosmological Applications

Workshop “Integralble systems, random matrices, algebraic
geometry and geometric invariants”(2012.02.20 - 22, Steklov Inst, Moscow)
Satoshi Kondo
Mirahoric representations and the local L-factor
Algebraic Geometry Seminar(2012.02.20, Texas A&M Univ, College Station, Texas)
Changzheng Li
Quantum Pieri rules for tautological subbundles over
symplectic Grassmannians
Workshop on Particle physics & cosmology in Toyama(2012.02.20 - 21, Toyama univ, Japan)
Shigeki Matsumoto
The GeV-scale dark matter with B-L asymmetry
ILC detector meeting(2012.02.24, KEK)
Shigeki Matsumoto
New Physics beyond the SM in light of recent LHC data
Subaru Users Meeting FY2011(2012.02.28 - 03.01, NAOJ, Mitaka)
Masamune Oguri
Precise measurement of dark matter distribution withstrong and weak gravitational lensing
Masahiro Takada
PFS Science WG activities
Masayuki Tanaka
Deep near-IR spectroscopy of high-z groups of galaxies
Asia Pacific School/Workshop on Cosmology andGravitation(2012.03.01 - 04, YITP, Kyoto)
A. Emir Gumrukcuoglu
Cosmological perturbations in nonlinear massive gravity
Shinshyu Winter School(2012.03.02 - 05, Shiga, Nagano, Japan)
Shigeki MatsumotoLecture on Dark Matter Phenomenology
KEK Theory Workshop 2012(2012.03.05 - 07, KEK)
Tadashi Takayanagi
Structure of Spacetime and Quantum Entanglement
Workshop on algebraic geometry and the theory of motives(2012.03.08 - 09, Tohoku Univ)
Satoshi Kondo
On the rational K2 of Drinfeld modular curves
Branching Laws
(2012.03.11 - 31, Inst Math Sci, Singapore)
Toshiyuki Kobayashi
Finite Multiplicity Theorems and Real Spherical Varieties

Conference Talks

Particle and Cosmology Group Seminar(2011.12.01, Tohoku Univ, Sendai)
John Kehayias,
Discreet R-Symmetries and Generalized Gaugino
Condensation (and Three Generations)

IAU symposium 279: Death of Massive Stars(2012.03.12 - 16, Nikko, Japan)
Keiichi Maeda
Asymmetries in Supernovae
Low Dimensional Topology and Number Theory IV(2012.03.12 - 15, Kyushu Univ)
Toshitake Kohno
Quantum and homological representations of braid groups
Fables Geometry(2012.03.19 - 23, Univ Geneva, Switzerland)
Sergey Galkin
Reflecting Fano, 1: work of Fano, Iskovskikh, Mori,
Mukai, Shokurov, ...
Reflecting Fano, 2: A-model
Reflecting Fano, 3: mirror symmetry

IPMU Annual Report 201167

New Physics beyond the Standard Model(2012.03.19 - 23, YITP, U. of Kyoto)
Shigeki Matsumoto
Summary on non-SUSY scenarios
Motivic structures on quantum cohomology: progress reports(2012.03.23 - 28, MPI, Bonn)
Duco van Straten, Hiroshi Iritani, Sergey Galkin
Gamma conjectures and recovering topology, 3:
Conjecture O
JPS annual meeting(2012.03.24, Kwansei Gakuin Univ)
Masahiro Takada
Exploring dark energy with SuMIRe HSC/PFS projects
Shigeki Matsumoto
The GeV-scale dark matter with B-L asymmetry
Algebra seminar(2012.03.28, Michigan State Univ)
Changzheng Li
Classical aspects of quantum cohomology of flag varieties

Conference Talks

Hodge theoretic aspects of mirror symmetry(2012.03.29 - 31, Johannes-Gutenberg-Univ, Mainz)
Sergey Galkin
Exceptional non-commutative Hodge structures andDiophantine approximations

68

IPMU Annual Report 2011

IPMU Annual Report 201169

(This list includes principal investigators and affiliate staff.)

JFY201170

IPMU Annual Report 2011

Toshifumi Yamada, KEK (Japan), Particle Theory 05/3006/02

Yoichi Kazama, U Tokyo (Japan), Particle Theory 07/0507/05

Yasuhiro Yamamoto, KEK (Japan), Particle Theory 05/3006/02

Kimitake Hayasaki, Kyoto U (Japan), Astrophysics 07/0707/07

Masato Yamanaka, KEK (Japan), Particle Theory 05/3006/02

Yoichi Ohyama, ASIAA (Taiwan), Astronomy 07/07-07/13

Sachiko Kuroyanagi, U Tokyo ICRR (Japan), Cosmology
05/30-06/02

Shiang-Yu Wang, ASIAA (Taiwan), Astronomy 07/10-07/12
Paul Ho, ASIAA (Taiwan), Astronomy 07/10-07/14

Serguey Petcov, SISSA (Italy), Particle Theory 03/0104/18

Kentaroh Yoshida, Kyoto U (Japan), Particle Theory
05/23-05/27

Ken Mawatari, Tohoku U (Japan) Astrophysics 03/2304/03

Io Kawaguchi, Kyoto U (Japan), Particle Theory 05/2305/27

Wataru Kasai, Tohoku U (Japan), Astronomy 03/2504/20

Adam Amara, ETH Zurich (Switzerland), Cosmology
05/24-05/28

Eibun Senaha, NCTS (Taiwan), High Energy Physics
03/29-04/04

Masao Sako, U Pennsylvania (USA), Cosmology 05/2405/25

Raphael Ponge, U Tokyo (Japan), Mathematics 04/0108/31

Junichi Tanaka, U Tokyo ICEPP (Japan), High Energy
Physics 05/25-05/25

Norimi Yokozaki, U Tokyo (Japan), Particle Theory
04/06-04/06

Edwin Turner, Princeton U (USA), Astrophysics 05/2606/30

Masahiro Futaki, U Tokyo (Japan), Mathematics 04/0604/06

Sachiko Tsuruta, Montana State U (USA), Astrophysics
05/27-06/01

Kazuo Hosomichi, Kyoto U (Japan), Particle Theory
04/11-04/13

Jacob Bourjaily, Princeton U (USA), Particle Theory
05/28-06/05

Daisuke Nagai, Yale U (USA), Cosmology 06/07-06/09

Nobuo Arimoto, NAOJ (Japan), Astronomy 07/11-07/13

Keisuke Izumi, U Tokyo (Japan), Cosmology 04/1104/11, 04/18-04/27

Alexander Kusenko, UCLA (USA), Particle Theory
05/29-06/04

Michael Smy, UC Irvine (USA), Neutrino Physics 06/0806/18

Hideki Takami, NAOJ Hawaii (USA), Astronomy 07/1107/13

Yoshitaka Hatta, U Tsukuba (Japan), Particle Theory
04/20-04/20

Graciela Gelmini, UCLA (USA), Astroparticle Physics
05/29-06/02

Hiroshi Isono, TIFR (India), String Theory 06/09-06/09

Yasushi Suto, U Tokyo ICEPP (Japan), Cosmology 07/1107/13

Motoko Kotani, Tohoku U (Japan), Mathematics 04/2104/22

Kim Griest, UC San Diego (USA), Astroparticle Physics
05/29-06/04

Tadashi Ishibe, Hiroshima U (Japan), Mathematics
04/23-04/24

Michael Loewenstein, NASA/GSFC (USA), Astronomy
05/29-06/04

Kazunobu Maruyoshi, SISSA (Italy), Particle Theory
04/25-04/28

Fuminobu Takahashi, Tohoku U (Japan), Particle
Theory 05/29-06/02

Tadashi Ishibe, Hiroshima U (Japan), Mathematics
04/30-05/01

Douglas Spolyar, Fermilab (USA), Astroparticle Physics
05/29-06/04

Brice Menard, CITA (Canada), Astrophysics 05/0508/12

Masahito Yamazaki, Princeton U (USA), String Theory
05/29-06/01

Massimo Bianchi, INFN (Italy), String Theory 05/1005/20

Shiu-Hang (Herman) Lee, Kyoto U (Japan),
Astrophysics 05/29-06/04

Gustavo Dopke, Heidelberg U (Germany), Astronomy
05/11-05/19

Marcos Valdes, SNS Pisa (Italy), Astrophysics 05/2906/30

Tadashi Ishibe, Hiroshima U (Japan), Mathematics
05/14-05/15

Jan de Boer, U Amsterdam (Netherlands), String Theory
05/30-06/01

Sanshiro Enomoto, U Washington (USA), Neutrino
Physics 05/16-05/25

Ian-Woo Kim, U Michigan (USA), Particle Theory
05/30-06/01

Jiro Soda, Kyoto U (Japan), Cosmology 06/28-06/29

Takahiro Tanaka, Kyoto U (Japan), Cosmology 05/1705/18

Shingo Hirano, U Tokyo (Japan), Astronomy 05/3006/02

Morimitsu Tanimoto, Niigata U (Japan), Particle Theory
06/29-06/30

Yasunobu Uchiyama, SLAC (USA), Astroparticle
Physics 05/18-05/18

Masahiro Ibe, U Tokyo ICRR (Japan), Particle Theory
05/30-06/02

Yusuke Shimizu, Niigata U (Japan), Particle Theory 06/2906/30

Tadashi Ishibe, Hiroshima U (Japan), Mathematics
05/21-05/24

Motohiko Kusakabe, U Tokyo ICRR (Japan), Particle
Theory 05/30-06/02

Takamitsu Tanaka, Columbia U (USA), Astrophysics 07/0407/07

Debajyoti Choudhury, U Delhi (India), Particle Theory
05/21-06/21

Ken’ichi Saikawa, U Tokyo ICRR (Japan), Particle
Theory 05/30-06/02

Ta-Shen Tai, RIKEN (Japan), Particle Theory 07/04-07/06

Satoshi Shirai, KEK (Japan), Particle Theory 05/30-06/02

Hung-Hsu Ling, ASIAA (Taiwan), Astronomy 07/10-07/14

Katsushi Arisaka, UCLA (USA), High Energy Physics 05/3106/01

James Gunn, Princeton U (USA), Astrophysics 07/10-07/13

Takahiro Sumi, Osaka U (Japan), Astroparticle Physics
05/31-06/02
Kazunori Kohri, KEK (Japan), Cosmology 05/31-06/01
Eiichiro Komatsu, U Texas (USA), Cosmology 06/01-07/31
Alexander Vikman, CERN (Switzerland), Cosmology 06/0106/09
David Spergel, Princeton U (USA), Cosmology 06/04-06/18
Murray Brightman, MPI for Extraterrestrial Phys (Germany),
Astrophysics 06/06-06/08

Shogo Masaki, Nagoya U (Japan), Cosmology 06/09-06/10
Sachiko Tsuruta, Montana State U (USA), Astrophysics
06/13-06/22
Yu Nakayama, Caltech (USA), String Theory 06/13-06/20
Brian Fujikawa, LBL (USA), Neutrino Physics 06/16-07/12
Karsten Heeger, U Wisconsin Madison (USA), Neutrino
Physics 06/17-06/25
Martin Schnabl, Inst Phys AS CR (Czech), String Theory
06/20-06/20
Yoshio Sano, National Inst Informatics (Japan), Mathematics
06/21-06/21
Masahito Ueda, U Tokyo (Japan), Condensed Matter Phys
06/22-06/22

Wako Aoki, NAOJ (Japan), Astronomy 07/11-07/13
Toshihiro Kawaguchi, U Tsukuba (Japan), Astrophysics
07/11-07/13
Richard Ellis, Caltech (USA), Astronomy 07/11-07/13
Michael Seiffert, NASA JPL/Caltech (USA), Astronomy
07/11-07/13
Olivier Le Fevre, LAM (France), Astronomy 07/11-07/13
Jean-Paul Kneib, OAMP (France), Astronomy 07/11-07/13
Laerte Sodre, U Sao Paulo (Brazil), Astronomy 07/11-07/13

Tohru Nagao, Kyoto U (Japan), Astronomy 07/11-07/13
Issha Kayo, Toho U (Japan), Astrophysics 07/11-07/13
Masahiko Kimura, NAOJ Hawaii (USA), Astronomy 07/1107/13
Kimihiko Nakajima, U Tokyo (Japan), Astronomy 07/1107/13
Masami Ouchi, U Tokyo ICRR (Japan), Astronomy 07/1107/13
Naruhisa Takato, NAOJ Hawaii (USA), Astronomy 07/1107/13
Akitoshi Ueda, NAOJ (Japan), Astronomy 07/11-07/13
Yosuke Imamura, Titech (Japan), String Theory 07/12-07/12

Stuart Freedman, UC Berkeley (USA), Neutrino Physics
06/24-08/02

Clifford Cheung, UC Berkeley (USA), Particle Theory 07/1607/23

Anzhong Wang, Baylor U (USA), Cosmology 06/26-07/24

Tadashi Ishibe, Hiroshima U (Japan), Mathematics 07/2207/23

Visitors

11 Visitors

David R. Morrison, UC Santa Barbara (USA), Mathematics
07/24-07/27
John Ellis, CERN (Switzerland), Particle Theory 07/24-07/27
Roberto Peccei, UCLA (USA), Particle Theory 07/25-07/27
Steven Kahn, SLAC (USA), Cosmology 07/25-07/27
Yuichiro Nakai, Kyoto U (Japan), High Energy Physics
07/26-08/16

IPMU Annual Report 201171

Torbjoern Sjoestrand, Lund U (Sweden), Particle Theory
09/04-09/10

Frank Krauss, IPPP Durham U (USA), Particle Theory
09/05-09/10

Yoichi Tsuchiya, U Tokyo (Japan), Particle Theory 07/2708/12

Claude Duhr, Durham U (UK), Particle Theory 09/04-09/09

David Grellscheid, Durham U (UK), Particle Theory 09/0509/10

Jean Coupon, Tohoku U (Japan), Astronomy 07/28-07/30

Sanshiro Enomoto, U Washington (USA), Neutrino Physics
09/04-09/07

Tatsuma Nishioka, Princeton U (USA), String Theory 07/3108/21

Clara Hernandez, Inst Fisica Teorica UAM/CSIC (Italy),High Energy Physics 09/04-09/11

Misao Sasaki, Kyoto U (Japan), Cosmology 08/01-08/05

Satyanarayan Mukhopadhyay, Harish-Chandra Res Inst
(India), High Energy Physics 09/04-09/11

Reiko Nakajima, IEU Ewha Womans U (Korea), Astrophysics
08/02-08/26
Hung-Hsu Ling, ASIAA (Taiwan), Astronomy 08/02-09/23
Jock McOrist, U Cambridge (UK), String Theory 08/1208/16
Seong Chan Park, Chonnam National U (Korea), Particle
Theory 08/12-08/26

Subhadeep Mondal, Indian Assoc Cultivation Science (India),High Energy Physics 09/04-09/10
Takaaki Nomura, NCU (Taiwan), Particle Theory 09/0409/11
Yi-Fan Lin, NCU (Taiwan), High Energy Physics 09/0409/09

Kentaro Mawatari, Vrije Univ Brussels (Belgium), Particle
Theory 09/05-09/10
Manami Hashi, U Tokyo (Japan), Particle Theory 09/0509/08
Junya Nakamura, KEK (Japan), High Energy Physics 09/0509/10
Noppadol Mekareeya, MPI Phys (Germany), String Theory
09/05-09/09
Shin Nakamura, Kyoto U (Japan), Particle Theory 09/0609/08
Serguey Petcov, SISSA (Italy), Particle Theory 09/08-09/24

Edwin Turner, Princeton U (USA), Astrophysics 10/14-11/02
Tilman Troster, ETH Zurich (Switzerland), String Theory
10/17-2012/03/24
Amanda Bauer, Australian Astron Obs (Australia),
Astronomy 10/20-10/20
Masahiro Komatsu, Nagoya U (Japan), Particle Theory
10/20-10/20
Tadashi Ishibe, Hiroshima U (Japan), Mathematics 10/2010/22
Patrick Decowski, Nikhef (Netherlands), High Energy
Physics 10/24-11/01
Kaoru Ono, Hokkaido U (Japan), Mathematics 10/24-10/24
Peng Zhao, U Cambridge (UK), Particle Theory 10/24-10/30
Noriyuki Abe, Hokkaido U (Japan), Mathematics 10/2610/28

Raman Khurana, Saha Inst (India), High Energy Physics
09/04-09/11

Tristan Smith, UC Berkeley (USA), Cosmology 09/082012/02/01

Ilya Zhdanovskiy, MITP (Russia), Mathematics 08/13-09/01

Bhawna Gomber, Saha Inst (India), High Energy Physics
09/04-09/11

Daxian Su, CERN (Switzerland), High Energy Physics 09/0809/11

Suet Ying Mak, U Southern Cal (USA), Cosmology 08/1408/17

Warintorn Sreethawong, U Oklahoma (USA), Particle
Theory 09/04-09/17

Priyotosh Bandyopadhyay, KIAS (Korea), Particle Theory
09/11-09/17

Anton Mellit, U Cologne (Germany), Mathematics 10/2911/05

Thomas Greif, MPI Astrophys (Germany), Astrophysics
08/20-09/09

Mukesh Kumar, U Delhi (India), Particle Theory 09/0409/11

Marcos Valdes, SNS Pisa (Italy), Astrophysics 09/14-09/23

Pawel Kampczyk, ETH Zurich (Switzerland), Cosmology
10/29-11/05

Kathryn Zurek, U Michigan (USA), Particle Theory 08/2108/24

Rashidul Islam, U Delhi (India), High Energy Physics 09/0409/11

Kenichi Konishi, U Pisa (Italy), Particle Theory 08/22-09/02

Fuminobu Takahashi, Tohoku U (Japan), Particle Theory
09/04-09/11

Christopher Walter, Duke U (USA), Neutrino Physics 08/1308/26

Yasuaki Hikida, Keio U (Japan), String Theory 08/22-09/02
Kate Scholberg, Duke U (USA), Neutrino Physics 08/2508/31

Kazuya Mochizuki, U Tsukuba (Japan), High Energy Physics
09/04-09/10

Tzu Ching Chang, ASIAA (Taiwan), Astronomy 09/2009/22
Marco Peloso, U Minnesota (USA), Particle Theory 09/2109/26
Sudeep Das, LBL (USA), Cosmology 09/22-09/30
Michael Strauss, Princeton U (USA), Astronomy 09/2410/03

Johannes Andersen, U Copenhagen (Denmark), Astrophysics
10/27-10/29
Hung-Hsu Ling, ASIAA (Taiwan), Astronomy 10/28-11/14

Emanuel Scheidegger, U Freiburg (Germany), Mathematics
10/29-11/06
Vadim Vologodskiy, U Oregon (USA), Mathematics 10/3011/06
Bumsig Kim, KIAS (Korea), Mathematics 10/30-11/05
Ionut Ciocan-Fontanine, U Minnesota (USA), Mathematics
10/30-11/04

Jaewon Song, Caltech (USA), String Theory 08/26-09/09

Yoshitaro Takaesu, KEK (Japan), Particle Theory 09/0409/10

Jason Rhodes, NASA JPL/Caltech (USA), Astrophysics
08/31-09/21

Yuto Komori, U Tokyo (Japan), High Energy Physics 09/0409/10

Steven Bickerton, Princeton U (USA), Astronomy 09/2611/18

Olivier Dore, NASA JPL/Caltech (USA), Cosmology 08/3109/24

Masaki Asano, U Tokyo ICRR (Japan), Particle Theory
09/04-09/10

Robert Myers, Perimeter Inst (Canada), String Theory 09/2709/29

Seo Ree Park, Seoul Natl U (Korea), Mathematics 10/3011/07

Hendrik Hoeth, IPPP Durham U (USA), Particle Theory
09/02-09/12

Oliver Hall, IPPP Durham U (USA), High Energy Physics
09/04-09/11

Richard Ellis, Caltech (USA), Astronomy 10/02-10/08

Scott Tremaine, Princeton U (USA), Astrophysics 10/3111/11

Bryan Webber, U Cambridge (UK), Particle Theory 09/0309/30

Naotoshi Okamura, U Yamanashi (Japan), High Energy
Physics 09/04-09/10

Rikkert Frederix, UZH (Switzerland), Particle Theory
09/03-09/10

Yao Qin, Peking U (China), High Energy Physics 09/0409/10

Alexander Kusenko, UCLA (USA), Particle Theory 10/0412/01

Andy Buckley, U Edinburgh (UK), High Energy Physics
09/03-09/10

Namseok Yoo, Konkuk U (Korea), High Energy Physics
09/04-09/11

Takeshi Morita, U Crete (Greece), String Theory 10/0410/04

Shuo Yang, Peking U (China), High Energy Physics 09/0309/11

Grisha Kirilin, KEK (Japan), High Energy Physics 09/0409/10

Shin’ichiro Ando, U Amsterdam (Netherlands), Cosmology
10/10-10/12

Yoichi Ninomiya, U Tokyo ICEPP (Japan), High Energy
Physics 09/03-09/11

Linlin Zhang, Peking U (China), High Energy Physics 09/0409/11

Jean Coupon, Tohoku U (Japan), Astronomy 10/11-10/12

Pavel Ruzicka, Inst Phys AS CR (Czech), High Energy
Physics 09/03-09/12

Ken-ichi Okumura, Kyushu U (Japan), Particle Theory
09/04-09/10

Gavin Salam, CERN (Switzerland), Particle Theory 09/0409/07

Soyoung Shim, Konkuk U (Korea), High Energy Physics
09/04-09/11

Robert Lupton, Princeton U (USA), Cosmology 09/24-10/03

Hung-Hsu Ling, ASIAA (Taiwan), Astronomy 10/02-10/18
Chiaki Hikage, Princeton U (USA), Astronomy 10/03-10/07

Peter Behroozi, Stanford U (USA), Cosmology 10/12-10/14

David Favero, U Vienna (Austria), Mathematics 10/30-11/08
Colin Diemer, U Miami (USA), Mathematics 10/30-11/08

Alexander Efimov, Steklov Inst (Russia), Mathematics 10/3111/14
Gabriel Kerr, U Miami (USA), Mathematics 10/31-11/04

Visitors

Makoto Gonokami, U Tokyo QPEC (Japan), Quantum Optics
07/26-07/26

Kana Ando, Chiba U (Japan), Mathematics 10/31-11/04
Hiroshi Iritani, Kyoto U (Japan), Mathematics 11/01-11/04
Helge Ruddat, U Mainz (Germany), Mathematics 11/01-11/05
Alexey Rosly, ITEP (Russia), Mathematics 11/01-11/30
Issha Kayo, Toho U (Japan), Astrophysics 11/01-11/01

Issha Kayo, Toho U (Japan), Astrophysics 10/12-10/12

Ludmil Katzarkov, U Vienna (Austria), Mathematics 11/0211/07

Norihiro Iizuka, CERN (Switzerland), String Theory 10/1310/15

Paolo Cascini, Imperial Coll London (UK), Mathematics
11/02-11/06

Bunyo Hatsukade, Kyoto U (Japan), Astronomy 10/13-10/14

72

IPMU Annual Report 2011

IPMU Annual Report 201173

Masayuki Yamanaka, Hiroshima U (Japan), Astronomy
11/23-11/24

Naoyuki Tamura, NAOJ Hawaii (USA), Astronomy 01/0501/13

Konstantin Shramov, Steklov Inst (Russia), Mathematics
11/05-11/15

Hiroyuki Hirashita, ASIAA (Taiwan), Astronomy 11/2411/24

Philippe Amram, LAM (France), Astronomy 01/06-01/14

Ivan Cheltsov, U Edinburgh (UK), Mathematics 11/05-11/10

Brice Menard, Johns Hopkins U (USA), Astrophysics 11/2812/09

Jean-Philippe Uzan, IAP (France), Cosmology 11/07-11/18
Brian Fujikawa, LBL (USA), Neutrino Physics 11/07-11/14
Valeri Frolov, U Alberta (Canada), Cosmology 11/07-11/10
Issha Kayo, Toho U (Japan), Astrophysics 11/08-11/08
Yen-Ting Lin, ASIAA (Taiwan), Astrophysics 11/09-11/11
Tadashi Ishibe, Hiroshima U (Japan), Mathematics 11/1111/13
Claire Lackner, Princeton U (USA), Astrophysics 11/11-11/18
Fedor Smirnov, LPTHE (France), Mathematics 11/13-11/20
Timothy Logvinenko, U Warwick (UK), Mathematics 11/1311/17
Richard Hill, U Chicago (USA), Particle Theory 11/13-11/15
Jun Zhang, U Texas (USA), Cosmology 11/13-11/19
Jens Chluba, U Toronto (Canada), Astronomy 11/13-11/22
Michael Smy, UC Irvine (USA), Neutrino Physics 11/1411/20

Shinji Hirano, Nagoya U (Japan), String Theory 11/29-11/29
Alexei Smirnov, ICTP (Italy), Particle Theory 11/30-11/30
Andrei Pajitnov, U Nantes (France), Mathematics 12/0112/01
Issha Kayo, Toho U (Japan), Astrophysics /12/02-12/02
Tadashi Ishibe, Hiroshima U (Japan), Mathematics 12/0212/04
Christopher Michael Hirata, Caltech (USA), Astronomy
12/04-12/09
Fanky Wong, Chinese Univ Hong Kong (Hong Kong),
Cosmology 12/04-12/10
Yasuaki Hikida, Keio U (Japan), String Theory 12/06-12/06
Naoyuki Tamura, NAOJ Hawaii (USA), Astronomy 12/0712/08
Shin Mineshige, Kyoto U (Japan), Astrophysics 12/09-12/09

Adam Burrows, Princeton U (USA), Astronomy 11/15-11/15

Toshifumi Futamase, Tohoku U (Japan), Cosmology 12/1112/14

Yongzhong Qian, U Minnesota (USA), Astronomy 11/1511/15

Yuri Efremenko, U Tennessee (USA), Neutrino Physics
12/12-12/21

James Lattimer, SUNY Stony Brook (USA), Astronomy
11/15-11/15

Masaki Shigemori, Nagoya U KMI (Japan), Particle Theory
12/12-12/12

Alexis Finoguenov, MPI Extraterrestrial Phys (Germany),
Cosmology 11/16-11/25

Kiyoshi Takeuchi, U Tsukuba (Japan), Mathematics 12/1312/13

Francesco Miniati, ETH Zurich (Switzerland), Astrophysics
11/16-11/24

Adam Falkowski, Univ Paris-Sud (France), Particle Theory
12/15-12/21

Christopher Walter, Duke U (USA), Neutrino Physics 11/1611/20

Thomas Flacke, U Wurzburg (Germany), Particle Theory
12/15-12/16

Dmitri Panov, King’s Coll London (UK), Mathematics 11/1711/30

Tadashi Ishibe, Hiroshima U (Japan), Mathematics 12/1612/18

Shinya Wanajo, Tech U Munich (Germany), Astronomy
11/18-12/02

Tatsuma Nishioka, Princeton U (USA), String Theory 12/192012/01/17

Stuart Sim, Australian Natl U (Australia), Astronomy 11/1911/30

Daniel Brattan, U Durham (UK), String Theory 12/19-12/22

Sharon Rapoport, Australian Natl U (Australia), Cosmology
11/19-11/30
Yanki Lekili, Kings Coll Cambridge (UK), Mathematics
11/19-11/19
Hung-Hsu Ling, ASIAA (Taiwan), Astronomy 11/21-11/30
James Gunn, Princeton U (USA), Astrophysics 11/21-12/15
Akira Shudo, Tokyo Met U (Japan), Mathematics 11/22-11/22
Omar Benvenuto, National Univ La Plata (Spain),
Astrophysics 11/23-12/11

74

Jean Coupon, Tohoku U (Japan), Astronomy 11/28-11/30

IPMU Annual Report 2011

Shin Mineshige, Kyoto U (Japan), Astrophysics 12/20-12/20
Satoshi Shirai, UC Berkeley (USA), Particle Theory 12/2112/27

Ligia Souza De Oliveira, LNA (Brazil), Astronomy 01/0601/14
Antonio De Oliveira, LNA (Brazil), Astronomy 01/06-01/14
Tania Pereira Dominici, LNA (Brazil), Astronomy 01/0601/14
Lucas Souza Marrara, LNA (Brazil), Astronomy 01/0601/14
Charles L. Bennett, Johns Hopkins U (USA), Astronomy
01/06-01/12
Brice Menard, Johns Hopkins U (USA), Astrophysics 01/0601/19

Daisuke Kawata, U Coll London (UK), Astronomy 01/0701/12
Nora Elisa Chisari, Princeton U (USA), Astronomy 01/0701/14
Mei-Yin Chou, ASIAA (Taiwan), Astronomy 01/07-01/12
Nozomu Tominaga, Konan U (Japan), Astrophysics 01/0701/12
Yusuke Komuro, Tohoku U (Japan), Astronomy 01/07-01/10
Sakurako Okamoto, KIAA Peking U (China), Astronomy
01/07-01/12
Paul Ho, ASIAA (Taiwan), Astronomy 01/07-01/10
Shailesh Lal, Harish-Chandra Res Inst (India), String Theory
01/08-01/21

Naruhisa Takato, NAOJ Hawaii (USA), Astronomy 01/0601/14

Somyadip Thakur, Indian Inst Science (India), String Theory
01/08-01/21

Masahito Yamazaki, Princeton U (USA), String Theory
01/06-01/07

David Spergel, Princeton U (USA), Cosmology 01/08-01/14

Sebastien Peirani, IAP (France), Astronomy 01/06-01/14
James Gunn, Princeton U (USA), Astrophysics 01/07-01/14
Steven Bickerton, Princeton U (USA), Astronomy 01/0701/14
Robert Lupton, Princeton U (USA), Cosmology 01/07-01/14

Richard Ellis, Caltech (USA), Astronomy 01/08-01/11
Tzu Ching Chang, ASIAA (Taiwan), Astronomy 01/08-01/13
Hideki Takami, NAOJ Hawaii (USA), Astronomy 01/0801/09
Toru Yamada, Tohoku U (Japan), Astronomy 01/08-01/09

Michael Strauss, Princeton U (USA), Astronomy 01/07-01/14

Hidetomo Honma, Tohoku U (Japan), Astronomy 01/0801/09

Jenny Greene, Princeton U (USA), Astronomy 01/07-01/10

Narae Hwang, NAOJ (Japan), Astronomy 01/08-01/09

Michael Seiffert, NASA JPL/Caltech (USA), Astronomy
01/07-01/11

Miho Ishigaki, NAOJ (Japan), Astronomy 01/08-01/09

Olivier Dore, NASA JPL/Caltech (USA), Cosmology 01/0701/13
Christopher Michael Hirata, Caltech (USA), Astronomy
01/07-01/12

Ryuichi Takahashi, Hirosaki U (Japan), Astronomy 01/0801/09
Kohei Hayashi, Tohoku U (Japan), Astronomy 01/08-01/11
Issha Kayo, Toho U (Japan), Astrophysics 01/08-01/09

Daniel Stern, NASA JPL/Caltech (USA), Astronomy 01/0701/09

Toshihiro Kawaguchi, U Tsukuba (Japan), Astrophysics
01/08-01/12

Alvise Raccanelli, NASA JPL/Caltech (USA), Astronomy
01/07-01/15

Chiaki Hikage, Nagoya U KMI (Japan), Astronomy 01/0801/09

Luis Raul Webber Abramo, U Sao Paulo (Brazil),
Cosmology 01/07-01/13

Masashi Chiba, Tohoku U (Japan), Astronomy 01/08-01/09

Claudia Lucia Mendes De Oliveira, U Sao Paulo (Brazil),
Astronomy 01/07-01/14
Olivier Le Fevre, LAM (France), Astronomy 01/07-01/12
Stephen Smee, Johns Hopkins U (USA), Astronomy 01/0701/13

Bum-Hoon Lee, Sogang U (Korea), String Theory 01/0401/21

Yen-Ting Lin, ASIAA (Taiwan), Astrophysics 01/07-01/12

Yasunori Nomura, UC Berkeley (USA), Particle Theory
01/04-01/05

Yuichi Matsuda, Caltech (USA), Astronomy 01/07-01/13

Rosemary Wyse, Johns Hopkins U (USA), Astronomy 01/0601/13

Misha Verbitsky, HSE National Res Univ (Russia),
Mathematics 12/25-1012/01/29

Satoshi Shirai, UC Berkeley (USA), Particle Theory 01/0401/12

Jean Coupon, Tohoku U (Japan), Astronomy 01/07-01/12

Visitors

Devendra Kumar Sahu, IIAP (France), Astronomy 11/0311/29

Takayuki Maebayashi, Tohoku U (Japan), Astronomy 01/0801/09
Chiaki Kobayashi, U Hertfordshire CAR (UK), Astronomy
01/08-01/13
Satoshi Miyazaki, NAOJ (Japan), Astronomy 01/08-01/09
Hideyuki Kobayashi, NAOJ (Japan), Astronomy 01/08-01/09

Shiang-Yu Wang, ASIAA (Taiwan), Astronomy 01/07-01/12

Dam Thanh Son, U Washington (USA), Particle Theory
01/09-01/16

Yoichi Ohyama, ASIAA (Taiwan), Astronomy 01/07-01/12

Henry Tye, Cornell U (USA), Particle Theory 01/09-01/15

Wei-Hao Wang, ASIAA (Taiwan), Astronomy 01/07-01/12

Xi Yin, Harvard U (USA), String Theory 01/09-01/21

IPMU Annual Report 201175

Zhao-Long Wang, KIAS (Korea), String Theory 01/09-01/21

Daigo Honda, U Tokyo (Japan), Particle Theory 01/09-01/21

Jia-ju Zhang, Peking U (China), String Theory 01/09-01/21

Seung-Joo Lee, KIAS (Korea), String Theory 01/09-01/21

Prabwal Jyoti Phukon, IIT Kanpur (India), String Theory
01/09-01/21

Neil Copland, Sogang U (Korea), String Theory 01/09-01/21

Yuki Yokokura, Kyoto U (Japan), Particle Theory 01/0901/21

Jiang Long, Peking U (China), String Theory 01/09-01/21
Ekapong Hirunsirisawat, Chulalongkorn U (Thailand),Particle Theory 01/09-01/21
Shankhadeep Chakrabortty, IOP Bhubaneswar (India),
String Theory 01/09-01/26
Abhishek Kumar Singh, U Delhi (India), High Energy
Physics 01/09-01/21

Hee-Cheol Kim, KIAS (Korea), String Theory 01/09-01/21
Shailesh Kulkarni, Sogang U (Korea), String Theory 01/0901/21
Seo Yunseok, Sogang U (Korea), String Theory 01/09-01/21
Ik Jae Shin, POSTECH (Korea), Particle Theory 01/09-01/21

Shou-Huang Dai, NTNU (Taiwan), Particle Theory 01/0901/21

Jungmin Kim, Seoul Natl U (Korea), String Theory 01/0901/21

Chi-Ming Chang, Harvard U (USA), Particle Theory 01/0901/21

Kim Heeyeon, Seoul Natl U (Korea), Particle Theory 01/0901/21

Chen-Pin Yeh, NTU (Taiwan), High Energy Physics 01/0901/16

Sun Young Lee, Yonsei U (Korea), Particle Theory 01/0901/21

Nilanjan Sircar, TIFR (India), Condensed Matter Phys
01/09-01/21

Jaehoon Jeong, Yonsei U (Korea), Particle Theory 01/0901/21

Prithvi Narayan Padar, TIFR (India), Condensed Matter
Phys 01/09-01/21

Youngsub Yoon, Seoul Natl U (Korea), Particle Theory
01/09-01/21

Tarun Sharma, TIFR (India), Particle Theory 01/09-01/21

Hyungchul Kim, POSTECH (Korea), Particle Theory 01/0901/21

Samrat Bhowmick, IOP Bhubaneswar (India), String Theory
01/09-01/22
Bogdan Stoica, Caltech (USA), High Energy Physics 01/0901/21
Masao Hayashi, NAOJ (Japan), Astronomy 01/09-01/09
Hiroshi Isono, TIFR (India), String Theory 01/09-01/21

Kyung-Jae Park, POSTECH (Korea), Particle Theory 01/0901/21
Jaewon Kim, Seoul Natl U (Korea), Particle Theory 01/0901/21
Sojin Lee, Yonsei U (Korea), Particle Theory 01/09-01/21

Tomohisa Takimi, TIFR (India), Particle Theory 01/09-01/21

Chiung Hwang, POSTECH (Korea), Particle Theory 01/0901/21

Binata Panda, Harish-Chandra Res Inst (India), String
Theory 01/09-01/21

Jung Hun Lee, Kyung Hee U (Korea), Particle Theory 01/0901/21

Souvik Banerjee, IOP Bhubaneswar (India), String Theory
01/09-01/21

Hideo Kodama, KEK (Japan), Cosmology 01/09-01/21

Shuhei Sasa, Tohoku U (Japan), Particle Theory 01/09-01/21
Daisuke Yokoyama, Titech (Japan), Particle Theory 01/0901/21
Yusuke Kimura, Kyoto U (Japan), Particle Theory 01/0901/19
Koichi Nagasaki, Osaka U (Japan), Particle Theory 01/0901/21
Io Kawaguchi, Kyoto U (Japan), Particle Theory 01/09-01/21
Yoshinori Honma, Sokendai (Japan), Particle Theory 01/0901/21

Kimyeong Lee, KIAS (Korea), String Theory 01/14-01/20

Hong Zhang, U Tokyo (Japan), Particle Theory 01/09-01/21

Atsushi Ogasahara, Kyoto U (Japan), Particle Theory 01/1401/19

Junya Nakamura, KEK (Japan), High Energy Physics 01/0901/21

Ashoke Sen, Harish-Chandra Res Inst (India), String Theory
01/15-01/20

Junsnag Park, U Tsukuba (Japan), Particle Theory 01/0901/21

Katsuo Tokushuku, KEK (Japan), High Energy Physics
01/15-01/16

Takayuki Enari, Nihon U (Japan), Particle Theory 01/0901/21

Kenta Murase, Kyoto U (Japan), Particle Theory 01/15-01/20

Nariaki Matsumiya, U Tokyo (Japan), Particle Theory 01/0901/21
Yuichi Fukazawa, Chuo U (Japan), Particle Theory 01/0901/21

Reinabelle Reyes, KICP (USA), Astronomy 01/18-02/04

Chi-Hsien Yeh, NTU (Taiwan), Particle Theory 01/09-01/21

Edwin Turner, Princeton U (USA), Astrophysics 01/18-02/04

Ying-Hsuan Lin, Harvard U (USA), Particle Theory 01/0901/21

Alexander Voronov, U Minnesota (USA), Mathematics
01/19-03/03

Albrecht Klemm, U Bonn (Germany), Mathematical Physics
01/10-01/20

Dimitrios Psaltis, U Arizona (USA), Cosmology 01/21-01/27

Sang-Jin Sin, Hanyang U (Korea), String Theory 01/10-01/20

Hiroyuki Kitamoto, Soukendai (Japan), Particle Theory
01/09-01/21

Miao Li, Chinese Acad Sci (China), String Theory 01/1001/20

Masazumi Honda, KEK (Japan), Particle Theory 01/0901/21

Roger Smith, Caltech (USA), Astronomy 01/10-01/15

Jaemo Park, POSTECH (Korea), String Theory 01/09-01/21

IPMU Annual Report 2011

Shota Komatsu, U Tokyo (Japan), Particle Theory 01/0901/21

Hiroshi Yoda, Nagoya U (Japan), Particle Theory 01/16-01/20

Pei-Hua Liu, NTNU (Taiwan), Particle Theory 01/09-01/21

Sen Zhang, OIQP (Japan), Particle Theory 01/09-01/21

Yuto Ito, U Tokyo (Japan), Particle Theory 01/09-01/19

Shoichi Ichinose, U Shizuoka (Japan), Particle Theory 01/1601/19

Takashi Kobayashi, KEK (Japan), High Energy Physics
01/18-01/19

Takuya Okuda, U Tokyo (Japan), String Theory 01/10-01/20

Chanyong Park, Sogang U (Korea), Particle Theory 01/0901/21

Masaki Ando, Kyoto U (Japan), Particle Theory 01/16-01/18

Yoshio Matsumoto, Sokendai (Japan), Particle Theory 01/0901/21

Yasuhiro Sekino, OIQP (Japan), String Theory 01/09-01/21

Tomoki Taminato, Kyushu U (Japan), Particle Theory 01/0901/21

Cosimo Bambi, LMU Munich (Germany), Cosmology 01/1202/04

Shoichi Kanno, U Tokyo (Japan), High Energy Physics 01/0901/21

Siddharth Dwivedi, IIT Bombay (India), Particle Theory
01/09-01/21

Corneliu Sochichiu, Sungkyunkwan U (Korea), String
Theory 01/09-01/21

Chang Kee Jung, SUNY Stony Brook (USA), High Energy
Physics 01/11-02/01

Alexander Dolgov, U Ferrara (Italy), Astrophysics 01/1302/12

Yoshihisa Kitazawa, KEK (Japan), Particle Theory 01/0901/21

Shingo Torii, U Tokyo (Japan), Particle Theory 01/09-01/21

Masanori Sato, Nagoya U (Japan), Astrophysics 01/11-01/13

Toshifumi Noumi, U Tokyo (Japan), Particle Theory 01/0901/21

Mansi Dhuria, IIT Roorkee (India), High Energy Physics
01/09-01/21

Seungjoon Hyun, Yonsei U (Korea), String Theory 01/0901/21

Tomotake Matsumura, KEK (Japan), Cosmology 01/1101/13

Masahide Shimizu, Hokkaido U (Japan), Particle Theory
01/12-01/17

Matsuo Sato, Hirosaki U (Japan), Particle Theory 01/0901/21

Hai-Qing Zhang, Chinese Acad Sci (China), Particle Theory
01/09-01/19

Yasuo Miake, U Tsukuba (Japan), High Energy Physics 01/1101/12

Kouki Kubo, Kyushu U (Japan), Particle Theory 01/09-01/21

Karthik Inbasekar, IMSc (India), String Theory 01/09-01/21

Arunabha Saha, Harish-Chandra Res Inst (India), Particle
Theory 01/09-01/21

76

Kanghoon Lee, Sogang U (Korea), Particle Theory 01/0901/21

David Braun, NASA JPL/Caltech (USA), Astronomy 01/1001/14

Seok Kim, Seoul Natl U (korea), Particle Theory 01/10-01/20

Soonkeon Nam, Kyung Hee U (Korea), String Theory 01/1001/20
Tohru Nagao, Ehime U (Japan), Astronomy 01/10-01/13
Kenta Matsuoka, Ehime (Japan), Cosmology 01/10-01/13
Susumu Okazawa, Sokendai (Japan), Particle Theory 01/1001/14

Cesar Gomez, Inst Fisica Teorica UAM/CSIC (Spain),
Particle Theory 01/21-01/30
Stefano Camera, CENTRA/IST (Portugal), Cosmology
01/21-01/27

Visitors

Jun Nishimura, KEK (Japan), Particle Theory 01/09-01/14

Alexander Vikman, CERN (Switzerland), Cosmology 01/2201/31
Pedro Ferreira, U Oxford (UK), Cosmology 01/22-01/28
Surjeet Rajendran, Stanford U (USA), Particle Theory
01/22-02/04
Anzhong Wang, Baylor U (USA), Cosmology 01/22-02/04
Amir Aazami, Duke U (USA), Mathematical Physics 01/2201/28
Thomas Sotiriou, SISSA (Italy), Cosmology 01/23-02/03
Rachel Bean, Cornell U (USA), Cosmology 01/23-01/27

IPMU Annual Report 201177

Fabrice Debbasch, ERGA (France), Cosmology 01/23-02/03
Matteo Guainazzi, ESA (France, EU), Astronomy 01/2302/03
Sergey Ketov, Tokyo Met U (USA), Cosmology 01/23-02/03
Tsutomu Kobayashi, Kyoto U (Japan), Cosmology 01/2302/03
Baojiu Li, U Cambridge (UK), Cosmology 01/23-02/03
Walid Majid, NASA JPL/Caltech (USA), Astronomy 01/2302/03
Beth Reid, LBL (USA), Cosmology 01/23-02/02
Yuki Watanabe, U Texas (USA), Cosmology 01/23-02/05
Lucia Aurelia Popa, Inst Space Sci (Romania), Cosmology
01/23-02/03
Yingjie Peng, ETH Zurich (Switzerland), Cosmology 01/2301/27
Tomohiro Abe, Tsinghua U (China), Particle Theory 01/2302/08
Chiaki Hikage, Nagoya U KMI (Japan), Astronomy 01/2301/25
Yanwen Shang, Perimeter Inst (Canada), Particle Theory
01/24-02/01
Aleksey Cherman, U Cambridge (UK), Particle Theory
01/26-01/31
Ben Davison, U Oxford (UK), Mathematics 01/27-02/02
Sergei Blinnikov, ITEP (Russia), Astronomy 01/29-02/11
Elena Sorokina, Sternberg Astro Inst (Russia), Astrophysics
01/29-02/28
Philip Argyres, U Cincinnati (USA), Particle Theory 01/2902/04
Risa Wechsler, Stanford U (USA), Cosmology 01/30-02/03
Wu-yen Chuang, NTU (Taiwan), Mathematics 01/30-02/10
Ken Intriligator, UC San Diego (USA), Particle Theory
02/01-02/05
Yefeng Shen, U Michigan (USA), Mathematics 02/03-06/30
Benjamin Burton, U Queensland (Australia), Mathematics
02/04-02/19
Yuri Prokhorov, MSU (USA), Mathematics 02/08-02/08
Jeremiah Heller, U Western Ontario (Canada), Mathematics
02/08-02/18

Angela Bongiorno, MPI Extraterrestrial Phys, Astronomy
02/11-02/18
Nora Elisa Chisari, Princeton U (USA), Astronomy 02/1102/18
Tadashi Ishibe, Hiroshima U (Japan), Mathematics 02/1202/17
Ivan Marin, U Paris 7 (France), Mathematics 02/12-02/18
Heng Hao, SISSA (Italy), Astronomy 02/12-02/22
Eli Rykoff, SLAC (USA), Cosmology 02/12-02/19

Andreas Schulze, KIAA Peking U (Cina), Astronomy 02/1302/17
Mauricio Cisternas, MPI Astronomy Astronomy 02/1302/22

Ryosuke Itoh, KEK (Japan), High Energy Physics 03/0203/02
Sho Kaneda, Tokyo Met U (Japan), High Energy Physics
03/02-03/02
Kenichi Karatsu, NAOJ (Japan), Astronomy 03/02-03/02

Toshihiro Kawaguchi, U Tsukuba (Japan), Astrophysics
02/13-02/14

Tadashi Kifune, U Tokyo ICRR (Japan), Astrophysics 03/0203/02

Filippo Callegaro, SNS Pisa (Italy), Mathematics 02/1402/28

Nao Suzuki, LBL (USA), Astrophysics 03/02-03/31
Masaaki Kitaguchi, Kyoto U (Japan), Nuclear Physics 03/0203/02

Luis Ho, Carnegie Obs (USA), Astronomy 02/12-02/17

Emanuelle Delucchi, U Bremen (Germany), Mathematics
02/14-03/02

Daniel Masters, Carnegie Obs (USA), Astronomy 02/1202/18

Pawel Kampczyk, ETH Zurich (Switzerland), Cosmology
02/16-02/23

Vincenzo Mainieri, ESO (Germany, Chile), Astronomy
02/12-02/19

David Curtin, Stony Brook U (USA), Particle Theory 02/2002/22

Takamitsu Miyaji, IAUNAM-E (Mexico), Astronomy 02/1202/22

Takeo Higuchi, KEK (Japan), High Energy Physics 02/23-02

Akira Masaike, Kyoto U (Japan), Particle Theory 03/0203/02

Chang Kee Jung, SUNY Stony Brook (USA), High Energy
Physics 02/26-03/30

Tony Pantev, U Pennsylvania (USA), Mathematics 03/0303/10

Masahiro Nozaki, Kyoto U (Japan), Particle Theory 02/2703/17

Stephan Hachinger, INAF Padova (Italy), Astronomy 03/0403/10

Tomoharu Suzuki, U Tokyo (Japan), Astronomy 02/27-02/28

Pyungwon Ko, KIAS (Korea), High Energy Physics 03/0503/07

Ezequiel Treister, U Hawaii (USA), Astronomy 02/12-02/17
Piero Ranalli, INAF Bologna (Italy), Astronomy 02/12-02/23
Brooke Simmons, Yale U (USA), Astrophysics 02/12-02/23
Kenta Matsuoka, Ehime U (Japan), Cosmology 02/12-02/18

Teppei Kitahara, U Tokyo (Japan), Particle Theory 03/0203/02
Ryohei Kobayashi, Nagoya U (Japan), Astrophysics 03/0203/02

Raphael Flauger, IAS/NYU (USA), Cosmology 02/12-02/25

Evgeny Shinder, MPI Mathematics (Germany), Mathematics
02/28-03/09

Tomer Tal, Yale U (USA), Astronomy 02/12-02/20

Naohito Nakasato, U Aizu (Japan), Astrophysics 03/01-03/02

Daniel Allcock, U Texas (USA), Mathematics 02/13-02/18

Veles Oleksandr, U Aizu (Japan), Astrophysics 03/01-03/02

Giovanni Morando, U Padova (Italy), Mathematics 03/0603/08

David Rosario, MPI Extraterrestrial Phys (Germany),
Astronomy 02/13-02/22

Takafumi Suzuki, U Aizu (Japan), Astronomy 03/01-03/02

Dong-han Yeom, Sogang U (Korea), Cosmology 03/07-03/10

Kosuke Nakamura, U Aizu (Japan), Astronomy 03/01-03/02

Nidia Morrell, Carnegie Obs (USA), Astronomy 03/07-03/09

Tsuyoshi Watanabe, U Aizu (Japan), Astronomy 03/01-03/02

Jesper Sollerman, Stockholm U (Sweden), Astronomy 03/0703/11

Jeyhan Kartaltepe, NOAO (USA), Astronomy 02/13-02/22
Mara Salvato, MPI Plasma Phys (Germany), Astronomy
02/13-02/22
Riguccini Laurie, Ehime U (Japan), Astronomy 02/13-02/22

Shohei Aoyama, Nagoya U (Japan), Astrophysics 03/0203/02

Giorgos Leloudas, Stockholm U (Sweden), Astronomy
03/06-03/09

Francesco Taddia, Stockholm U (Sweden), Astronomy
03/07-03/11

Peter Capak, Caltech (USA), Astronomy 02/13-02/22

Jiro Arafune, U Tokyo ICRR (Japan), Particle Theory 03/0203/02

Andrea Comastri, INAF Bologna (Italy), Astronomy 02/1302/24

Katsuhiro Asano, Tokyo Met U (Japan), Particle Theory
03/02-03/02

Masashi Hamanaka, Nagoya U (Japan), Mathematics 03/0803/09

Kazushi Iwasawa, U Barcelona (Spain), Astronomy 02/1302/22

Takao Fukui, Dokkyo U (Japan), Astronomy 03/02-03/02

Anton Chernenko, IKI (Russia), Astronomy 03/11-03/17

Tohru Nagao, Ehime (Japan), Astronomy 02/13-02/22

Sadataka Furui, Teikyo U (Japan), Particle Theory 03/0203/02

Sergey Moiseenko, IKI (Russia), Astronomy 03/11-03/18

Poshak Gandhi, JAXA (Japan), Astronomy 02/13-02/22

Koji Hara, KEK (Japan), High Energy Physics 03/02-03/02

Kevin Schawinski, Yale U (USA), Astronomy 02/13-02/22

Yuna Hattori, Ochanomizu U (Japan), Particle Theory 03/0203/02

Roberto Gilli, INAF Bologna (Italy), Astronomy 02/13-02/19

Seidai Yasuda, Kyoto U (Japan), Mathematics 03/07-03/09

Sayan Chakraborti, TIFR (India), Astronomy 03/12-03/16
Norhasliza Yusof, U Malaya (Malaysia), Astrophysics 03/1203/16
Chao Wu, Chinese Acad Sci (China), Astronomy 03/12-03/16

Hiroyuki Ikeda, Ehime U (Japan), Astronomy 02/13-02/22

Hisaki Hayashi, Nara Womens U (Japan), HighEnergyPhysics 03/02-03/02

Sotiria Fotopoulou, MPI Plasma Phys, Astronomy 02/1302/22

Takeo Higuchi, KEK (Japan), High Energy Physics 03/0203/02

Martin Smith, KIAA Peking U (China), Astronomy 03/1203/15

Ryan Budney, U Victoria (Canada), Mathematics 02/10-02/18

Marcella Brusa, MPI Extraterrestrial Phys, Astrophysics
02/13-02/17

Toshihiko Hiraiwa, Kyoto U (Japan), Particle Theory 03/0203/02

Jirong Mao, Korea Astron Space Sci Inst (Korea), Astronomy
03/12-03/17

Martin Elvis, Harvard U CfA (USA), Astrophysics 02/1102/23

Jennifer Donley, Space Telescope Sci Inst, Astronomy 02/1302/22

Kenji Inami, Nagoya U (Japan), High Energy Physics 03/0203/02

William Klemm, IPMU (Japan), Particle Theory 03/12-03/16

Mathias Gerny, DESY (Germany), Particle Theory 02/0802/08
Masahiko Yoshinaga, Kyoto U (Japan), Mathematics 02/0902/16

Yuko Kakazu, KICP (USA), Astronomy 02/13-02/22

78

Jonathan Trump, U Arizona (USA), Astronomy 02/13-02/22

IPMU Annual Report 2011

Visitors

Kei-ichi Maeda, Waseda U (Japan), Cosmology 01/23-02/02

Chan Youn Park, Caltech (USA), String Theory 03/12-03/16

Norimi Yokozaki, U Tokyo (Japan), Particle Theory 03/1203/31

IPMU Annual Report 201179

Taotao Qiu, NTU (Taiwan), Cosmology 03/12-03/12

Yoichi Ohyama, ASIAA (Taiwan), Astronomy 03/18-03/23

Patrick Decowski, Nikhef (Netherland), High Energy Physics
03/13-03/18

Robert Lupton, Princeton U (USA), Cosmology 03/18-03/25

Stuart Freedman, UC Berkeley (USA), Neutrino Physics
03/13-03/18
Brian Fujikawa, LBL (USA), Neutrino Physics 03/13-03/28

Gleb Arutyunov, Utrecht U (Netherlands), String Theory
03/19-03/26
Satoshi Miyazaki, NAOJ (Japan), Astronomy 03/19-03/21

Fabrice Madec, LAM (France), Astronomy 03/14-03/22

Tomonori Usuda, NAOJ Hawaii (USA), Astronomy 03/1903/20

Sebastien Vives, LAM (France), Astronomy 03/15-03/23

Sean Couch, U Chicago (USA), Astrophysics 03/19-03/19

Felipe Olivares, MPI Extraterrestrial Phys (Germany),
Astronomy 03/16-03/20

Antonio De Oliveira, LNA (Brazil), Astronomy 03/19-03/21

David Le Mignant, LAM (France), Astronomy 03/16-03/23
Raphael Hirschi, Keele U (Germany), Astronomy 03/1603/30
Sam Jones, Keele U (Germany), Astronomy 03/17-03/24
Ray Sharples, Durham U (UK), Astronomy 03/17-03/21
Joseph Anderson, U Chile (Chile), Astronomy 03/17-03/23
Stephen Smee, Johns Hopkins U (USA), Astronomy 03/1703/24
Michael Carr, Princeton U (USA), Astronomy 03/17-03/23
Olivier Le Fevre, LAM (France), Astronomy 03/17-03/19
Noppadol Mekareeya, MPI Physics (Germany), String
Theory 03/18-03/31
David Crampton, U Victoria (Canada), Astronomy 03/1803/21
Karl Glazebrook, Swinburne U Tech (Australia), Astronomy
03/18-03/21
Timothy Heckman, Johns Hopkins U (USA), Astrophysics
03/18-03/22
Ligia Souza De Oliveira, LNA (Brazil), Astronomy 03/1803/24
David Braun, NASA JPL/Caltech (USA), Astronomy 03/1803/21

Tania Pereira Dominici, LNA (Brazil), Astronomy 03/1903/21
Laerte Sodre, U Sao Paulo (Brazil), Astronomy 03/19-03/21
Markus Friedl, HEPHY (Austria), High Energy Physics
03/19-03/19
Immanuel Gfall, HEPHY (Austria), High Energy Physics
03/19-03/19
Christian Irmler, HEPHY (Austria), High Energy Physics
03/19-03/19
Yoshiyuki Onuki, U Tokyo(Japan), High Energy Physics
03/19-03/19
Manfred Valentan, HEPHY (Austria), High Energy Physics
03/19-03/19
Dongha Kah, Kyungpook National U (Korea), High Energy
Physics 03/19-03/19
Toru Tsuboyama, KEK (Japan), High Energy Physics 03/1903/19
Richard Dekany, Caltech (USA), Astronomy 03/20-03/22
Kohei Kamada, DESY (Germany), Cosmology 03/21-03/23
Daniel Perley, Caltech (USA), Astronomy 03/21-03/22
Atsushi Takahashi, Osaka U (Japan), Mathematical Physics
03/21-03/21
Takashi Oka, U Tokyo (Japan), Condensed Matter Phys
03/28-03/28

Michael Seiffert, NASA JPL/Caltech (USA), Astronomy
03/18-03/21

Visitors

Roger Smith, Caltech (USA), Astronomy 03/18-03/21
Robin Bruno, NASA JPL/Caltech (USA), Astronomy 03/1803/21
Jenny Greene, Princeton U (USA), Astronomy 03/18-03/21
Masashi Chiba, Tohoku U (Japan), Astronomy 03/18-03/21
Shiang-Yu Wang, ASIAA (Taiwan), Astronomy 03/18-03/20
Steven Bickerton, Princeton U (USA), Astronomy 03/1803/22
Richard Ellis, Caltech (USA), Astronomy 03/18-03/20
James Gunn, Princeton U (USA), Astrophysics 03/18-03/21
Akitoshi Ueda, NAOJ (Japan), Astrophysics 03/18-03/24
Hung-Hsu Ling, ASIAA (Taiwan), Astronomy 03/18-03/24

80

IPMU Annual Report 2011

IPMU Annual Report 201181

JFY2011
1. CHEMICAL ENRICHMENT IN THE CARBONENHANCED DAMPED Ly alpha SYSTEM BY
POPULATION III SUPERNOVAE,
Chiaki Kobayashi, Nozomu Tominaga, Ken’ichi
Nomoto,Astrophysical Journal Letters, 730, (2), L14,
2011, APR 1 2011.
2. Holography and Entanglement in Flat Spacetime,
Wei Li, Tadashi Takayanagi,
Physical Review Letters, 106, (14), 141301,
2011, APR 5 2011.
3. ROLE OF LINE-OF-SIGHT COSMIC-RAY
INTERACTIONS IN FORMING THE SPECTRAOF DISTANT BLAZARS IN TeV GAMMA RAYSAND HIGH-ENERGY NEUTRINOS,
Warren Essey, Oleg Kalashev, Alexander Kusenko,
John F Beacom,
Astrophysical Journal, 731, (1), 51, 2011, APR 10
2011.
4. Higgs G inflation,
Kohei Kamada, Tsutomu Kobayashi, Masahide
Yamaguchi, Jun’ichi Yokoyama,
Physical Review D, 83, (8), 083515, 2011, APR 18
2011.
5. THE ATACAMA COSMOLOGY TELESCOPE:
EXTRAGALACTIC SOURCES AT 148 GHz IN
THE 2008 SURVEY,
Tobias A Marriage, Jean Baptiste Juin, Yen-Ting Lin,
Danica Marsden, Michael R Nolta, Bruce Partridge,
Peter A. R Ade, Paula Aguirre, Mandana Amiri,John William Appel, L Felipe Barrientos, Elia S
Battistelli, John R Bond, Ben Brown, Bryce Burger,
Jay Chervenak, Sudeep Das, Mark J Devlin, Simon
R Dicker, W. Bertrand Doriese, Joanna Dunkley,
Rolando Duenner, Thomas Essinger-Hileman, Ryan
P Fisher, Joseph W Fowler, Amir Hajian, MarkHalpern, Matthew Hasselfield, Carlos HernandezMonteagudo, Gene C Hilton, Matt Hilton, Adam D
Hincks, Renee Hlozek, Kevin M Huffenberger, David
Handel Hughes, John P Hughes, Leopoldo Infante,
Kent D Irwin, Madhuri Kaul, Jeff Klein, Arthur
Kosowsky, Judy M Lau, Michele Limon, Robert
H Lupton, Krista Martocci, Phil Mauskopf, Felipe
Menanteau, Kavilan Moodley, Harvey Moseley,Calvin B Netterfield, Michael D Niemack, Lyman
A Page, Lucas Parker, Hernan Quintana, Beth Reid,
Neelima Sehgal, Blake D Sherwin, Jon Sievers, David
N Spergel, Suzanne T Staggs, Daniel S Swetz, Eric
R Switzer, Robert Thornton, Hy Trac, Carole Tucker,
Ryan Warne, Grant Wilson, Ed Wollack, Yue Zhao,
Astrophysical Journal, 731, (2), 100, 2011, APR 20
2011.
6. CONSTRAINING THE QUADRUPOLEMOMENT OF STELLAR-MASS BLACK HOLE
CANDIDATES WITH THE CONTINUUM
FITTING METHOD,
Cosimo Bambi, Enrico Barausse,
Astrophysical Journal, 731, (2), 121, 2011, APR 20
2011.

82

IPMU Annual Report 2011

7. Why have supersymmetric particles not been
observed?,
Fuminobu Takahashi, Tsutomu T Yanagida,
Physics Letters B, 698, (5), pp. 408-410, 2011, APR
25 2011.
8. Tracing the redshift evolution of Hubble parameterwith gravitational-wave standard sirens,Atsushi Nishizawa, Atsushi Taruya, Shun Saito,
Physical Review D, 83, (8), 084045, 2011, APR 26
2011.
9. Imprints of fast-rotating massive stars in the Galactic
Bulge,
Cristina Chiappini, Urs Frischknecht, Georges
Meynet, Raphael Hirschi, Beatriz Barbuy, Marco
Pignatari, Thibaut Decressin, Andre Maeder,
Nature, 472, (7344), pp. 454-457, 2011, APR 28 2011.
10. THE EIGHTH DATA RELEASE OF THE SLOANDIGITAL SKY SURVEY: FIRST DATA FROMSDSS-III,
Hiroaki Aihara, Carlos Allende Prieto, Deokkeun
An, Scott F Anderson, Eric Aubourg, Eduardo
Balbinot, Timothy C Beers, Andreas A Berlind,
Steven J Bickerton, Dmitry Bizyaev, Michael R
Blanton, John J Bochanski, Adam S Bolton, Jo Bovy,
W. N Brandt, J Brinkmann, Peter J Brown, Joel R
Brownstein, Nicolas G Busca, Heather Campbell,Michael A Carr, Yanmei Chen, Cristina Chiappini,
Johan Comparat, Natalia Connolly, Marina Cortes,
Rupert A. C Croft, Antonio J Cuesta, Luiz N da
Costa, James R. A Davenport, Kyle Dawson, Saurav
Dhital, Anne Ealet, Garrett L Ebelke, Edward M
Edmondson, Daniel J Eisenstein, Stephanie Escoffier,
Massimiliano Esposito, Michael L Evans, XiaohuiFan, Bruno Femenia Castella, Andreu Font-Ribera,Peter M Frinchaboy, Jian Ge, Bruce A Gillespie, G
Gilmore, Jonay I Gonzalez Hernandez, J. Richard
Gott, Andrew Gould, Eva K Grebel, James E Gunn,
Jean-Christophe Hamilton, Paul Harding, DavidW Harris, Suzanne L Hawley, Frederick R Hearty,
Shirley Ho, David W Hogg, Jon A Holtzman, Klaus
Honscheid, Naohisa Inada, Inese I Ivans, Linhua
Jiang, Jennifer A Johnson, Cathy Jordan, Wendell P
Jordan, Eyal A Kazin, David Kirkby, Mark A Klaene,
G. R Knapp, Jean-Paul Kneib, C. S Kochanek, Lars
Koesterke, Juna A Kollmeier, Richard G Kron,
Hubert Lampeitl, Dustin Lang, Jean-Marc Le Goff,
Young Sun Lee, Yen-Ting Lin, Daniel C Long, Craig
P Loomis, Sara Lucatello, Britt Lundgren, Robert H
Lupton, Zhibo Ma, Nicholas MacDonald, Suvrath
Mahadevan, Marcio A. G Maia, Martin Makler,
Elena Malanushenko, Viktor Malanushenko, Rachel
Mandelbaum, Claudia Maraston, Daniel Margala,
Karen L Masters, Cameron K McBride, Peregrine
M McGehee, Ian D McGreer, Brice Menard, Jordi
Miralda-Escude, Heather L Morrison, F Mullally,
Demitri Muna, Jeffrey A Munn, Hitoshi Murayama,
Adam D Myers, Tracy Naugle, Angelo Fausti Neto,
Duy Cuong Nguyen, Robert C Nichol, Robert W
O’Connell, Ricardo L. C Ogando, Matthew D
Olmstead, Daniel J Oravetz, Nikhil Padmanabhan,
Nathalie Palanque-Delabrouille, Kaike Pan, Parul
Pandey, Isabelle Paris, Will J Percival, Patrick
Petitjean, Robert Pfaffenberger, Janine Pforr, Stefanie
Phleps, Christophe Pichon, Matthew M Pieri,
Francisco Prada, Adrian M Price-Whelan, M. Jordan

Raddick, Beatriz H. F Ramos, Celine Reyle, James Rich,
Gordon T Richards, Hans-Walter Rix, Annie C Robin,
Helio J Rocha-Pinto, Constance M Rockosi,
Natalie A Roe, Emmanuel Rollinde, Ashley J Ross,
Nicholas P Ross, Bruno M Rossetto, Ariel G Sanchez,
Conor Sayres, David J Schlegel, Katharine J Schlesinger,
Sarah J Schmidt, Donald P Schneider, Erin Sheldon,
Yiping Shu, Jennifer Simmerer, Audrey E Simmons,Thirupathi Sivarani, Stephanie A Snedden, Jennifer
S Sobeck, Matthias Steinmetz, Michael A Strauss,
Alexander S Szalay, Masayuki Tanaka, Aniruddha R
Thakar, Daniel Thomas, Jeremy L Tinker, Benjamin
M Tofflemire, Rita Tojeiro, Christy A Tremonti, Jan
Vandenberg, M. Vargas Magana, Licia Verde, Nicole P
Vogt, David A Wake, Ji Wang, Benjamin A Weaver, David
H Weinberg, Martin White, Simon D. M White, Brian
Yanny, Naoki Yasuda, Christophe Yeche, Idit Zehavi,
Astrophysical Journal Supplement Series, 193, (2), 29,2011, APR 2011.
11. Direct observational evidence for a large transient galaxy
population in groups at 0.851,
Michael L Balogh, Sean L McGee, David J Wilman,
Alexis Finoguenov, Laura C Parker, Jennifer L Connelly,John S Mulchaey, Richard G Bower, Masayuki Tanaka,
Stefania Giodini,Monthly Notices of the Royal Astronomical Society, 412,(4), pp. 2303-2317, 2011, APR 2011.
12. The zCOSMOS-Bright survey: the clustering of early andlate galaxy morphological types since z similar or equal
to 1,
S de la Torre, O Le Fevre, C Porciani, L Guzzo, B
Meneux, U Abbas, L Tasca, C. M Carollo, T Contini, J.
-P Kneib, S. J Lilly, V Mainieri, A Renzini, M Scodeggio,
G Zamorani, S Bardelli, M Bolzonella, A Bongiorno, K
Caputi, G Coppa, O Cucciati, L de Ravel, P Franzetti, B
Garilli, C Halliday, A Iovino, P Kampczyk, C Knobel, A.
M Koekemoer, K Kovac, F Lamareille, J. -F Le Borgne, V
Le Brun, C Maier, M Mignoli, R Pello, Y Peng, E PerezMontero, E Ricciardelli, J Silverman, M Tanaka, L Tresse,
D Vergani, E Zucca, D Bottini, A Cappi, P Cassata, A
Cimatti, A Leauthaud, D Maccagni, C Marinoni, H. J
McCracken, P Memeo, P Oesch, L Pozzetti, R Scaramella,Monthly Notices of the Royal Astronomical Society, 412,(2), pp. 825-834, 2011, APR 2011.
13. Gravitino dark matter and light gluino in an Rinvariant
low scale gauge mediation,
Masahiro Ibe, Ryosuke Sato, Tsutomu T Yanagida,Kazuya Yonekura,
Journal of High Energy Physics, (4), 077, 2011, APR 2011.
14. Supernova dust for the extinction law in a young infrared
galaxy at z similar to 1,
K Kawara, H Hirashita, T Nozawa, T Kozasa, S Oyabu, Y
Matsuoka, T Shimizu, H Sameshima, N Ienaka,
Monthly Notices of the Royal Astronomical Society, 412,(2), pp. 1070-1080, 2011, APR 2011.
15. Holographic conductivity in disordered systems, Shinsei
Ryu, Tadashi Takayanagi, Tomonori Ugajin,
Journal of High Energy Physics, (4), 115, 2011, APR 2011.
16. Product structures in motivic cohomology and higher
Chow groups,
Satoshi Kondo, Seidai Yasuda,
Journal of Pure and Applied Algebra, 215, (4), pp. 511522, 2011, APR 2011.
17. THE ATACAMA COSMOLOGY TELESCOPE:
COSMOLOGY FROM GALAXY CLUSTERS
DETECTED VIA THE SUNYAEV-ZEL’DOVICHEFFECT,
Neelima Sehgal, Hy Trac, Viviana Acquaviva, Peter A.
R Ade, Paula Aguirre, Mandana Amiri, John W Appel,
L Felipe Barrientos, Elia S Battistelli, J. Richard Bond,

Ben Brown, Bryce Burger, Jay Chervenak, Sudeep Das,
Mark J Devlin, Simon R Dicker, W. Bertrand Doriese,
Joanna Dunkley, Rolando Duenner, Thomas EssingerHileman, Ryan P Fisher, Joseph W Fowler, Amir
Hajian, Mark Halpern, Matthew Hasselfield, Carlos
Hernandez-Monteagudo, Gene C Hilton, Matt Hilton,
Adam D Hincks, Renee Hlozek, David Holtz, Kevin
M Huffenberger, David H Hughes, John P Hughes,
Leopoldo Infante, Kent D Irwin, Andrew Jones, Jean
Baptiste Juin, Jeff Klein, Arthur Kosowsky, Judy M Lau,
Michele Limon, Yen-Ting Lin, Robert H Lupton, Tobias
A Marriage, Danica Marsden, Krista Martocci, Phil
Mauskopf, Felipe Menanteau, Kavilan Moodley, Harvey
Moseley, Calvin B Netterfield, Michael D Niemack,
Michael R Nolta, Lyman A Page, Lucas Parker, Bruce
Partridge, Beth Reid, Blake D Sherwin, Jon Sievers,
David N Spergel, Suzanne T Staggs, Daniel S Swetz, Eric
R Switzer, Robert Thornton, Carole Tucker, Ryan Warne,
Ed Wollack, Yue Zhao,
Astrophysical Journal, 732, (1), 44, 2011, MAY 1 2011.
18. EARLY-TYPE GALAXIES AT z similar to 1.3. II.
MASSES AND AGES OF EARLYTYPE GALAXIESIN DIFFERENT ENVIRONMENTS AND THEIR
DEPENDENCE ON STELLAR POPULATION MODELASSUMPTIONS,
A Raichoor, S Mei, F Nakata, S. A Stanford, B. P Holden,
A Rettura, M Huertas-Company, M Postman, P Rosati, J.
P Blakeslee, R Demarco, P Eisenhardt, G Illingworth, M.
J Jee, T Kodama, M Tanaka, R. L White,
Astrophysical Journal, 732, (1), 12, 2011, MAY 1 2011.
19. The Japanese space gravitational wave antenna: DECIGO,
Seiji Kawamura, Masaki Ando, Naoki Seto, Shuichi Sato,
Takashi Nakamura, Kimio Tsubono, Nobuyuki Kanda,
Takahiro Tanaka, Jun’ichi Yokoyama, Ikkoh Funaki,
Kenji Numata, Kunihito Ioka, Takeshi Takashima,
Kazuhiro Agatsuma, Tomotada Akutsu, Kohsuke
Aoyanagi, Koji Arai, Akito Araya, Hideki Asada, Yoichi
Aso, Dan Chen, Takeshi Chiba, Toshikazu Ebisuzaki,
Yumiko Ejiri, Motohiro Enoki, Yoshiharu Eriguchi,
Masa-Katsu Fujimoto, Ryuichi Fujita, Mitsuhiro
Fukushima, Toshifumi Futamase, Tomohiro Harada,
Tatsuaki Hashimoto, Kazuhiro Hayama, Wataru Hikida,
Yoshiaki Himemoto, Hisashi Hirabayashi, Takashi
Hiramatsu, Feng-Lei Hong, Hideyuki Horisawa, Mizuhiko
Hosokawa, Kiyotomo Ichiki, Takeshi Ikegami, Kaiki
T Inoue, Koji Ishidoshiro, Hideki Ishihara, Takehiko
Ishikawa, Hideharu Ishizaki, Hiroyuki Ito, Yousuke
Itoh, Kiwamu Izumi, Isao Kawano, Nobuki Kawashima,
Fumiko Kawazoe, Naoko Kishimoto, Kenta Kiuchi,
Shiho Kobayashi, Kazunori Kohri, Hiroyuki Koizumi,
Yasufumi Kojima, Keiko Kokeyama, Wataru Kokuyama,
Kei Kotake, Yoshihide Kozai, Hiroo Kunimori, Hitoshi
Kuninaka, Kazuaki Kuroda, Sachiko Kuroyanagi, Keiichi
Maeda, Hideo Matsuhara, Nobuyuki Matsumoto, Yuta
Michimura, Osamu Miyakawa, Umpei Miyamoto, Shinji
Miyoki, Mutsuko Y Morimoto, Toshiyuki Morisawa,
Shigenori Moriwaki, Shinji Mukohyama, Mitsuru Musha,
Shigeo Nagano, Isao Naito, Kouji Nakamura, Hiroyuki
Nakano, Kenichi Nakao, Shinichi Nakasuka, Yoshinori
Nakayama, Kazuhiro Nakazawa, Erina Nishida,
Kazutaka Nishiyama, Atsushi Nishizawa, Yoshito Niwa,
Taiga Noumi, Yoshiyuki Obuchi, Masatake Ohashi,
Naoko Ohishi, Masashi Ohkawa, Kenshi Okada, Norio
Okada, Kenichi Oohara, Norichika Sago, Motoyuki
Saijo, Ryo Saito, Masaaki Sakagami, Shin-ichiro Sakai,
Shihori Sakata, Misao Sasaki, Takashi Sato, Masaru
Shibata, Hisaaki Shinkai, Ayaka Shoda, Kentaro Somiya,Hajime Sotani, Naoshi Sugiyama, Yudai Suwa, Rieko
Suzuki, Hideyuki Tagoshi, Fuminobu Takahashi, Kakeru
Takahashi, Keitaro Takahashi, Ryutaro Takahashi,
Ryuichi Takahashi, Tadayuki Takahashi, Hirotaka
Takahashi, Takamori Akiteru, Tadashi Takano, Nobuyuki
Tanaka, Keisuke Taniguchi, Atsushi Taruya, Hiroyuki
Tashiro, Yasuo Torii, Morio Toyoshima, Shinji Tsujikawa,
Yoshiki Tsunesada, Akitoshi Ueda, Ken-ichi Ueda,

IPMU Annual Report 2011

Publications

12 Publications

8320. EARLY-TYPE GALAXIES AT z similar to 1.3. III. ON
THE DEPENDENCE OF FORMATION EPOCHS AND
STAR FORMATION HISTORIES ON STELLAR MASS
AND ENVIRONMENT,A Rettura, S Mei, S. A Stanford, A Raichoor, S Moran, B
Holden, P Rosati, R Ellis, F Nakata, M Nonino, T Treu, J.
P Blakeslee, R Demarco, P Eisenhardt, H. C Ford, R. A. E
Fosbury, G Illingworth, M Huertas-Company, M. J Jee, T
Kodama, M Postman, M Tanaka, R. L White,
Astrophysical Journal, 732, (2), 94, 2011, MAY
10 2011.
21. Constraint on the quadrupole moment of supermassive
black hole candidates from the estimate of the mean
radiative efficiency of AGN,
Cosimo Bambi,
Physical Review D, 83, (10), 103003, 2011, MAY 10 2011.
22. Identifying the Inflaton with Primordial Gravitational
Waves,
Damien A. Easson, Brian A. Powell,
Physical Review Letters, 106, (19), 191302, 2011, MAY 11
2011.
23. Top Quark Forward-Backward Asymmetry and SameSign Top Quark Pairs,
Edmond L. Berger, Qing-Hong Cao, Chuan-Ren Chen,
Chong Sheng Li, Hao Zhang,Physical Review Letters, 106, (20), 201801, 2011, MAY
17 2011.
24. Warm Dirac-Born-Infeld inflation,
Yi-Fu Cai, James B. Dent, Damien A. Easson,
Physical Review D, 83, (10), 101301, 2011, MAY 19 2011.
25. Number-theory dark matter,Kazunori Nakayama, Fuminobu Takahashi, Tsutomu T
Yanagida,
Physics Letters B, 699, (5), pp. 360-363, 2011, MAY 23
2011.

32. Measuring coherent motions in the universe,
Yong-Seon Song, Cristiano G. Sabiu, Issha Kayo, Robert
C. Nichol,
Journal of Cosmology and Astroparticle Physics, 0, (5),020, 2011, MAY 2011.
33. Improvement of low energy atmospheric neutrino flux
calculation using the JAM nuclear interaction model,
M Honda, T Kajita, K Kasahara, S Midorikawa,Physical Review D, 83, (12), 123001, 2011, JUN 2 2011.
34. A possible interpretation of CDF dijet mass anomaly andits realization in supersymmetry,
Ryosuke Sato, Satoshi Shirai, Kazuya Yonekura,Physics Letters B, 700, (2), pp. 122-125, 2011, JUN 6
2011.
35. Cosmological constraints on dark matter models withvelocity-dependent annihilation cross section,
Junji Hisano, Masahiro Kawasaki, Kazunori Kohri, Takeo
Moroi, Kazunori Nakayama, Toyokazu Sekiguchi,
Physical Review D, 83, (12), 123511, 2011, JUN 7 2011.
36. Uncovering multiple CP-nonconserving mechanisms of(beta beta)(0v) decay,
Amand Faessler, A Meroni, S. T Petcov, F Simkovic, J
Vergados,
Physical Review D, 83, (11), 113003, 2011, JUN 7 2011.
37. Magnification effect on the detection of primordial nonGaussianity from photometric surveys,
Toshiya Namikawa, Tomohiro Okamura, Atsushi Taruya,
Physical Review D, 83, (12), 123514, 2011, JUN 9 2011.
38. Gauge-invariant quantum gravity corrections to CallanSymanzik beta functions via the Vilkovisky-DeWitt
method and gravity-assisted gauge unification,
Hong-Jian He, Xu-Feng Wang, Zhong-Zhi Xianyu,
Physical Review D, 83, (12), 125014, 2011, JUN 10 2011.

27. Forecasting the cosmological constraints with anisotropic
baryon acoustic oscillations from multipole expansion,
Atsushi Taruya, Shun Saito, Takahiro Nishimichi,
Physical Review D, 83, (10), 103527, 2011, MAY 27 2011.

39. A MULTIBAND STUDY OF THE GALAXY
POPULATIONS OF THE FIRST FOUR SUNYAEVZEL’DOVICH EFFECT SELECTED GALAXY
CLUSTERS,
A. Zenteno, J. Song, S. Desai, R. Armstrong, J. J. Mohr, C.
-C. Ngeow, W. A. Barkhouse, S. S. Allam, K. Andersson,
G. Bazin, B. A. Benson, E. Bertin, M. Brodwin, E. J.
Buckley-Geer, S. M. Hansen, F. W. High, H. Lin, Y. -T.
Lin, J. Liu, A. Rest, R. C. Smith, B. Stalder, A. A. Stark, D.
L. Tucker, Y. Yang,
Astrophysical Journal, 734, (1), 3, 2011, JUN 10 2011.

28. Split Generation in the SUSY Mass Spectrum and B-s(B)over-bar(s) Mixing,
Motoi Endo, Satoshi Shirai, Tsutomu T Yanagida,
Progress of Theoretical Physics, 125, (5), pp. 921-932,
2011, MAY 2011.

40. Top quark polarization as a probe of models with extra
gauge bosons,
Edmond L. Berger, Qing-Hong Cao, Chuan-Ren
Chen, Hao Zhang,Physical Review D, 83, (11), 114026, 2011, JUN 13 2011.

29. The Effect of Varying Sound Velocity on Primordial
Curvature Perturbations,
Masahiro Nakashima, Ryo Saito, Yu-ichi Takamizu,
Jun’ichi Yokoyama,
Progress of Theoretical Physics, 125, (5), pp. 1035-1052,
2011, MAY 2011.

41. Core-collapse astrophysics with a five-megaton neutrino
detector,
Matthew D Kistler, Hasan Yueksel, Shin’ichiro Ando,John F Beacom, Yoichiro Suzuki,
Physical Review D, 83, (12), 123008, 2011, JUN 20 2011.

26. Primordial non-Gaussianity from G inflation,
Tsutomu Kobayashi, Masahide Yamaguchi, Jun’ichi
Yokoyama,
Physical Review D, 83, (10), 103524, 2011, MAY 24 2011.

30. Astroparticle physics with solar neutrinos, Masayuki
Nakahata,
Proceedings of the Japan Academy Series BPhysical andBiological Sciences, 87, (5), pp. 215-229, 2011, MAY
2011.

84

31. Evolution of the spin parameter of accreting compact
objects with non-Kerr quadrupole moment,
Cosimo Bambi,
Journal of Cosmology and Astroparticle Physics, 0, (5),009, 2011, MAY 2011.

IPMU Annual Report 2011

42. SIMULATIONS OF WIDE-FIELD WEAKLENSINGSURVEYS. II. COVARIANCE MATRIX OF REALSPACE CORRELATION FUNCTIONS,
Masanori Sato, Masahiro Takada, Takashi Hamana,
Takahiko Matsubara,
Astrophysical Journal, 734, (2), 76, 2011, JUN 20 2011.

43. Horava-Lifshitz gravity with lambda → infinity,
A. Emir Guemruekcueoglu, Shinji Mukohyama,
Physical Review D, 83, (12), 124033, 2011, JUN 21 2011.
44. Cosmological aspects of inflation in a supersymmetricaxion model,
Masahiro Kawasaki, Naoya Kitajima, Kazunori
Nakayama,
Physical Review D, 83, (12), 123521, 2011, JUN 21 2011.
45. Inverse seesaw in supersymmetry,
Seong Chan Park, Kai Wang,
Physics Letters B, 701, (1), pp. 107-110, 2011, JUN 27
2011.
46. Improved estimation of radiated axions from cosmologicalaxionic strings,
Takashi Hiramatsu, Masahiro Kawasaki, Toyokazu
Sekiguchi, Masahide Yamaguchi, Jun’ichi Yokoyama,
Physical Review D, 83, (12), 123531, 2011, JUN 28 2011.
47. Baryogenesis from Dark Sector,
Naoyuki Haba, Sigeki Matsumoto,
Progress of Theoretical Physics, 125, (6), pp. 1311-1316,
2011, JUN 2011.
48. Effects of the explosion asymmetry and viewing angle on
the Type Ia supernova colour and luminosity calibration,
Keiichi Maeda, Giorgos Leloudas, Stefan Taubenberger,
Maximilian Stritzinger, Jesper Sollerman, Nancy EliasRosa, Stefano Benetti, Mario Hamuy, Gaston Folatelli,
Paolo A Mazzali,
Monthly Notices of the Royal Astronomical Society, 413,(4), pp. 3075-3094, 2011, JUN 2011.

56. On the second rational K-group of an elliptic curve overglobal fields of positive characteristic,
Satoshi Kondo, Seidai Yasuda,
Proceedings of the London Mathematical Society, 102,
pp. 1053-1098, 2011, JUN 2011.
57. Spinning super-massive objects in galactic nuclei up toa(*) > 1,
C. Bambi,
Epl, 94, (5), 50002, 2011, JUN 2011.
58. THE ROLE OF DUST IN THE EARLY UNIVERSE. I.
PROTOGALAXY EVOLUTION,
Daisuke Yamasawa, Asao Habe, Takashi Kozasa, Takaya
Nozawa, Hiroyuki Hirashita, Hideyuki Umeda, Ken’ichi
Nomoto,Astrophysical Journal, 735, (1), 44, 2011, JUL 1 2011.
59. Notes on beta-deformations of the pure spinor superstringin AdS(5) x S-5,
Oscar A Bedoya, L Ibiapina Bevilaqua, Andrei Mikhailov,
Victor O Rivelles,
Nuclear Physics B, 848, (1), pp. 155-215, 2011, JUL 1
2011.
60. Low energy signatures of the TeV scale seesaw
mechanism,
A Ibarra, E Molinaro, S. T Petcov,
Physical Review D, 84, (1), 013005, 2011, JUL 7 2011.
61. Studying very light gravitino at the ILC,
Shigeki Matsumoto, Takeo Moroi,
Physics Letters B, 701, (4), pp. 422-426, 2011, JUL 18
2011.

49. Wall Crossing and M-Theory,
Mina Aganagic, Hirosi Ooguri, Cumrun Vafa, Masahito
Yamazaki,Publications of the Research Institute ForMathematical
Sciences, 47, (2), pp. 569-584, 2011, JUN 2011.

62. Yangian symmetry in deformed WZNW models onsquashed spheres,
Io Kawaguchi, Domenico Orlando, Kentaroh Yoshida,
Physics Letters B, 701, (4), pp. 475-480, 2011, JUL 18
2011.

50. Optical studies of SN 2009jf: a Type Ib supernova with anextremely slow decline and aspherical signature,
D. K Sahu, U. K Gurugubelli, G. C Anupama, K Nomoto,Monthly Notices of the Royal Astronomical Society, 413,(4), pp. 2583-2594, 2011, JUN 2011.

63. EVOLUTION OF PRIMORDIAL STARS POWEREDBY DARK MATTER ANNIHILATION UP TO THE
MAIN-SEQUENCE STAGE,
Shingo Hirano, Hideyuki Umeda, Naoki Yoshida,
Astrophysical Journal, 736, (1), 58, 2011, JUL 20 2011.

51. Two jets and missing E-T signature to determine the spinsof new particles,
Mihoko M Nojiri, Jing Shu,
Journal of High Energy Physics, (6), 047, 2011, JUN 2011.

64. FORMATION OF DUST IN THE EJECTA OF TYPE Ia
SUPERNOVAE,
Takaya Nozawa, Keiichi Maeda, Takashi Kozasa,
Masaomi Tanaka, Ken’ichi Nomoto, Hideyuki Umeda,
Astrophysical Journal, 736, (1), 45, 2011, JUL 20 2011.

52. Algebraic Analysis of Minimal Representations,
Toshiyuki Kobayashi,
Publications of the Research Institute For Mathematical
Sciences, 47, (2), pp. 585-611, 2011, JUN 2011.
53. Future oscillations around phantom divide in f(R) gravity,
Hayato Motohashi, Alexei A Starobinsky, Jun’ichi
Yokoyama,
Journal of Cosmology and Astroparticle Physics, (6), 006,
2011, JUN 2011.
54. Probing AdS wormholes by entanglement entropy,
Mitsutoshi Fujita, Yasuyuki Hatsuda, Tadashi
Takayanagi,
Journal of High Energy Physics, (6), 141, 2011, JUN 2011.
55. The pairwise velocity probability density function inmodels with local primordial non-Gaussianity,
Tsz Yan Lam, Takahiro Nishimichi, Naoki Yoshida,Monthly Notices of the Royal Astronomical Society, 414,(1), pp. 289-303, 2011, JUN 2011.

65. Testing Higgs portal dark matter via Z fusion at a linear
collider,Shinya Kanemura, Shigeki Matsumoto, Takehiro
Nabeshima, Hiroyuki Taniguchi,
Physics Letters B, 701, (5), pp. 591-596, 2011, JUL 27
2011.
66. THE CHANDRA DEEP FIELD-SOUTH SURVEY: 4
Ms SOURCE CATALOGS,
Y. Q Xue, B Luo, W. N Brandt, F. E Bauer, B. D Lehmer,
P. S Broos, D. P Schneider, D. M Alexander, M Brusa,
A Comastri, A. C Fabian, R Gilli, G Hasinger, A. E
Hornschemeier, A Koekemoer, T Liu, V Mainieri, M
Paolillo, D. A Rafferty, P Rosati, O Shemmer, J. D
Silverman, I Smail, P Tozzi, C Vignali,
Astrophysical Journal Supplement Series, 195, (1), 10,2011, JUL 2011.

Publications

Masayoshi Utashima, Yaka Wakabayashi, Kent Yagi,
Hiroshi Yamakawa, Kazuhiro Yamamoto, Toshitaka
Yamazaki, Chul-Moon Yoo, Shijun Yoshida, Taizoh
Yoshino, Ke-Xun Sun,Classical and Quantum Gravity, 28, (9), 094011, 2011,
MAY 7 2011.

67. Supernovae from red supergiants with extensive mass
loss,
Takashi Moriya, Nozomu Tominaga, Sergei I Blinnikov,
Petr V Baklanov, Elena I Sorokina,
Monthly Notices of the Royal Astronomical Society, 415,(1), pp. 199-213, 2011, JUL 2011.

IPMU Annual Report 201185

69. A comparison of spectroscopic methods for detecting
the starlight scattered by transiting hot Jupiters, with
an application to Subaru data for HD 209458b and HD
189733b,
Sally V Langford, J. Stuart B Wyithe, Edwin L Turner,
Edward B Jenkins, Norio Narita, Xin Liu, Yasushi Suto,
Toru Yamada,Monthly Notices of the Royal Astronomical Society, 415,(1), pp. 673-686, 2011, JUL 2011.
70. Evolutionary tracks of individual quasars in the massluminosity plane,
Charles L Steinhardt, Martin Elvis, Mihail Amarie,
Monthly Notices of the Royal Astronomical Society, 415,(1), pp. 732-740, 2011, JUL 2011.
71. N=1 curves for trifundamentals,
Yuji Tachikawa, Kazuya Yonekura,
Journal of High Energy Physics, 0, (7), 025, 2011, JUL
2011.
72. THE XMM-NEWTONWIDE FIELD SURVEY IN THE
COSMOS FIELD: REDSHIFT EVOLUTION OF AGN
BIAS AND SUBDOMINANT ROLE OF MERGERS IN
TRIGGERING MODERATE-LUMINOSITY AGNs AT
REDSHIFTS UP TO 2.2,
V Allevato, A Finoguenov, N Cappelluti, T Miyaji, G
Hasinger, M Salvato, M Brusa, R Gilli, G Zamorani, F
Shankar, J. B James, H. J McCracken, A Bongiorno, A
Merloni, J. A Peacock, J Silverman, A Comastri,
Astrophysical Journal, 736, (2), 99, 2011, AUG 1 2011.
73. MICROWAVE EMISSION FROM THE EDGEWORTHKUIPER BELT AND THE ASTEROID BELTCONSTRAINED FROM THE WILKINSONMICROWAVE ANISOTROPY PROBE,
Kazuhide Ichikawa, Masataka Fukugita,
Astrophysical Journal, 736, (2), 122, 2011, AUG 1 2011.
74. Geodesic axes in the pants complex of the fiveholed
sphere,Kenneth J. Shackleton,
Topology and its Applications, 158, (13), pp. 1640-1654,
2011, AUG 15 2011.
75. Mass measurement in boosted decay systems at hadroncolliders,
Won Sang Cho, William Klemm, Mihoko M Nojiri,
Physical Review D, 84, (3), 035018, 2011, AUG 18 2011.

86

Luiz N da Costa, James R. A Davenport, Kyle Dawson,
Saurav Dhital, Anne Ealet, Garrett L Ebelke, Edward M
Edmondson, Daniel J Eisenstein, Stephanie Escoffier,
Massimiliano Esposito, Michael L Evans, Xiaohui Fan,
Bruno Femenia Castella, Andreu Font-Ribera, Peter M
Frinchaboy, Jian Ge, Bruce A Gillespie, G Gilmore, Jonay
I Gonzalez Hernandez, J. Richard Gott, Andrew Gould,
Eva K Grebel, James E Gunn, Jean-Christophe Hamilton,
Paul Harding, David W Harris, Suzanne L Hawley,
Frederick R Hearty, Shirley Ho, David W Hogg, Jon A
Holtzman, Klaus Honscheid, Naohisa Inada, Inese I Ivans,
Linhua Jiang, Jennifer A Johnson, Cathy Jordan, Wendell
P Jordan, Eyal A Kazin, David Kirkby, Mark A Klaene,
G. R Knapp, Jean-Paul Kneib, C. S Kochanek, Lars
Koesterke, Juna A Kollmeier, Richard G Kron, Hubert
Lampeitl, Dustin Lang, Jean- Marc Le Goff, Young Sun
Lee, Yen-Ting Lin, Daniel C Long, Craig P Loomis, Sara
Lucatello, Britt Lundgren, Robert H Lupton, Zhibo Ma,
Nicholas MacDonald, Suvrath Mahadevan, Marcio A.
G Maia, Martin Makler, Elena Malanushenko, Viktor
Malanushenko, Rachel Mandelbaum, Claudia Maraston,Daniel Margala, Karen L Masters, Cameron K McBride,
Peregrine M McGehee, Ian D McGreer, Brice Menard,
Jordi Miralda-Escude, Heather L Morrison, F Mullally,
Demitri Muna, Jeffrey A Munn, Hitoshi Murayama, Adam
D Myers, Tracy Naugle, Angelo Fausti Neto, Duy Cuong
Nguyen, Robert C Nichol, Robert W O’Connell, Ricardo
L. C Ogando, Matthew D Olmstead, Daniel J Oravetz,
Nikhil Padmanabhan, Nathalie Palanque-Delabrouille,
Kaike Pan, Parul Pandey, Isabelle Paris, Will J Percival,
Patrick Petitjean, Robert Pfaffenberger, Janine Pforr,
Stefanie Phleps, Christophe Pichon, Matthew M Pieri,
Francisco Prada, Adrian M Price-Whelan, M. Jordan
Raddick, Beatriz H. F Ramos, Celine Reyle, James Rich,
Gordon T Richards, Hans-Walter Rix, Annie C Robin,
Helio J Rocha-Pinto, Constance M Rockosi, Natalie
A Roe, Emmanuel Rollinde, Ashley J Ross, Nicholas
P Ross, Bruno M Rossetto, Ariel G Sanchez, Conor
Sayres, David J Schlegel, Katharine J Schlesinger, Sarah
J Schmidt, Donald P Schneider, Erin Sheldon, Yiping
Shu, Jennifer Simmerer, Audrey E Simmons, Thirupathi
Sivarani, Stephanie A Snedden, Jennifer S Sobeck,
Matthias Steinmetz, Michael A Strauss, Alexander S
Szalay, Masayuki Tanaka, Aniruddha R Thakar, Daniel
Thomas, Jeremy L Tinker, Benjamin M Tofflemire, Rita
Tojeiro, Christy A Tremonti, Jan Vandenberg, M. Vargas
Magana, Licia Verde, Nicole P Vogt, David A Wake, Ji
Wang, Benjamin A Weaver, David H Weinberg, Martin
White, Simon D. M White, Brian Yanny, Naoki Yasuda,
Christophe Yeche, Idit Zehavi,
Astrophysical Journal Supplement Series, 195, (2), 26,
2011, AUG 2011.

76. Baryon acoustic oscillations in 2D. II. Redshiftspace haloclustering in N-body simulations,Takahiro Nishimichi, Atsushi Taruya,
Physical Review D, 84, (4), 043526, 2011, AUG 24 2011.

79. f(R) GRAVITY AND ITS COSMOLOGICALIMPLICATIONS,
Hayato Motohashi, Alexei A Starobinsky, Jun’ichi
Yokoyama,
International Journal of Modern Physics D, 20, (8), pp.
1347-1355, 2011, AUG 2011.

77. Holographic Dual of a Boundary Conformal Field Theory,
Tadashi Takayanagi,
Physical Review Letters, 107, (10), 101602, 2011, AUG 30
2011.

80. Higgs messengers,
Jason L Evans, Matthew Sudano, Tsutomu T Yanagida,
Journal of High Energy Physics, (8), 142, 2011, AUG
2011.

78. THE EIGHTH DATA RELEASE OF THE SLOANDIGITAL SKY SURVEY: FIRST DATA FROM SDSSIII (vol 193, pg 29, 2011),
Hiroaki Aihara, Carlos Allende Prieto, Deokkeun An,
Scott F Anderson, Eric Aubourg, Eduardo Balbinot,
Timothy C Beers, Andreas A Berlind, Steven J Bickerton,
Dmitry Bizyaev, Michael R Blanton, John J Bochanski,
Adam S Bolton, Jo Bovy, W. N Brandt, J Brinkmann,Peter J Brown, Joel R Brownstein, Nicolas G Busca,
Heather Campbell, Michael A Carr, Yanmei Chen,
Cristina Chiappini, Johan Comparat, Natalia Connolly,
Marina Cortes, Rupert A. C Croft, Antonio J Cuesta,

81. Evolution of string-wall networks and axionic domain
wall problem,
Takashi Hiramatsu, Masahiro Kawasaki, Ken’ichi
Saikawa,
Journal of Cosmology and Astroparticle Physics, (8), 030,
2011, AUG 2011.

IPMU Annual Report 2011

82. Combining perturbation theories with halo models for thematter bispectrum,
P Valageas, T Nishimichi,
Astronomy & Astrophysics, 532, A4, 2011, AUG 2011.

83. Bounds for state degeneracies in 2D conformal field
theory,Simeon Hellerman, Cornelius Schmidt-Colinet,
Journal of High Energy Physics, (8), 2011, AUG 2011.

K. S Long, P Lundqvist, T Nozawa, K. D Gordon, S Hony,
P Panuzzo, K Okumura, K. A Misselt, E Montiel, M
Sauvage,
Science, 333, (6047), pp. 1258-1261, 2011, SEP 2 2011.

84. Bounds for state degeneracies in 2D conformal field
theory,Simeon Hellerman, Cornelius Schmidt-Colinet,
Journal of High Energy Physics, (8), 127, 2011, AUG
2011.

95. IMPACTS OF COLLECTIVE NEUTRINO
OSCILLATIONS ON CORE-COLLAPSE SUPERNOVAEXPLOSIONS,Yudai Suwa, Kei Kotake, Tomoya Takiwaki, Matthias
Liebendoerfer, Katsuhiko Sato,
Astrophysical Journal, 738, (2), 165, 2011, SEP 10 2011.

85. A universal inequality for CFT and quantum gravity,
Simeon Hellerman,
Journal of High Energy Physics, (8), 130, 2011, AUG
2011.
86. Next-to-leading resummation of cosmologicalperturbations via the Lagrangian picture: 2-loop
correction in real and redshift spaces,
Tomohiro Okamura, Atsushi Taruya, TakahikoMatsubara,
Journal of Cosmology and Astroparticle Physics, (8), 012,
2011, AUG 2011.
87. SOFT LEPTOGENESIS AND GRAVITINO DARKMATTER IN GAUGE MEDIATION,
Koichi Hamaguchi, N Yokozaki,
International Journal of Modern Physics D, 20, (8), pp.
1533-1538, 2011, AUG 2011.
88. Constraints on direct gauge mediation models withcomplex representations,
Kentaro Hanaki, Masahiro Ibe, Yutaka Ookouchi, ChangSoon Park,
Journal of High Energy Physics, 0, (8), 044, 2011, AUG
2011.
89. Effective dark matter model: relic density, CDMS II,
Fermi LAT and LHC,
Hao Zhang, Qing-Hong Cao, Chuan-Ren Chen, Chong
Sheng Li,
Journal of High Energy Physics, 0, (8), 018, 2011, AUG
2011.
90. The effect of a single supernova explosion on the cuspy
density profile of a small-mass dark matter halo,
R. S. de Souza, L. F. S. Rodrigues, E. E. O. Ishida, R.
Opher,
Monthly Notices of the Royal Astronomical Society, 415,(3), pp. 2969-2973, 2011, AUG 2011.
91. MODEL-INDEPENDENT STUDIES OF DARKMATTER,
Chuan-Ren Chen,
International Journal of Modern Physics D, 20, (8), pp.
1441-1451, 2011, AUG 2011.
92. SDSS J133401.39+331534.3: A NEW SUBARCSECONDGRAVITATIONALLY LENSED QUASAR,
Cristian E Rusu, Masamune Oguri, Naohisa Inada, Issha
Kayo, Masanori Iye, Yutaka Hayano, Shin Oya, Masayuki
Hattori, Yoshihiko Saito, Meguru Ito, Yosuke Minowa,
Tae-Soo Pyo, Hiroshi Terada, Hideki Takami, Makoto
Watanabe,
Astrophysical Journal, 738, (1), 30, 2011, SEP 1 2011.
93. EFFECTS OF BIASES IN VIRIAL MASS ESTIMATIONON COSMIC SYNCHRONIZATION OF QUASAR
ACCRETION,
Charles L Steinhardt,
Astrophysical Journal, 738, (1), 110, 2011, SEP 1 2011.
94. Herschel Detects a Massive Dust Reservoir in Supernova
1987A,M Matsuura, E Dwek, M Meixner, M Otsuka, B Babler, M.
J Barlow, J Roman-Duval, C Engelbracht, K Sandstrom,
M Lakicevic, J. Th van Loon, G Sonneborn, G. C Clayton,

96. COLORS OF A SECOND EARTH. II. EFFECTS OF
CLOUDS ON PHOTOMETRIC CHARACTERIZATIONOF EARTHLIKE EXOPLANETS,
Yuka Fujii, Hajime Kawahara, Yasushi Suto, Satoru
Fukuda, Teruyuki Nakajima, Timothy A Livengood,
Edwin L Turner,
Astrophysical Journal, 738, (2), 184, 2011, SEP 10 2011.
97. Measurement of the B-8 solar neutrino flux with the
KamLAND liquid scintillator detector,
S Abe, K Furuno, A Gando, Y Gando, K Ichimura, H
Ikeda, K Inoue, Y Kibe, WKimura, Y Kishimoto, M
Koga, Y Minekawa, T Mitsui, T Morikawa, N Nagai,
K Nakajima, K Nakamura, M Nakamura, K Narita, I
Shimizu, Y Shimizu, J Shirai, F Suekane, A Suzuki,
H Takahashi, N Takahashi, Y Takemoto, K Tamae,
H Watanabe, B. D Xu, H Yabumoto, E Yonezawa, H
Yoshida, S Yoshida, S Enomoto, A Kozlov, H Murayama,
C Grant, G Keefer, D McKee, A Piepke, T. I Banks, T
Bloxham, J. A Detwiler, S. J Freedman, B. K Fujikawa, K
Han, R Kadel, T O’Donnell, H. M Steiner, L. A Winslow,
D. A Dwyer, C Mauger, R. D McKeown, C Zhang, B. E
Berger, C. E Lane, J Maricic, T Miletic, M Batygov, J. G
Learned, S Matsuno, S Pakvasa, M Sakai, G. A HortonSmith, A Tang, K. E Downum, G Gratta, K Tolich,
Y Efremenko, Y Kamyshkov, O Perevozchikov, H. J
Karwowski, D. M Markoff, W Tornow, K. M Heeger, F
Piquemal, J-S Ricol, M. P Decowski,
Physical Review C, 84, (3), 035804, 2011, SEP 13 2011.
98. Shadows of colliding black holes,
Daisuke Nitta, Takeshi Chiba, Naoshi Sugiyama,
Physical Review D, 84, (6), 063008, 2011, SEP 14 2011.
99. Sneutrino inflation with asymmetric dark matter,
Naoyuki Haba, Shigeki Matsumoto, Ryosuke Sato,
Physical Review D, 84, (5), 055016, 2011, SEP 16 2011.
100. Nonlinear superhorizon perturbations in Horava-Lifshitz
gravity,
Keisuke Izumi, Shinji Mukohyama,
Physical Review D, 84, (6), 064025, 2011, SEP 20 2011.
101. THE POSTERIOR DISTRIBUTION OF sin(i) VALUESFOR EXOPLANETS WITH M-T sin(i) DETERMINEDFROM RADIAL VELOCITY DATA,
Shirley Ho, Edwin L Turner,
Astrophysical Journal, 739, (1), 26, 2011, SEP 20 2011.
102. THE ATACAMA COSMOLOGY TELESCOPE:
COSMOLOGICAL PARAMETERS FROM THE 2008
POWER SPECTRUM,
J. Dunkley, R. Hlozek, J. Sievers, V. Acquaviva, P.
A. R. Ade, P. Aguirre, M. Amiri, J. W. Appel, L. F.
Barrientos, E. S. Battistelli, J. R. Bond, B. Brown, B.
Burger, J. Chervenak, S. Das, M. J. Devlin, S. R. Dicker,
W. Bertrand Doriese, R. Duenner, T. Essinger-Hileman,
R. P. Fisher, J. W. Fowler, A. Hajian, M. Halpern, M.
Hasselfield, C. Hernandez-Monteagudo, G. C. Hilton, M.
Hilton, A. D. Hincks, K. M. Huffenberger, D. H. Hughes,
J. P. Hughes, L. Infante, K. D. Irwin, J. B. Juin, M. Kaul,
J. Klein, A. Kosowsky, J. M. Lau, M. Limon, Y-T. Lin, R.
H. Lupton, T. A. Marriage, D. Marsden, P. Mauskopf, F.
Menanteau, K. Moodley, H. Moseley, C. B. Netterfield, M.
D. Niemack, M. R. Nolta, L. A. Page,

IPMU Annual Report 2011

Publications

68. Direct detection of electroweak-interacting dark matter,
Junji Hisano, Koji Ishiwata, Natsumi Nagata, Tomohiro
Takesako,
Journal of High Energy Physics, (7), 005, 2011, JUL 2011.

87103. Hermitian flavor violation,
Jason L Evans, Brian Feldstein, William Klemm, Hitoshi
Murayama, Tsutomu T Yanagida,
Physics Letters B, 703, (5), pp. 599-605, 2011, SEP 26
2011.
104. LIGHT GAUGINO PROBLEM IN DIRECT GAUGEMEDIATION,
Yutaka Ookouchi,International Journal of Modern Physics A, 26, (24), pp.
4153-4170, 2011, SEP 30 2011.
105. SDSS-III: MASSIVE SPECTROSCOPIC SURVEYS OF
THE DISTANT UNIVERSE, THE MILKY WAY, AND
EXTRA-SOLAR PLANETARY SYSTEMS,
Daniel J Eisenstein, David H Weinberg, Eric Agol,
Hiroaki Aihara, Carlos Allende Prieto, Scott F Anderson,
James A Arns, Eric Aubourg, Stephen Bailey, Eduardo
Balbinot, Robert Barkhouser, Timothy C Beers, Andreas
A Berlind, Steven J Bickerton, Dmitry Bizyaev, Michael
R Blanton, John J Bochanski, Adam S Bolton, Casey T
Bosman, Jo Bovy, W. N Brandt, Ben Breslauer, Howard
J Brewington, J Brinkmann, Peter J Brown, Joel R
Brownstein, Dan Burger, Nicolas G Busca, Heather
Campbell, Phillip A Cargile, William C Carithers, Joleen
K Carlberg, Michael A Carr, Liang Chang, Yanmei
Chen, Cristina Chiappini, Johan Comparat, Natalia
Connolly, Marina Cortes, Rupert A. C Croft, Katia
Cunha, Luiz N da Costa, James R. A Davenport, Kyle
Dawson, Nathan De Lee, Gustavo F. Porto de Mello,
Fernando de Simoni, Janice Dean, Saurav Dhital, Anne
Ealet, Garrett L Ebelke, Edward M Edmondson, Jacob
M Eiting, Stephanie Escoffier, Massimiliano Esposito,
Michael L Evans, Xiaohui Fan, Bruno Femenia Castella,
Leticia Dutra Ferreira, Greg Fitzgerald, Scott W Fleming,
Andreu Font-Ribera, Eric B Ford, Peter M Frinchaboy,
Ana Elia Garcia Perez, B. Scott Gaudi, Jian Ge, Luan
Ghezzi, Bruce A Gillespie, G Gilmore, Leo Girardi,
J. Richard Gott, Andrew Gould, Eva K Grebel, JamesE Gunn, Jean-Christophe Hamilton, Paul Harding,DavidWHarris, Suzanne L Hawley, Frederick R Hearty,
Joseph F Hennawi, Jonay I Gonzalez Hernandez, Shirley
Ho, David W Hogg, Jon A Holtzman, Klaus Honscheid,
Naohisa Inada, Inese I Ivans, Linhua Jiang, Peng Jiang,
Jennifer A Johnson, Cathy Jordan, Wendell P Jordan,
Guinevere Kauffmann, Eyal Kazin, David Kirkby, MarkA Klaene, G. R Knapp, Jean-Paul Kneib, C. S Kochanek,
Lars Koesterke, Juna A Kollmeier, Richard G Kron,
Hubert Lampeitl, Dustin Lang, James E Lawler, JeanMarc Le Goff, Brian L Lee, Young Sun Lee, Jarron M
Leisenring, Yen-Ting Lin, Jian Liu, Daniel C Long, Craig
P Loomis, Sara Lucatello, Britt Lundgren, Robert H
Lupton, Bo Ma, Zhibo Ma, Nicholas MacDonald, Claude
Mack, Suvrath Mahadevan, Marcio A. G Maia, Steven R
Majewski, Martin Makler, Elena Malanushenko, Viktor
Malanushenko, Rachel Mandelbaum, Claudia Maraston,Daniel Margala, Paul Maseman, Karen L Masters,
Cameron K McBride, Patrick McDonald, Ian D McGreer,Richard G McMahon, Olga Mena Requejo, Brice Menard,
Jordi Miralda-Escude, Heather L Morrison, Fergal
Mullally, Demitri Muna, Hitoshi Murayama, Adam D
Myers, Tracy Naugle, Angelo Fausti Neto, Duy Cuong
Nguyen, Robert C Nichol, David L Nidever, Robert W
O’Connell, Ricardo L. C Ogando, Matthew D Olmstead,
Daniel J Oravetz, Nikhil Padmanabhan, Martin Paegert,
Nathalie Palanque-Delabrouille, Kaike Pan, Parul
Pandey, John K Parejko, Isabelle Paris, Paulo Pellegrini,
Joshua Pepper, Will J Percival, Patrick Petitjean, RobertPfaffenberger, Janine Pforr, Stefanie Phleps, Christophe
Pichon, Matthew M Pieri, Francisco Prada, Adrian M
Price-Whelan, M. Jordan Raddick, Beatriz H. F Ramos,

88

IPMU Annual Report 2011

I. Neill Reid, Celine Reyle, James Rich, Gordon T
Richards, George H Rieke, Marcia J Rieke, Hans-Walter
Rix, Annie C Robin, Helio J Rocha-Pinto, Constance M
Rockosi, Natalie A Roe, Emmanuel Rollinde, Ashley J
Ross, Nicholas P Ross, Bruno Rossetto, Ariel G Sanchez,
Basilio Santiago, Conor Sayres, Ricardo Schiavon, DavidJ Schlegel, Katharine J Schlesinger, Sarah J Schmidt,
Donald P Schneider, Kris Sellgren, Alaina Shelden,
Erin Sheldon, Matthew Shetrone, Yiping Shu, John D
Silverman, Jennifer Simmerer, Audrey E Simmons,Thirupathi Sivarani, M. F Skrutskie, Anze Slosar, Stephen
Smee, Verne V Smith, Stephanie A Snedden, Keivan
G Stassun, Oliver Steele, Matthias Steinmetz, Mark H
Stockett, Todd Stollberg, Michael A Strauss, Alexander S
Szalay, Masayuki Tanaka, Aniruddha R Thakar, Daniel
Thomas, Jeremy L Tinker, Benjamin M Tofflemire, Rita
Tojeiro, Christy A Tremonti, Mariana Vargas Magana,
Licia Verde, Nicole P Vogt, David A Wake, Xiaoke Wan,
Ji Wang, Benjamin A Weaver, Martin White, Simon D. M
White, John C Wilson, John P Wisniewski, W. Michael
Wood-Vasey, Brian Yanny, Naoki Yasuda, Christophe
Yeche, Donald G York, Erick Young, Gail Zasowski, Idit
Zehavi, Bo Zhao,
Astronomical Journal, 142, (3), 72, 2011, SEP 2011.
106. Generalized G-Inflation - Inflation with the Most General
Second-Order Field Equations, Tsutomu Kobayashi,
Masahide Yamaguchi, Jun’ichi Yokoyama,
Progress of Theoretical Physics, 126, (3), pp. 511-529,
2011, SEP 2011.
107. Partial radiogenic heat model for Earth revealed bygeoneutrino measurements,
A Gando, Y Gando, K Ichimura, H Ikeda, K Inoue, Y
Kibe, Y Kishimoto, M Koga, Y Minekawa, T Mitsui, T
Morikawa, N Nagai, K Nakajima, K Nakamura, K Narita,
I Shimizu, Y Shimizu, J Shirai, F Suekane, A Suzuki,
H Takahashi, N Takahashi, Y Takemoto, K Tamae, H
Watanabe, B. D Xu, H Yabumoto, H Yoshida, S Yoshida,
S Enomoto, A Kozlov, H Murayama, C Grant, G Keefer,
A Piepke, T. I Banks, T Bloxham, J. A Detwiler, S. J
Freedman, B. K Fujikawa, K Han, R Kadel, T O’Donnell,
H. M Steiner, D. A Dwyer, R. D McKeown, C Zhang, B.
E Berger, C. E Lane, J Maricic, T Miletic, M Batygov,
J. G Learned, S Matsuno, M Sakai, G. A Horton-Smith,
K. E Downum, G Gratta, K Tolich, Y Efremenko, O
Perevozchikov, H. J Karwowski, D. M Markoff, W
Tornow, K. M Heeger, M. P Decowski,
Nature Geoscience, 4, (9), pp. 647-651, 2011, SEP 2011.
108. Direct Detection of Vector Dark Matter,
Junji Hisano, Koji Ishiwata, Natsumi Nagata, Masato
Yamanaka,
Progress of Theoretical Physics, 126, (3), pp. 435-456,
2011, SEP 2011.
109. Optimizing weak lensing mass estimates for cluster
profile uncertainty,
D Gruen, G. M Bernstein, T. Y Lam, S Seitz, Monthly
Notices of the Royal Astronomical Society,416, (2), pp. 1392-1400, 2011, SEP 2011.
110. Likelihood reconstruction method of real-space densityand velocity power spectra from a redshift galaxy survey,
Jiayu Tang, Issha Kayo, Masahiro Takada,Monthly Notices of the Royal Astronomical Society, 416,(3), pp. 2291-2310, 2011, SEP 2011.
111. The non-linear evolution of baryonic overdensities in theearly universe: initial conditions of numerical simulations,
Smadar Naoz, Naoki Yoshida, Rennan Barkana,Monthly Notices of the Royal Astronomical Society, 416,(1), pp. 232-241, 2011, SEP 2011.
112. A RELATION FOR GROMOV-WITTEN INVARIANTS
OF LOCAL CALABI-YAU THREEFOLDS,
Siu-Cheong Lau, Naichung Conan Leung, Baosen Wu,
Mathematical Research Letters, 18, (5), pp. 943-956,
2011, SEP 2011.

113. Formulation and constraints on decaying dark matter withfinite mass daughter particles,
Shohei Aoyama, Kiyotomo Ichiki, Daisuke Nitta, Naoshi
Sugiyama,
Journal of Cosmology and Astroparticle Physics, (9), 025,
2011, SEP 2011.
114. Study of gravitational radiation from cosmic domain
walls,
Masahiro Kawasaki, Ken’ichi Saikawa,
Journal of Cosmology and Astroparticle Physics, (9), 008,
2011, SEP 2011.
115. Seiberg-Witten geometries revisited,
Yuji Tachikawa, Seiji Terashima,
Journal of High Energy Physics, (9), 010, 2011, SEP 2011.
116. Populations III.1 and III.2 gamma-ray bursts: constraints
on the event rate for future radio and X-ray surveys,
R. S de Souza, N Yoshida, K Ioka,
Astronomy & Astrophysics, 533, A32, 2011, SEP 2011.
117. CURVE COUNTING INVARIANTS AROUND THE
CONIFOLD POINT,
Yukinobu Toda,
Journal of Differential Geometry, 89, (1), pp.
133-184, 2011, SEP 2011.
118. Moduli spaces of stable quotients and wallcrossing
phenomena,
Yukinobu Toda,
Compositio Mathematica, 147, (5), pp. 1479-1518, 2011,
SEP 2011.
119. Complementarity of future dark energy probes,
Jiayu Tang, Filipe B. Abdalla, Jochen Weller,
Monthly Notices of the Royal Astronomical Society, 416,(3), pp. 2212-2232, 2011, SEP 2011.
120. Temporal enhancement of super-horizon curvature
perturbations from decays of two curvatons and its
cosmological consequences,
Teruaki Suyama, Jun’ichi Yokoyama,
Physical Review D, 84, (8), 083511, 2011, OCT 11 2011.
121. Monoids in the fundamental groups of the complement oflogarithmic free divisors in C-3,
Kyoji Saito, Tadashi Ishibe,
Journal of Algebra, 344, (1), pp. 137-160, 2011, OCT 15
2011.
122. Higgs mass and muon anomalous magnetic moment insupersymmetric models with vectorlike matters,
Motoi Endo, Koichi Hamaguchi, Sho Iwamoto,
Norimi Yokozaki,
Physical Review D, 84, (7), 075017, 2011, OCT 19 2011.
123. A scalar boson as a messenger of new physics,
Ryosuke Sato, Satoshi Shirai, Tsutomu T Yanagida,
Physics Letters B, 704, (5), pp. 490-494, 2011,
OCT 25 2011.
124. High-energy photon-hadron scattering in holographic
QCD,
Ryoichi Nishio, Taizan Watari,
Physical Review D, 84, (7), 075025, 2011, OCT 31 2011.
125. Supernovae in the Subaru Deep Field: the rate and delaytime distribution of Type Ia supernovae out to redshift 2,
O Graur, D Poznanski, D Maoz, N Yasuda, T Totani, M
Fukugita, A. V Filippenko, R. J Foley, J. M Silverman, A
Gal-Yam, A Horesh, B. T Jannuzi,
Monthly Notices of the Royal Astronomical Society, 417,(2), pp. 916-940, 2011, OCT 2011.

126. Determination of intergalactic magnetic fields fromgamma ray data,
Warren Essey, Shin’ichiro Ando, Alexander Kusenko,
Astroparticle Physics, 35, (3), pp. 135-139, 2011, OCT
2011.
127. Modification of the halo mass function by kurtosis
associated with primordial non-Gaussianity,
Shuichiro Yokoyama, Naoshi Sugiyama, Saleem Zaroubi,
Joseph Silk,
Monthly Notices of the Royal Astronomical Society, 417,(2), pp. 1074-1087, 2011, OCT 2011.
128. Wall Crossing as Seen by Matrix Models,Hirosi Ooguri, Piotr Sulkowski, Masahito Yamazaki,
Communications in Mathematical Physics, 307, (2), pp.
429-462, 2011, OCT 2011.
129. Differentiating CDM and baryon isocurvature models
with 21 cm fluctuations,
Masahiro Kawasaki, Toyokazu Sekiguchi, Tomo
Takahashi,
Journal of Cosmology and Astroparticle Physics, (10),028, 2011, OCT 2011.
130. Special functions associated with a certain fourth-orderdifferential equation,
Joachim Hilgert, Toshiyuki Kobayashi, Gen Mano, Jan
Moellers,
Ramanujan Journal, 26, (1), pp. 1-34, 2011, OCT 2011.
131. A study of the color diversity around maximum light in
Type Ia supernovae,
R Cartier, F Foerster, P Coppi, M Hamuy, K Maeda, GPignata, G Folatelli,
Astronomy & Astrophysics, 534, L15, 2011, OCT 2011.
132. The evolution of quiescent galaxies at high redshifts(z=1.4),
H Dominguez Sanchez, F Pozzi, C Gruppioni, A Cimatti,
O Ilbert, L Pozzetti, H McCracken, P Capak, E Le Floch,
M Salvato, G Zamorani, C. M Carollo, T Contini, J. -P
Kneib, O Le Fevre, S. J Lilly, V Mainieri, A Renzini, M
Scodeggio, S Bardelli, M Bolzonella, A Bongiorno, K
Caputi, G Coppa, O Cucciati, S de la Torre, L de Ravel,
P Franzetti, B Garilli, A Iovino, P Kampczyk, C Knobel,
K Kovac, F Lamareille, J. -F Le Borgne, V Le Brun, C
Maier, M Mignoli, R Pello, Y Peng, E Perez-Montero, E
Ricciardelli, J. D Silverman, M Tanaka, L. A. M Tasca, L
Tresse, D Vergani, E Zucca,
Monthly Notices of the Royal Astronomical Society, 417,(2), pp. 900-915, 2011, OCT 2011.
133. Higher derivative corrections to holographic entanglement
entropy for AdS solitons,
Noriaki Ogawa, Tadashi Takayanagi,
Journal of High Energy Physics, (10), 147, 2011, OCT
2011.
134. Scale dependences of local form non-Gaussianity
parameters from a DBI isocurvature field,
Qing-Guo Huang, Chunshan Lin,
Journal of Cosmology and Astroparticle Physics, (10),005, 2011, OCT 2011.
135. Low-scale supersymmetry from inflation,
Kazunori Nakayama, Fuminobu Takahashi,
Journal of Cosmology and Astroparticle Physics, (10),033, 2011, OCT 2011.

Publications

L. Parker, B. Partridge, B. Reid, N. Sehgal, B. Sherwin,
D. N. Spergel, S. T. Staggs, D. S. Swetz, E. R. Switzer, R.
Thornton, H. Trac, C. Tucker, R. Warne, E. Wollack, Y.
Zhao,
Astrophysical Journal, 739, (1), 52, 2011, SEP 20 2011.

136. Measurement of the temperature dependence of pulse
lengths in an n-type germanium detector,
I Abt, A Caldwell, J Liu, B Majorovits, O Volynets,
European Physical Journal-Applied Physics, 56, (1),10104, 2011, OCT 2011.

IPMU Annual Report 201189

138. THE POPULATION OF HIGH-REDSHIFT ACTIVEGALACTIC NUCLEI IN THE CHANDRA-COSMOSSURVEY,F Civano, M Brusa, A Comastri, M Elvis, M Salvato, G
Zamorani, P Capak, F Fiore, R Gilli, H Hao, H Ikeda, Y
Kakazu, J. S Kartaltepe, D Masters, T Miyaji, M Mignoli,
S Puccetti, F Shankar, J Silverman, C Vignali, A Zezas, A.
M Koekemoer,
Astrophysical Journal, 741, (2), 91, 2011, NOV 10 2011.
139. Saving fourth generation and baryon number by living
long,
Hitoshi Murayama, Vikram Rentala, Jing Shu, Tsutomu T
Yanagida,
Physics Letters B, 705, (3), pp. 208-211, 2011, NOV 112011.
140. Primordial Non-Gaussianities of Gravitational Waves
in the Most General Single-Field Inflation Model with
Second-Order Field Equations, Xian Gao, Tsutomu
Kobayashi, Masahide Yamaguchi, Jun’ichi Yokoyama,
Physical Review Letters, 107, (21), 211301, 2011, NOV 14
2011.
141. Improved discovery of a nearly degenerate model:
Minimal universal extra dimension model using MT2 at
the LHC,
Hitoshi Murayama, Mihoko M Nojiri, Kohsaku Tobioka,
Physical Review D, 84, (9), 094015, 2011, NOV 14 2011.
142. Relatively heavy Higgs boson in more generic gauge
mediation,
Jason L Evans, Masahiro Ibe, Tsutomu T Yanagida,
Physics Letters B, 705, (4), pp. 342-348, 2011, NOV 17
2011.
143. Non-anomalous discrete R-symmetry, extra matters, andenhancement of the lightest SUSY Higgs mass,
Masaki Asano, Takeo Moroi, Ryosuke Sato, Tsutomu T
Yanagida,
Physics Letters B, 705, (4), pp. 337-341, 2011, NOV 17
2011.
144. 1Updating the neutron electric dipole moment in a fourth
generation standard model,
Junji Hisano, Wei-Shu Hou, Fanrong Xu,
Physical Review D, 84, (9), 093005, 2011, NOV 18 2011.
145. PROBABILITY DISTRIBUTION FUNCTIONS OFCOSMOLOGICAL LENSING: CONVERGENCE,SHEAR, AND MAGNIFICATION,
Ryuichi Takahashi, Masamune Oguri, Masanori Sato,
Takashi Hamana,
Astrophysical Journal, 742, (1), 15, 2011, NOV 20 2011.
146. Open FRW universes and self-acceleration from nonlinear
massive gravity,
A. Emir Guemruekcueoglu, Chunshan Lin, Shinji
Mukohyama,
Journal of Cosmology and Astroparticle Physics, (11),030, 2011, NOV 2011.
147. THE CARNEGIE SUPERNOVA PROJECT: SECOND
PHOTOMETRY DATA RELEASE OF LOW-REDSHIFTTYPE Ia SUPERNOVAE,
Maximilian D Stritzinger, M. M Phillips, Luis N Boldt,
Chris Burns, Abdo Campillay, Carlos Contreras, Sergio
Gonzalez, Gaston Folatelli, Nidia Morrell, Wojtek
Krzeminski, Miguel Roth, Francisco Salgado, D. L DePoy,
Mario Hamuy, Wendy L Freedman, Barry F Madore,
J. L Marshall, Sven E Persson, Jean-Philippe Rheault,
Nicholas B Suntzeff, Steven Villanueva, Weidong Li,
Alexei V Filippenko,
Astronomical Journal, 142, (5), 156, 2011, NOV 2011.
90

IPMU Annual Report 2011148. Cosmological and astrophysical neutrino massmeasurements,
K. N Abazajian, E Calabrese, A Cooray, F De Bernardis,
S Dodelson, A Friedland, G. M Fuller, S Hannestad, B.
G Keating, E. V Linder, C Lunardini, A Melchiorri, R
Miquel, E Pierpaoli, J Pritchard, P Serra, M Takada, Y. Y.
Y Wong,Astroparticle Physics, 35, (4), pp. 177-184, 2011, NOV
2011.
149. Black hole accretion and host galaxies of obscured
quasars in XMM-COSMOS,
V Mainieri, A Bongiorno, A Merloni, M Aller, M Carollo,
K Iwasawa, A. M Koekemoer, M Mignoli, J. D Silverman,
M Bolzonella, M Brusa, A Comastri, R Gilli, C Halliday,
O Ilbert, E Lusso, M Salvato, C Vignali, G Zamorani, T
Contini, J. -P Kneib, O Le Fevre, S Lilly, A Renzini, M
Scodeggio, I Balestra, S Bardelli, K Caputi, G Coppa, O
Cucciati, S de la Torre, L de Ravel, P Franzetti, B Garilli,
A Iovino, P Kampczyk, C Knobel, K Kovac, F Lamareille,
J. -F Le Borgne, V Le Brun, C Maier, P Nair, R Pello,
Y Peng, E. Perez Montero, L Pozzetti, E Ricciardelli, M
Tanaka, L Tasca, L Tresse, D Vergani, E Zucca, H Aussel,
P Capak, N Cappelluti, M Elvis, F Fiore, G Hasinger, C
Impey, E Le Floc’h, N Scoville, Y Taniguchi, J Trump,
Astronomy & Astrophysics, 535, A80, 2011, NOV 2011.
150. Aspects of AdS/BCFT,
Mitsutoshi Fujita, Tadashi Takayanagi, Erik Tonni,
Journal of High Energy Physics, (11), 043, 2011, NOV
2011.
151. On S-duality of 5d super Yang-Mills on S-1,
Yuji Tachikawa,
Journal of High Energy Physics, (11), 123, 2011, NOV
2011.
152. Probing cosmic star formation up to z=9.4 with gammaray bursts,
E. E. O Ishida, R. S de Souza, A Ferrara,
Monthly Notices of the Royal Astronomical Society, 418,(1), pp. 500-504, 2011, NOV 2011.
153. The bimodality of the 10k zCOSMOS-bright galaxies
up to z similar to 1: a new statistical and portableclassification based on optical galaxy properties,
G Coppa, M Mignoli, G Zamorani, S Bardelli, S. J
Lilly, M Bolzonella, M Scodeggio, D Vergani, P Nair, L
Pozzetti, A Cimatti, E Zucca, C. M Carollo, T Contini,
O Le Fevre, A Renzini, V Mainieri, A Bongiorno, K. I
Caputi, O Cucciati, S de la Torre, L de Ravel, P Franzetti,
B Garilli, P Memeo, A Iovino, P Kampczyk, J.-P Kneib,
C Knobel, A. M Koekemoer, K Kovac, F Lamareille, J. -F
le Borgne, V le Brun, C Maier, R Pello, Y Peng, E PerezMontero, E Ricciardelli, C Scarlata, J. D Silverman, M
Tanaka, L Tasca, L Tresse, U Abbas, D Bottini, P Capak,
A Cappi, P Cassata, M Fumana, L Guzzo, A Leauthaud, D
Maccagni, C Marinoni, B Meneux, P Oesch, C Porciani,
R Scaramella, N Scoville,
Astronomy & Astrophysics, 535, A10, 2011, NOV 2011.
154. On the effects of microphysical grain properties on theyields of carbonaceous dust from Type II supernovae,
David W Fallest, Takaya Nozawa, Ken’ichi Nomoto,
Hideyuki Umeda, Keiichi Maeda, Takashi Kozasa,
Davide Lazzati,Monthly Notices of the Royal Astronomical Society, 418,(1), pp. 571-582, 2011, NOV 2011.
155. Extinction law in ultraluminous infrared galaxies at z
similar to 1,
T Shimizu, K Kawara, H Sameshima, N Ienaka, T
Nozawa, T Kozasa,
Monthly Notices of the Royal Astronomical Society, 418,(1), pp. 625-637, 2011, NOV 2011.

156. On the use of X-ray and gamma-ray telescopes for
identifying the origin of electrons and positrons observedby ATIC, Fermi, and PAMELA,
Antoine Calvez, Warren Essey, Malcolm Fairbairn,
Alexander Kusenko, Michael Loewenstein,
Astroparticle Physics, 35, (4), pp. 185-191, 2011, NOV
2011.
157. Gamma-Ray Bursts and magnetar-forming Supernovae,
Ken’ichi Nomoto, Keiichi Maeda, Masaomi Tanaka,
Tomoharu Suzuki,
Astrophysics and Space Science, 336, (1), pp. 129-137,
2011, NOV 2011.
158. GALAXIES IN X-RAY GROUPS. I. ROBUSTMEMBERSHIP ASSIGNMENT AND THE IMPACT OF
GROUP ENVIRONMENTS ON QUENCHING,
Matthew R George, Alexie Leauthaud, Kevin Bundy,Alexis Finoguenov, Jeremy Tinker, Yen-Ting Lin, SimonaMei, Jean-Paul Kneib, Herve Aussel, Peter S Behroozi,
Michael T Busha, Peter Capak, Lodovico Coccato,
Giovanni Covone, Cecile Faure, Stephanie L Fiorenza,
Olivier Ilbert, Emeric Le Floc’h, Anton M Koekemoer,
Masayuki Tanaka, Risa H Wechsler, Melody Wolk,
Astrophysical Journal, 742, (2), 125, 2011, DEC 1 2011.
159. AN INDIRECT SEARCH FOR WEAKLYINTERACTING MASSIVE PARTICLES IN THE SUN
USING 3109.6 DAYS OF UPWARDGOING MUONS IN
SUPER-KAMIOKANDE,
T Tanaka, K Abe, Y Hayato, T Iida, J Kameda, Y Koshio,
Y Kouzuma, M Miura, S Moriyama, M Nakahata, S
Nakayama, Y Obayashi, H Sekiya, M Shiozawa, Y
Suzuki, A Takeda, Y Takenaga, K Ueno, K Ueshima, S
Yamada, T Yokozawa, C Ishihara, S Hazama, H Kaji,
T Kajita, K Kaneyuki, T McLachlan, K Okumura, Y
Shimizu, N Tanimoto, F Dufour, E Kearns, M Litos, J.
L Raaf, J. L Stone, L. R Sulak, J. P Cravens, K Bays, W.
R Kropp, S Mine, C Regis, M. B Smy, H. W Sobel, K.
S Ganezer, J Hill, W. E Keig, J. S Jang, J. Y Kim, I. T
Lim, J. B Albert, K Scholberg, C. W Walter, R Wendell,
T Wongjirad, T Ishizuka, S Tasaka, J. G Learned, S
Matsuno, S Smith, K Martens, M Vagins, Y Watanabe, T
Hasegawa, T Ishida, T Ishii, T Kobayashi, T Nakadaira,K Nakamura, K Nishikawa, H Nishino, Y Oyama, K
Sakashita, T Sekiguchi, T Tsukamoto, A. T Suzuki, Y
Takeuchi, M Ikeda, A Minamino, T Nakaya, L Labarga,
Y Fukuda, Y Itow, G Mitsuka, C. K Jung, C McGrew, G
Lopez, C Yanagisawa, N Tamura, H Ishino, A Kibayashi,
M Sakuda, Y Kuno, M Yoshida, S. B Kim, B. S Yang, H
Okazawa, Y Choi, K Nishijima, Y Yokosawa, M Koshiba,
Y Totsuka, M Yokoyama, S Chen, Y Heng, Z Yang, H
Zhang, D Kielczewska, P Mijakowski, K Connolly, M
Dziomba, E Thrane, R. J Wilkes,
Astrophysical Journal, 742, (2), 78, 2011, DEC 1 2011.
160. IMPROVED MODELING OF THE ROSSITERMcLAUGHLIN EFFECT FOR TRANSITINGEXOPLANETS,
Teruyuki Hirano, Yasushi Suto, Joshua NWinn, Atsushi
Taruya, Norio Narita, Simon Albrecht, Bun’ei Sato,
Astrophysical Journal, 742, (2), 69, 2011, DEC 1 2011.
161. Protostellar Feedback Halts the Growth of the First Stars
in the Universe,
Takashi Hosokawa, Kazuyuki Omukai, Naoki Yoshida,
Harold W Yorke,
Science, 334, (6060), pp. 1250-1253, 2011, DEC 2 2011.
162. Discrimination of new physics models with theInternational Linear Collider,
Masaki Asano, Tomoyuki Saito, Taikan Suehara, Keisuke
Fujii, R. S Hundi, Hideo Itoh, Shigeki Matsumoto,
Nobuchika Okada, Yosuke Takubo, Hitoshi Yamamoto,Physical Review D, 84, (11), 115003, 2011, DEC 2 2011.

163. Direct detection of dark matter degenerate with coloredparticles in mass,
Junji Hisano, Koji Ishiwata, Natsumi Nagata,
Physics Letters B, 706, (2-3), pp. 208-212, 2011, DEC 62011.
164. Search for Differences in Oscillation Parameters for
Atmospheric Neutrinos and Antineutrinos at SuperKamiokande,
K Abe, Y Hayato, T Iida, M Ikeda, K Iyogi, J Kameda, YKoshio, Y Kozuma, M Miura, S Moriyama, M Nakahata,
S Nakayama, Y Obayashi, H Sekiya, M Shiozawa, Y
Suzuki, A Takeda, Y Takenaga, Y Takeuchi, K Ueno,
K Ueshima, H Watanabe, S Yamada, T Yokozawa, C
Ishihara, H Kaji, K. P Lee, T Kajita, K Kaneyuki, T
McLachlan, K Okumura, Y Shimizu, N Tanimoto, K
Martens, M. R Vagins, L Labarga, L. M Magro, F Dufour,
E Kearns, M Litos, J. L Raaf, J. L Stone, L. R Sulak, M
Goldhaber, K Bays, W. R Kropp, S Mine, C Regis, M.
B Smy, H. W Sobel, K. S Ganezer, J Hill, W. E Keig, J.
S Jang, J. Y Kim, I. T Lim, J. B Albert, K Scholberg, C.
W Walter, R Wendell, T. M Wongjirad, S Tasaka, J. G
Learned, S Matsuno, T Hasegawa, T Ishida, T Ishii, T
Kobayashi, T Nakadaira, K Nakamura, K Nishikawa,
H Nishino, Y Oyama, K Sakashita, T Sekiguchi, T
Tsukamoto, A. T Suzuki, A Minamino, T Nakaya, Y
Fukuda, Y Itow, G Mitsuka, T Tanaka, C. K Jung, I
Taylor, C Yanagisawa, H Ishino, A Kibayashi, S Mino, T
Mori, M Sakuda, H Toyota, Y Kuno, S. B Kim, B. S Yang,
T Ishizuka, H Okazawa, Y Choi, K Nishijima, M Koshiba,
M Yokoyama, Y Totsuka, S Chen, Y Heng, Z Yang, H
Zhang, D Kielczewska, P Mijakowski, K Connolly, M
Dziomba, R. J Wilkes,
Physical Review Letters, 107, (24), 241801, 2011, DEC 72011.
165. Non-Gaussianity from curvatons revisited,
Masahiro Kawasaki, Takeshi Kobayashi, Fuminobu
Takahashi,
Physical Review D, 84, (12), 123506, 2011, DEC 8 2011.
166. THE IMPACT OF GALAXY INTERACTIONS ON
ACTIVE GALACTIC NUCLEUS ACTIVITY IN
zCOSMOS,J. D Silverman, P Kampczyk, K Jahnke, R Andrae, S.
J Lilly, M Elvis, F Civano, V Mainieri, C Vignali, G
Zamorani, P Nair, O Le Fevre, L de Ravel, S Bardelli,
A Bongiorno, M Bolzonella, A Cappi, K Caputi, C. M
Carollo, T Contini, G Coppa, O Cucciati, S de la Torre,
P Franzetti, B Garilli, C Halliday, G Hasinger, A Iovino,
C Knobel, A. M Koekemoer, K Kovac, F Lamareille, J-F
Le Borgne, V Le Brun, C Maier, M Mignoli, R Pello, E
Perez-Montero, E Ricciardelli, Y Peng, M Scodeggio, M
Tanaka, L Tasca, L Tresse, D Vergani, E Zucca, M Brusa,
N Cappelluti, A Comastri, A Finoguenov, H Fu, R Gilli,
H Hao, L. C Ho, M Salvato,
Astrophysical Journal, 743, (1), 2, 2011, DEC 10 2011.
167. THE RADIAL AND AZIMUTHAL PROFILES OF
MgII ABSORPTION AROUND 0.5 < z < 0.9 zCOSMOSGALAXIES OF DIFFERENT COLORS, MASSES,AND ENVIRONMENTS,
R Bordoloi, S. J Lilly, C Knobel, M Bolzonella, P
Kampczyk, C. M Carollo, A Iovino, E Zucca, T Contini,
J-P Kneib, O Le Fevre, V Mainieri, A Renzini, M
Scodeggio, G Zamorani, I Balestra, S Bardelli, A
Bongiorno, K Caputi, O Cucciati, S de la Torre, L de
Ravel, B Garilli, K Kovac, F Lamareille, J-F Le Borgne,
V Le Brun, C Maier, MMignoli, R Pello, Y Peng, E
PerezMontero, V Presotto, C Scarlata, J Silverman, M
Tanaka, L Tasca, L Tresse, D Vergani, L Barnes, A Cappi,
A Cimatti, G Coppa, C Diener, P Franzetti, A Koekemoer,
C Lopez-Sanjuan, H. J McCracken, M Moresco, P Nair, P
Oesch, L Pozzetti, N Welikala,Astrophysical Journal, 743, (1), 10, 2011, DEC 10 2011.

IPMU Annual Report 2011

Publications

137. STELLAR EVOLUTION CONSTRAINTS ON THE
TRIPLE-alpha REACTION RATE,
Takuma Suda, Raphael Hirschi, Masayuki Y Fujimoto,
Astrophysical Journal, 741, (1), 61, 2011, NOV 1 2011.

91169. Scintillation-only based pulse shape discrimination for
nuclear and electron recoils in liquid xenon,
K Ueshima, K Abe, K Hiraide, S Hirano, Y Kishimoto, K
Kobayashi, Y Koshio, J Liu, K Martens, S Moriyama, M
Nakahata, H Nishiie, H Ogawa, H Sekiya, A Shinozaki,
Y Suzuki, A Takeda, M Yamashita, K Fujii, I Murayama,
S Nakamura, K Otsuka, Y Takeuchi, Y Fukuda, K
Nishijima, D Motoki, Y Itow, K Masuda, Y Nishitani, H
Uchida, S Tasaka, H Ohsumi, Y. D Kim, Y. H Kim, K. B
Lee, M. K Lee, J. S Lee,
Nuclear Instruments & Methods in Physics Research
Section A-Accelerators Spectrometers
Detectors and Associated Equipment, 659, (1), pp. 161168, 2011, DEC 11 2011.
170. Study of nonstandard neutrino interactions withatmospheric neutrino data in Super-Kamiokande I and II,
G Mitsuka, K Abe, Y Hayato, T Iida, M Ikeda, J
Kameda, Y Koshio, M Miura, S Moriyama, M Nakahata,
S Nakayama, Y Obayashi, H Sekiya, M Shiozawa, Y
Suzuki, A Takeda, Y Takenaga, Y Takeuchi, K Ueno, K
Ueshima, H Watanabe, S Yamada, S Hazama, I Higuchi,
C Ishihara, H Kaji, T Kajita, K Kaneyuki, H Nishino, K
Okumura, N Tanimoto, F Dufour, E Kearns, M Litos, J.
L Raaf, J. L Stone, L. R Sulak, M Goldhaber, K Bays, J.
P Cravens, W. R Kropp, S Mine, C Regis, M. B Smy, H.
W Sobel, M. R Vagins, K. S Ganezer, J Hill, W. E Keig,
J. S Jang, J. Y Kim, I. T Lim, J Albert, K Scholberg, C. W
Walter, R Wendell, T Ishizuka, S Tasaka, J. G Learned,
S Matsuno, Y Watanabe, T Hasegawa, T Ishida, T Ishii,
T Kobayashi, T Nakadaira, K Nakamura, K Nishikawa,
Y Oyama, K Sakashita, T Sekiguchi, T Tsukamoto, A. T
Suzuki, A Minamino, T Nakaya, M Yokoyama, Y Fukuda,
Y Itow, T Tanaka, C. K Jung, G Lopez, C McGrew, C
Yanagisawa, N Tamura, Y Idehara, M Sakuda, Y Kuno,
M Yoshida, S. B Kim, B. S Yang, H Okazawa, Y Choi, H.
K Seo, Y Furuse, K Nishijima, Y Yokosawa, M Koshiba,
Y Totsuka, S Chen, J Liu, Y Heng, Z Yang, H Zhang, D
Kielczewska, K Connolly, E Thrane, R. J Wilkes,
Physical Review D, 84, (11), 113008, 2011, DEC 14 2011.
171. Exclusion of a luminous red giant as a companion star tothe progenitor of supernova SN 2011fe,
Weidong Li, Joshua S Bloom, Philipp Podsiadlowski,
Adam A Miller, S. Bradley Cenko,
Saurabh W Jha, Mark Sullivan, D. Andrew
Howell, Peter E Nugent, Nathaniel R Butler,
Eran O Ofek, Mansi M Kasliwal, Joseph W
Richards, Alan Stockton, Hsin-Yi Shih, Lars
Bildsten, Michael M Shara, Joanne Bibby,
Alexei V Filippenko, Mohan Ganeshalingam,
Jeffrey M Silverman, S. R Kulkarni, Nicholas M
Law, Dovi Poznanski, Robert M Quimby, Curtis
McCully, Brandon Patel, Kate Maguire, Ken J
Shen,Nature, 480, (7377), pp. 348-350, 2011, DEC 15
2011.

92

IPMU Annual Report 2011172. Supernova SN 2011fe from an exploding carbonoxygen
white dwarf star,Peter E Nugent, Mark Sullivan, S. Bradley Cenko, Rollin
C Thomas, Daniel Kasen, D. Andrew Howell, David
Bersier, Joshua S Bloom, S. R Kulkarni, Michael T
Kandrashoff, Alexei V Filippenko, Jeffrey M Silverman,
Geoffrey W Marcy, Andrew W Howard, Howard T
Isaacson, Kate Maguire, Nao Suzuki, James E Tarlton,
Yen-Chen Pan, Lars Bildsten, Benjamin J Fulton, Jerod T
Parrent, David Sand, Philipp Podsiadlowski, Federica B
Bianco, Benjamin Dilday, Melissa L Graham, Joe Lyman,
Phil James, Mansi M Kasliwal, Nicholas M Law, Robert
M Quimby, Isobel M Hook, Emma S Walker, Paolo
Mazzali, Elena Pian, Eran O Ofek, Avishay Gal-Yam,
Dovi Poznanski,
Nature, 480, (7377), pp. 344-347, 2011, DEC 15 2011.
173. Adiabatic solution to the Polonyi/moduli problem,
Kazunori Nakayama, Fuminobu Takahashi, Tsutomu T
Yanagida,
Physical Review D, 84, (12), 123523, 2011, DEC 28 2011.
174. Gravitino dark matter and baryon asymmetry from Q-balldecay in gauge mediation,
Shinta Kasuya, Masahiro Kawasaki,
Physical Review D, 84, (12), 123528, 2011, DEC 30 2011.
175. Lyman alpha emitters in cosmological simulations - I.
Lyman alpha escape fraction and statistical properties at
z=3.1,
Ikkoh Shimizu, Naoki Yoshida, Takashi Okamoto,Monthly Notices of the Royal Astronomical Society, 418,(4), pp. 2273-2282, 2011, DEC 2011.
176. Stau kinks at the LHC,
Shoji Asai, Yuya Azuma, Motoi Endo, Koichi Hamaguchi,
Sho Iwamoto,
Journal of High Energy Physics, (12), 041, 2011, DEC
2011.
177. Systematic Survey of the Correlation between Northern
HECR Events and SDSS Galaxies,
Hajime Takami, Takahiro Nishimichi, Katsuhiko Sato,
Progress of Theoretical Physics, 126, (6), pp. 1123-1144,
2011, DEC 2011.
178. Fine features in the primordial power spectrum, Kohei
Kumazaki, Shuichiro Yokoyama, Naoshi Sugiyama,
Journal of Cosmology and Astroparticle Physics, (12),008, 2011, DEC 2011.
179. Resurgent Analysis of the Witten Laplacian in One
Dimension,
Alexander Getmanenko,
Funkcialaj Ekvacioj-Serio Internacia, 54, (3), pp. 383438, 2011, DEC 2011.
180. Orthogonal polynomials associated to a certain fourthorder differential equation,
Joachim Hilgert, Toshiyuki Kobayashi, Gen Mano, Jan
Moellers,
Ramanujan Journal, 26, (3), pp. 295-310, 2011, DEC 2011.
181. Toric Methods in F-Theory Model Building,
Johanna Knapp, Maximilian Kreuzer,
Advances in High Energy Physics, 513436, 2011.
182. First Detection of Ar-K Line Emission from the Cygnus
Loop,
Hiroyuki Uchida, Hiroshi Tsunemi, Nozomu Tominaga,
Satoru Katsuda, Masashi Kimura, Hiroko Kosugi, Hiroaki
Takahashi, Satoru Takakura,
Publications of the Astronomical Society of Japan, 63, (1),pp. 199-208, 2011.

183. An integral formula for L-2-eigenfunctions of a fourthorder Bessel-type differential operator,
Toshiyuki Kobayashi, Jan Moellers,
Integral Transforms and Special Functions, 22, (7), pp.
521-531, 2011.
184. Linear Term Inflation from Running Kinetic Term inSupergravity,
Fuminobu Takahashi,
Progress of Theoretical Physics Supplement, (190), pp.
26-32, 2011.
185. Aspects of Hybrid Inflation in Supergravity,
Kazunori Nakayama, Fuminobu Takahashi, Tsutomu T
Yanagida,
Progress of Theoretical Physics Supplement, (190), pp.
42-49, 2011.
186. Cosmological Perturbations in General Modified Gravity
Theories,
Shinji Tsujikawa, Antonio De Felice, Shinji Mukohyama,
Progress of Theoretical Physics Supplement, (190), pp.
188-196, 2011.
187. Numerical Study of Q-Ball Formation in Gravity
Mediation,
Takashi Hiramatsu, Masahiro Kawasaki, Fuminobu
Takahashi,
Progress of Theoretical Physics Supplement, (190), pp.
229-238, 2011.
188. Time-Dependent Holography and Emergent Black Holeson D-Branes,
Tadashi Takayanagi,
Progress of Theoretical Physics Supplement, (190), pp.
304-315, 2011.
189. First On-Site Data Analysis System for Subaru/SuprimeCam,
Hisanori Furusawa, Yuki Okura, Sogo Mineo, Tadafumi
Takata, Fumiaki Nakata, Manobu Tanaka, Nobuhiko
Katayama, Ryosuke Itoh, Naoki Yasuda, Satoshi
Miyazaki, Yutaka Komiyama, Yousuke Utsumi, Tomohisa
Uchida, Hiroaki Aihara,
Publications of the Astronomical Society of Japan, 63, pp.
S585-S603, 2011.
190. Early Science Result from the Japanese Virtual
Observatory: AGN and Galaxy Clustering at
z=0.3 to 3.0,
Yuji Shirasaki, Masahiro Tanaka, Masatoshi Ohishi,
Yoshihiko Mizumoto, Naoki Yasuda, Tadafumi Takata,Publications of the Astronomical Society of Japan, 63, pp.
S469-S491, 2011.
191. Schrodinger-like Dilaton Gravity,
Yu Nakayama,
Symmetry Integrability and Geometry-Methods andApplications, 7, 014, 2011.
192. A SINGLE DEGENERATE PROGENITOR MODEL
FOR TYPE Ia SUPERNOVAE HIGHLY EXCEEDINGTHE CHANDRASEKHAR MASS LIMIT,
Izumi Hachisu, Mariko Kato, Hideyuki Saio, Ken’ichi
Nomoto,Astrophysical Journal, 744, (1), 69, 2012, JAN 1 2012.
193. Radon removal from gaseous xenon with activatedcharcoal,
K Abe, K Hieda, K Hiraide, S Hirano, Y Kishimoto, K
Kobayashi, Y Koshio, J Liu, K Martens, S Moriyama, M
Nakahata, H Nishiie, H Ogawa, H Sekiya, A Shinozaki, Y
Suzuki, O Takachio, A Takeda, K Ueshima, D Umemoto,
M Yamashita, K Hosokawa, A Murata, K Otsuka, Y
Takeuchi, F Kusaba, D Motoki, K Nishijima, S Tasaka,
K Fujii, I Murayama, S Nakamura, Y Fukuda, Y Itow, K
Masuda, Y Nishitani, H Takiya, H Uchida, Y. D Kim, Y.
H Kim, K. B Lee, M. K Lee, J. S Lee,

Nuclear Instruments & Methods in Physics Research
Section A-Accelerators Spectrometers Detectors andAssociated Equipment, 661, (1), pp. 50-57, 2012, JAN 1
2012.
194. Identifying the origin of longevity of meta-stable stau at
the LHC,
Takumi Ito, Kouhei Nakaji, Satoshi Shirai,
Physics Letters B, 706, (4-5), pp. 314-319, 2012, JAN 5
2012.
195. SPECTROSCOPIC CONFIRMATION OF THREEz-DROPOUT GALAXIES AT z=6.844-7.213:
DEMOGRAPHICS OF Ly alpha EMISSION IN z similar
to 7 GALAXIES,Yoshiaki Ono, Masami Ouchi, Bahram Mobasher, Mark
Dickinson, Kyle Penner, Kazuhiro Shimasaku, BenjaminJ Weiner, Jeyhan S Kartaltepe, Kimihiko Nakajima,
Hooshang Nayyeri, Daniel Stern, Nobunari Kashikawa,
Hyron Spinrad,
Astrophysical Journal, 744, (2), 83, 2012, JAN 10 2012.
196. NEW CONSTRAINTS ON THE EVOLUTION OF
THE STELLAR-TO-DARK MATTER CONNECTION:
A COMBINED ANALYSIS OF GALAXY-GALAXYLENSING, CLUSTERING, AND STELLAR MASSFUNCTIONS FROM z=0.2 to z=1,
Alexie Leauthaud, Jeremy Tinker, Kevin Bundy, Peter
S Behroozi, Richard Massey, Jason Rhodes, Matthew
R George, Jean-Paul Kneib, Andrew Benson, Risa H
Wechsler, Michael T Busha, Peter Capak, Marina Cortes,
Olivier Ilbert, Anton M Koekemoer, Oliver Le Fevre,
Simon Lilly, Henry J McCracken, Mara Salvato, Tim
Schrabback, Nick Scoville, Tristan Smith, James E Taylor,
Astrophysical Journal, 744, (2), 159, 2012, JAN 10 2012.
197. INTERNAL STRUCTURE OF PROTOCLUSTERGALAXIES: ACCELERATED STRUCTURALEVOLUTION IN OVERDENSE ENVIRONMENTS?,
Andrew W Zirm, Sune Toft, Masayuki Tanaka,
Astrophysical Journal, 744, (2), 181, 2012, JAN 10 2012.
198. A DETECTION OF WEAK-LENSINGMAGNIFICATION USING GALAXY SIZES ANDMAGNITUDES,
Fabian Schmidt, Alexie Leauthaud, Richard Massey,
Jason Rhodes, Matthew R George, Anton M Koekemoer,
Alexis Finoguenov, Masayuki Tanaka,
Astrophysical Journal Letters, 744, (2), L22, 2012, JAN
10 2012.
199. Parity violation in QCD process,Naoyuki Haba, Kunio Kaneta, Shigeki Matsumoto,Takehiro Nabeshima, Soshi Tsuno,
Physical Review D, 85, (1), 014007, 2012, JAN 10 2012.
200. Higgs mass and inflation,
Kazunori Nakayama, Fuminobu Takahashi,
Physics Letters B, 707, (1), pp. 142-145, 2012, JAN 16
2012.
201. AVERAGE METALLICITY AND STAR FORMATIONRATE OF Ly alpha EMITTERS PROBED BY A TRIPLE
NARROWBAND SURVEY,
Kimihiko Nakajima, Masami Ouchi, Kazuhiro
Shimasaku, Yoshiaki Ono, Janice C Lee, Sebastien
Foucaud, Chun Ly, Daniel A Dale, Samir Salim, RoseFinn, Omar Almaini, Sadanori Okamura,
Astrophysical Journal, 745, (1), 12, 2012, JAN 20 2012.

Publications

168. IMAGES OF THE EXTENDED OUTER REGIONS OF
THE DEBRIS RING AROUND HR 4796 A,
C Thalmann, M Janson, E Buenzli, T. D Brandt, J. P
Wisniewski, A Moro-Martin, T Usuda, G Schneider, J
Carson, M.WMcElwain, C. A Grady, M Goto, L Abe,W Brandner, C Dominik, S Egner, M Feldt, T Fukue, T
Golota, O Guyon, J Hashimoto, Y Hayano, M Hayashi,
S Hayashi, T Henning, K. W Hodapp, M Ishii, M Iye, R
Kandori, G. R Knapp, T Kudo, N Kusakabe, M Kuzuhara,
T Matsuo, S Miyama, J. -I Morino, T Nishimura, T. -S
Pyo, E Serabyn, H Suto, R Suzuki, Y. H Takahashi, M
Takami, N Takato, H Terada, D Tomono, E. L Turner, M
Watanabe, T Yamada, H Takami, M Tamura,
Astrophysical Journal Letters, 743, (1), L6, 2011, DEC 102011.

202. UNBURNED MATERIAL IN THE EJECTA OF TYPE
Ia SUPERNOVAE,
Gaston Folatelli, M. M Phillips, Nidia Morrell, Masaomi
Tanaka, Keiichi Maeda, Ken’ichi Nomoto, Maximilian
Stritzinger, Christopher R Burns, Mario Hamuy, Paolo
Mazzali, Luis Boldt, Abdo Campillay, Carlos Contreras,

IPMU Annual Report 201193

203. A gamma-ray signature of energetic sources of cosmicray nuclei,
Alexander Kusenko, M. B Voloshin,
Physics Letters B, 707, (2), pp. 255-258, 2012, JAN 20
2012.
204. Cross-correlating the thermal Sunyaev-Zel’dovich effectand the distribution of galaxy clusters,
Wenjuan Fang, Kenji Kadota, Masahiro Takada,Physical Review D, 85, (2), 023007, 2012, JAN 23 2012.
205. Grids of stellar models with rotation I. Models from 0.8 to
120 M-circle dot at solar metallicity (Z=0.014),
S Ekstroem, C Georgy, P Eggenberger, G Meynet, N
Mowlavi, A Wyttenbach, A Granada, T Decressin, R
Hirschi, U Frischknecht, C Charbonnel, A Maeder,
Astronomy & Astrophysics, 537, A146, 2012, JAN 2012.
206. Holographic Fermi surfaces and entanglement entropy,
Noriaki Ogawa, Tadashi Takayanagi, Tomonori Ugajin,
Journal of High Energy Physics, (1), 125, 2012, JAN 2012.
207. New lensed quasars from the MUSCLES survey,
Neal Jackson, Hayden Rampadarath, Eran O Ofek,
Masamune Oguri, Min-Su Shin,
Monthly Notices of the Royal Astronomical Society, 419,(3), pp. 2014-2024, 2012, JAN 2012.
208. String theory of the Omega deformation,
Simeon Hellerman, Domenico Orlando, Susanne Reffert,
Journal of High Energy Physics, (1), 148, 2012, JAN 2012.
209. Full-sky lensing reconstruction of gradient and curl modes
from CMB maps,
Toshiya Namikawa, Daisuke Yamauchi, Atsushi Taruya,
Journal of Cosmology and Astroparticle Physics, (1), 007,
2012, JAN 2012.
210. Boltzmann equation for non-equilibrium particles and its
application to non-thermal dark
matter production,
Koichi Hamaguchi, Takeo Moroi, Kyohei Mukaida,
Journal of High Energy Physics, (1), 083, 2012, JAN 2012.
211. The Type II supernovae 2006V and 2006au: two SN
1987A-like events,
F Taddia, M. D Stritzinger, J Sollerman, M. M Phillips,
J. P Anderson, M Ergon, G Folatelli, C Fransson, W
Freedman, M Hamuy, N Morrell, A Pastorello, S. E
Persson, S Gonzalez,
Astronomy & Astrophysics, 537, A140, 2012, JAN 2012.
212. Signals of the cosmological reionization in the radio sky
through C and O fine structure lines,
M Kusakabe, M Kawasaki,Monthly Notices of the Royal Astronomical Society, 419,(1), pp. 873-894, 2012, JAN 2012.
213. EARLY-TYPE GALAXIES AT z similar to 1.3.
IV. SCALING RELATIONS IN DIFFERENTENVIRONMENTS,
A Raichoor, S Mei, S. A Stanford, B. P Holden, F Nakata,
P Rosati, F Shankar, M Tanaka, H Ford, M HuertasCompany, G Illingworth, T Kodama, M Postman, A
Rettura, J. P Blakeslee, R Demarco, M. J Jee, R. L White,
Astrophysical Journal, 745, (2), 130, 2012, FEB 1 2012.
214. Investigating generalized parton distribution in gravity
dual,
Ryoichi Nishio, Taizan Watari,
Physics Letters B, 707, (3-4), pp. 362-368, 2012, FEB 1
2012.

94

IPMU Annual Report 2011

215. SEARCH FOR EXTRATERRESTRIAL
ANTINEUTRINO SOURCES WITH THE Kam-LAND
DETECTOR,
A Gando, Y Gando, K Ichimura, H Ikeda, K Inoue,
Y Kibe, Y Kishimoto, M Koga, Y Minekawa, T Mitsui, T
Morikawa, N Nagai, K Nakajima, K Nakamura, K Narita,
I Shimizu, Y Shimizu, J Shirai, F Suekane, A Suzuki,
H Takahashi, N Takahashi, Y Takemoto, K Tamae, H
Watanabe, B. D Xu, H Yabumoto, H Yoshida, S Yoshida,
S Enomoto, A Kozlov, H Murayama, C Grant, G Keefer,
A Piepke, T. I Banks, T Bloxham, J. A Detwiler, S. J
Freedman, B. K Fujikawa, K Han, R Kadel, T O’Donnell,
H. M Steiner, D. A Dwyer, R. D McKeown, C Zhang, B.
E Berger, C. E Lane, J Maricic, T Miletic, M Batygov,
J. G Learned, S Matsuno, M Sakai, G. A Horton-Smith,
K. E Downum, G Gratta, Y Efremenko, Y Kamyshkov,
O Perevozchikov, H. J Karwowski, D. M Markoff, W
Tornow, K. M Heeger, M. P Decowski,
Astrophysical Journal, 745, (2), 193, 2012, FEB 1 2012.
216. Phase transition and monopole production in supergravity
inflation,
Kohei Kamada, Kazunori Nakayama, Jun’ichi Yokoyama,
Physical Review D, 85, (4), 043503, 2012, FEB 3 2012.
217. THE INTEGRATED STELLAR CONTENT OF DARKMATTER HALOS,
Alexie Leauthaud, Matthew R George, Peter S Behroozi,
Kevin Bundy, Jeremy Tinker, Risa H Wechsler, Charlie
Conroy, Alexis Finoguenov, Masayuki Tanaka,
Astrophysical Journal, 746, (1), 95, 2012, FEB 10 2012.
218. Focus point assisted by right-handed neutrinos,
Masaki Asano, Takeo Moroi, Ryosuke Sato, Tsutomu T
Yanagida,
Physics Letters B, 708, (1-2), pp. 107-111, 2012, FEB 14
2012.
219. NMSSM in gauge-mediated SUSY breaking without
domain wall problem,
Koichi Hamaguchi, Kazunori Nakayama, Norimi
Yokozaki,Physics Letters B, 708, (1-2), pp. 100-106, 2012, FEB 14
2012.
220. The GeV-scale dark matter with B-L asymmetry,
Masahiro Ibe, Shigeki Matsumoto, Tsutomu T Yanagida,
Physics Letters B, 708, (1-2), pp. 112-118, 2012, FEB 14
2012.
221. Constraints on GUT 7-brane topology in F-theory,
Hirotaka Hayashi, Teruhiko Kawano, Taizan Watari,
Physics Letters B, 708, (1-2), pp. 191-194, 2012, FEB 14
2012.
222. Constraint on the primordial vector mode and its magnetic
field generation from seven-year Wilkinson Microwave
Anisotropy Probe observations,
Kiyotomo Ichiki, Keitaro Takahashi, Naoshi Sugiyama,
Physical Review D, 85, (4), 043009, 2012, FEB 14 2012.
223. CAN MINOR MERGING ACCOUNT FOR THE
SIZE GROWTH OF QUIESCENT GALAXIES? NEW
RESULTS FROM THE CANDELS SURVEY,
Andrew B Newman, Richard S Ellis, Kevin Bundy,
Tommaso Treu,
Astrophysical Journal, 746, (2), 162, 2012, FEB 20 2012.
224. ON epsilon-CONJECTURE IN a-THEOREM,
Yu Nakayama,
Modern Physics Letters A, 27, (5), 1250029, 2012, FEB
20 2012.
225. Cosmology with space-based gravitational-wave detectors:
Dark energy and primordial gravitational waves,
Atsushi Nishizawa, Kent Yagi, Atsushi Taruya, Takahiro
Tanaka,Physical Review D, 85, (4), 044047, 2012, FEB 22 2012.

226. First muon-neutrino disappearance study with an off-axisbeam,
K Abe, N Abgrall, Y Ajima, H Aihara, J. B Albert, C
Andreopoulos, B Andrieu, M. D Anerella, S Aoki, O
Araoka, J Argyriades, A Ariga, T Ariga, S Assylbekov,
D Autiero, A Badertscher, M Barbi, G. J Barker, G Barr,
M Bass, M Batkiewicz, F Bay, S Bentham, V Berardi, B.
E Berger, I Bertram, M Besnier, J Beucher, D Beznosko,
S Bhadra, F. D. M. M Blaszczyk, A Blondel, C Bojechko,
J Bouchez, S. B Boyd, A Bravar, C Bronner, D. G BrookRoberge, N Buchanan, H Budd, R. G Calland, D Calvet,
J Caravaca Rodriguez, S. L Cartwright, A Carver, R
Castillo, M. G Catanesi, A Cazes, A Cervera, C Chavez,
S Choi, G Christodoulou, J Coleman, G Collazuol,
W Coleman, K Connolly, A Curioni, A Dabrowska, I
Danko, R Das, G. S Davies, S Davis, M Day, G De Rosa,
J. P. A. M de Andre, P de Perio, T Dealtry, A Delbart,
C Densham, F Di Lodovico, S Di Luise, P. Dinh Tran,
J Dobson, U Dore, O Drapier, T Duboyski, F Dufour,
J Dumarchez, S Dytman, M Dziewiecki, M Dziomba,
S Emery, A Ereditato, J. E Escallier, L Escudero, L. S
Esposito, M Fechner, A Ferrero, A. J Finch, E Frank,
Y Fujii, Y Fukuda, V Galymov, G. L Ganetis, F. C
Gannaway, A Gaudin, A Gendotti, M. A George, S Giffin,
C Giganti, K Gilje, A. K Ghosh, T Golan, M Goldhaber, J.
J Gomez-Cadenas, S Gomi, M Gonin, N Grant, A Grant,
P Gumplinger, P Guzowski, D. R Hadley, A Haesler, M.
D Haigh, K Hamano, C Hansen, D Hansen, T Hara, P. F
Harrison, B Hartfiel, M Hartz, T Haruyama, T Hasegawa,N. C Hastings, A Hatzikoutelis, K Hayashi, Y Hayato, C
Hearty, R. L Helmer, R Henderson, N Higashi, J Hignight,
A Hillairet, T Hiraki, E Hirose, J Holeczek, S Horikawa,
K Huang, A Hyndman, A. K Ichikawa, K Ieki, M Ieva, M
Iida, M Ikeda, J Ilic, J Imber, T Ishida, C Ishihara, T Ishii,
S. J Ives, M Iwasaki, K Iyogi, A Izmaylov, B Jamieson,
R. A Johnson, K. K Joo, G. V Jover-Manas, C. K Jung,
H Kaji, T Kajita, H Kakuno, J Kameda, K Kaneyuki, D
Karlen, K Kasami, I Kato, H Kawamuko, E Kearns, M
Khabibullin, F Khanam, A Khotjantsev, D Kielczewska, T
Kikawa, J Kim, J. Y Kim, S. B Kim, N Kimura, B Kirby,
J Kisiel, P Kitching, T Kobayashi, G Kogan, S Koike, A
Konaka, L. L Kormos, A Korzenev, K Koseki, Y Koshio,
Y Kouzuma, K Kowalik, V Kravtsov, I Kreslo, W Kropp,
H Kubo, J Kubota, Y Kudenko, N Kulkarni, Y Kurimoto,
R Kurjata, T Kutter, J Lagoda, K Laihem, M Laveder,
M Lawe, K. P Lee, P. T Le, J. M Levy, C Licciardi, I.
T Lim, T Lindner, C Lister, R. P Litchfield, M Litos, A
Longhin, G. D Lopez, P. F Loverre, L Ludovici, T Lux,
M Macaire, L Magaletti, K Mahn, Y Makida, M Malek,
S Manly, A Marchionni, A. D Marino, A. J Marone, J
Marteau, J. F Martin, T Maruyama, T Maryon, J Marzec,
P Masliah, E. L Mathie, C Matsumura, K Matsuoka, V
Matveev, K Mavrokoridis, E Mazzucato, N Mc- Cauley,
K. S McFarland, C McGrew, T McLachlan, M Messina,
W Metcalf, C Metelko, M Mezzetto, P Mijakowski, C. A
Miller, A Minamino, O Mineev, S Mine, A. D Missert,
G Mituka, M Miura, K Mizouchi, L Monfregola, F
Moreau, B Morgan, S Moriyama, A Muir, A Murakami,
J. F Muratore, M Murdoch, S Murphy, J Myslik, N
Nagai, T Nakadaira, M Nakahata, T Nakai, K Nakajima,
T Nakamoto, K Nakamura, S Nakayama, T Nakaya, D
Naples, M. L Navin, T. C Nicholls, B Nielsen, C Nielsen,
K Nishikawa, H Nishino, K Nitta, T Nobuhara, J. A
Nowak, Y Obayashi, T Ogitsu, H Ohhata, T Okamura, K
Okumura, T Okusawa, S. M Oser, M Otani, R. A Owen,
Y Oyama, T Ozaki, M. Y Pac, V Palladino, V Paolone,
P Paul, D Payne, G. F Pearce, J. D Perkin, V Pettinacci,
F Pierre, E Poplawska, B Popov, M Posiadala, J. -M
Poutissou, R Poutissou, P Przewlocki, W Qian, J. L Raaf,
E Radicioni, P. N Ratoff, T. M Raufer, M Ravonel, M
Raymond, M Reeves, F Retiere, A Robert, P. A Rodrigues,
E Rondio, J. M Roney, B Rossi, S Roth, A Rubbia, D
Ruterbories, S Sabouri, R Sacco, K Sakashita, F Sanchez,
A Sarrat, K Sasaki, K Scholberg, J Schwehr, M Scott, D.
I Scully, Y Seiya, T Sekiguchi, H Sekiya, M Shibata, Y
Shimizu, M Shiozawa, S Short, P. D Sinclair, M Siyad, B.
M Smith, R. J Smith, M Smy, J. T Sobczyk, H Sobel,

M Sorel, A Stahl, P Stamoulis, J Steinmann, B Still, J
Stone, C Strabel, R Sulej, A Suzuki, K Suzuki, S Suzuki,
S. Y Suzuki, Y Suzuki, Y Suzuki, T Szeglowski, M
Szeptycka, R Tacik, M Tada, M Taguchi, S Takahashi, A
Takeda, Y Takenaga, Y Takeuchi, K Tanaka, H. A Tanaka,
M Tanaka, M. M Tanaka, N Tanimoto, K Tashiro, I
Taylor, A Terashima, D Terhorst, R Terri, L. F Thompson,
A Thorley, W Toki, S Tobayama, T Tomaru, Y Totsuka,
C Touramanis, T Tsukamoto, M Tzanov, Y Uchida, K
Ueno, A Vacheret, M Vagins, G Vasseur, O Veledar, T
Wachala, J. J Walding, A. V Waldron, C. W Walter, P. J
Wanderer, J Wang, M. A Ward, G. P Ward, D Wark, M. O
Wascko, A Weber, R Wendell, N West, L. H Whitehead,
G Wikstroem, R. J Wilkes, M. J Wilking, Z Williamson,
J. R Wilson, R. J Wilson, T Wongjirad, S Yamada, Y
Yamada, A Yamamoto, K Yamamoto, Y Yamanoi, H
Yamaoka, T Yamauchi, C Yanagisawa, T Yano, S Yen, N
Yershov, M Yokoyama, T Yuan, A Zalewska, J Zalipska,
L Zambelli, K Zaremba, M Ziembicki, E. D Zimmerman,
M Zito, J Zmuda,
Physical Review D, 85, (3), 031103, 2012, FEB 22 2012.
227. Deep 1.1 mm-wavelength imaging of the GOODS-S fieldby AzTEC/ASTE - II. Redshift distribution and nature of
the submillimetre galaxy population,
Min S Yun, K. S Scott, Yicheng Guo, I Aretxaga, M
Giavalisco, J. E Austermann, P Capak, Yuxi Chen, H
Ezawa, B Hatsukade, D. H Hughes, D Iono, S Johnson, R
Kawabe, K Kohno, J Lowenthal, N Miller, G Morrison, T
Oshima, T. A Perera, M Salvato, J Silverman, Y Tamura,
C. C Williams, G. W Wilson,
Monthly Notices of the Royal Astronomical Society, 420,(2), pp. 957-985, 2012, FEB 2012.
228. Isocurvature perturbations in extra radiation,
Masahiro Kawasaki, Koichi Miyamoto, Kazunori
Nakayama, Toyokazu Sekiguchi, Journal of Cosmology
and Astroparticle
Physics, (2), 022, 2012, FEB 2012.
229. Using galaxy-galaxy weak lensing measurements tocorrect the finger of God,
Chiaki Hikage, Masahiro Takada, David N Spergel,
Monthly Notices of the Royal Astronomical Society, 419,(4), pp. 3457-3481, 2012, FEB 2012.
230. Halo abundances and counts-in-cells: the excursion set
approach with correlated steps,
Aseem Paranjape, Tsz Yan Lam, Ravi K Sheth,
Monthly Notices of the Royal Astronomical Society, 420,(2), pp. 1429-1441, 2012, FEB 2012.
231. Ionized bubble number count as a probe of nonGaussianity,
Hiroyuki Tashiro, Naoshi Sugiyama,Monthly Notices of the Royal Astronomical Society, 420,(1), pp. 441-446, 2012, FEB 2012.
232. Non-standard s-process in low metallicity massive
rotating stars,
U Frischknecht, R Hirschi, F. -K Thielemann,
Astronomy & Astrophysics, 538, L2, 2012, FEB 2012.
233. The galaxy stellar mass function of X-ray detected groups
Environmental dependence of galaxy evolution in the
COSMOS survey,
S Giodini, A Finoguenov, D Pierini, G Zamorani, O
Ilbert, S Lilly, Y Peng, N Scoville, M Tanaka,
Astronomy & Astrophysics, 538, A104, 2012, FEB 2012.

Publications

Sergio Gonzalez, Miguel Roth, Francisco Salgado, W.
L Freedman, Barry F Madore, S. E Persson, Nicholas B
Suntzeff,
Astrophysical Journal, 745, (1), 74, 2012, JAN 20 2012.

234. The Standardizability of Type Ia Supernovae in the NearInfrared: Evidence for a Peak-Luminosity Versus DeclineRate Relation in the Near-Infrared,
ShiAnne Kattner, Douglas C Leonard, Christopher R
Burns, M. M Phillips, Gaston Folatelli, Nidia Morrell,

IPMU Annual Report 201195

244. General relativity limit of Horava-Lifshitz gravity with ascalar field in gradient expansion,
A. Emir Guemruekcueoglu, Shinji Mukohyama, Anzhong
Wang,
Physical Review D, 85, (6), 064042, 2012, MAR 28 2012.

235. A hierarchy of voids: more ado about nothing,
Aseem Paranjape, Tsz Yan Lam, Ravi K Sheth,
Monthly Notices of the Royal Astronomical Society, 420,(2), pp. 1648-1655, 2012, FEB 2012.

245. Impact of massive neutrinos on the abundance of massive
clusters,
Kiyotomo Ichiki, Masahiro Takada,Physical Review D, 85, (6), 063521, 2012, MAR 30 2012.

236. DIVERSITY OF LUMINOUS SUPERNOVAE FROMNON-STEADY MASS LOSS,
Takashi J Moriya, Nozomu Tominaga,
Astrophysical Journal, 747, (2), 118, 2012, MAR 10 2012.

246. Combined strong and weak lensing analysis of 28 clusters
from the Sloan Giant Arcs Survey,
Masamune Oguri, Matthew B Bayliss, Hakon Dahle,
Keren Sharon, Michael D Gladders, Priyamvada
Natarajan, Joseph F Hennawi, Benjamin P Koester,Monthly Notices of the Royal Astronomical Society, 420,(4), pp. 3213-3239, 2012, MAR 2012.

237. SIMULATIONS OF EARLY BARYONIC STRUCTURE
FORMATION WITH STREAM VELOCITY. I. HALOABUNDANCE,
Smadar Naoz, Naoki Yoshida, Nickolay Y Gnedin,
Astrophysical Journal, 747, (2), 128, 2012, MAR 10 2012.
238. Comments on worldsheet description of the Omega
background,
Yu Nakayama, Hirosi Ooguri,
Nuclear Physics B, 856, (2), pp. 342-359, 2012, MAR 112012.
239. Extra matters decree the relatively heavy Higgs of mass
about 125 GeV in the supersymmetric model,
Takeo Moroi, Ryosuke Sato, Tsutomu T Yanagida,
Physics Letters B, 709, (3), pp. 218-221, 2012, MAR 192012.
240. A note on Kahler potential of charged matter in F-theory,
Teruhiko Kawano, Yoichi Tsuchiya, Taizan Watari,
Physics Letters B, 709, (3), pp. 254-259, 2012, MAR 192012.
241. DARK ENERGY FROM THE LOGTRANSFORMEDCONVERGENCE FIELD,
Hee-Jong Seo, Masanori Sato, Masahiro Takada, Scott
Dodelson,Astrophysical Journal, 748, (1), 57, 2012, MAR 20 2012.
242. Supernova relic neutrino search at super-Kamiokande,
K Bays, T Iida, K Abe, Y Hayato, K Iyogi, J Kameda, YKoshio, L Marti, M Miura, S Moriyama, M Nakahata,
S Nakayama, Y Obayashi, H Sekiya, M Shiozawa, Y
Suzuki, A Takeda, Y Takenaga, K Ueno, K Ueshima, S
Yamada, T Yokozawa, H Kaji, T Kajita, K Kaneyuki, T
McLachlan, K Okumura, K. P Lee, K Martens, M Vagins,
L Labarga, E Kearns, M Litos, J. L Raaf, J. L Stone, L. R
Sulak, W. R Kropp, S Mine, C Regis, A Renshaw, M. B
Smy, H. W Sobel, K. S Ganezer, J Hill, W. E Keig, S Cho,
J. S Jang, J. Y Kim, I. T Lim, J Albert, K Scholberg, C. W
Walter, R Wendell, T Wongjirad, T Ishizuka, S Tasaka,
J. G Learned, S Matsuno, S Smith, T Hasegawa, T
Ishida, T Ishii, T Kobayashi, T Nakadaira, K Nakamura,
K Nishikawa, Y Oyama, K Sakashita, T Sekiguchi,
T Tsukamoto, A. T Suzuki, Y Takeuchi, M Ikeda, K
Matsuoka, A Minamino, A Murakami, T Nakaya, Y
Fukuda, Y Itow, G Mitsuka, M Miyake, T Tanaka, J
Hignight, J Imber, C. K Jung, I Taylor, C Yanagisawa,
A Kibayashi, H Ishino, S Mino, M Sakuda, T Mori, H
Toyota, Y Kuno, S. B Kim, B. S Yang, H Okazawa, Y
Choi, K Nishijima, M Koshiba, Y Totsuka, M Yokoyama,
Y Heng, S Chen, H Zhang, Z Yang, P Mijakowski, K
Connolly, M Dziomba, R. J Wilkes,
Physical Review D, 85, (5), 052007, 2012, MAR 22 2012.

247. Cosmological perturbations of self-accelerating universe
in nonlinear massive gravity,
A. Emir Guemruekcueoglu, Chunshan Lin, Shinji
Mukohyama,
Journal of Cosmology and Astroparticle Physics, (3), 006,
2012, MAR 2012.
248. PTF10iya: a short-lived, luminous flare from the nuclear
region of a star-forming galaxy,
S. Bradley Cenko, Joshua S Bloom, S. R Kulkarni, Linda
E Strubbe, Adam A Miller, Nathaniel R Butler, Robert M
Quimby, Avishay Gal-Yam, Eran O Ofek, Eliot Quataert,
Lars Bildsten, Dovi Poznanski, Daniel A Perley, Adam
N Morgan, Alexei V Filippenko, Dale A Frail, Iair
Arcavi, Sagi Ben-Ami, Antonio Cucchiara, Christopher
D Fassnacht, Yoav Green, Isobel M Hook, D. Andrew
Howell, David J Lagattuta, Nicholas M Law, Mansi M
Kasliwal, Peter E Nugent, Jeffrey M Silverman, Mark
Sullivan, Shriharsh P Tendulkar, Ofer Yaron,
Monthly Notices of the Royal Astronomical Society, 420,(3), pp. 2684-2699, 2012, MAR 2012.
249. Dark radiation from modulated reheating,Takeshi Kobayashi, Fuminobu Takahashi, Tomo
Takahashi, Masahide Yamaguchi,
Journal of Cosmology and Astroparticle Physics, (3), 036,
2012, MAR 2012.
250. The effect of C-12+C-12 rate uncertainties on theevolution and nucleosynthesis of massive stars,
M. E Bennett, R Hirschi, M Pignatari, S Diehl, C Fryer,
F Herwig, A Hungerford, K Nomoto, G Rockefeller, F. X
Timmes, M Wiescher,Monthly Notices of the Royal Astronomical Society, 420,(4), pp. 3047-3070, 2012, MAR 2012.
251. Dust in historical Galactic Type Ia supernova remnantswith Herschel,
H. L Gomez, C. J. R Clark, T Nozawa, O Krause, E. L
Gomez, M Matsuura, M. J Barlow, M. -A Besel, L Dunne,
W. K Gear, P Hargrave, Th Henning, R. J Ivison, B
Sibthorpe, B. M Swinyard, R Wesson,
Monthly Notices of the Royal Astronomical Society, 420,(4), pp. 3557-3573, 2012, MAR 2012.

Publications

Maximilian D Stritzinger, Mario Hamuy, Wendy L
Freedman, Sven E Persson, Miguel Roth, Nicholas B
Suntzeff,
Publications of the Astronomical Society of the Pacific,
124, (912), pp. 114-127, 2012, FEB 2012.

252. Stability conditions and curve counting invariants on
Calabi-Yau 3-folds,
Yukinobu Toda,
Kyoto Journal of Mathematics, 52, (1), pp. 1-50, 2012,
SPR 2012.

243. Large mixing angles from many right-handed neutrinos,
Brian Feldstein, William Klemm,
Physical Review D, 85, (5), 053007, 2012, MAR 27 2012.

96

IPMU Annual Report 2011

IPMU Annual Report 2011

97

IPMU11-0072
Kyoji Saito
Opposite Series
EJC
IPMU11-0073
Daniel Gruen, Gary M. Bernstein, Tsz Yan Lam, Stella Seitz
Optimizing weak lensing mass estimates for cluster profile
uncertainty
MNRAS 416, 1392 (2011)

JFY2011
IPMU11-0054
Io Kawaguchi, Domenico Orlando and Kentaroh Yoshida
Yangian symmetry in deformed WZNW models onsquashed spheres
Phys. Lett. B, 475 (2011)
IPMU11-0055
Cosimo Bambi
Compact objects with spin parameter a* > 1
IPMU11-0056
Emir Gumrukcuoglu, Shinji Mukohyama
Horava-Lifshitz gravity with λ→ ∞Phys. Rev. D 83, 124033 (2011)
IPMU11-0057
Masahiro Kawasaki, Naoya Kitajima, Kazunori
Nakayama
Cosmological Aspects of Inflation in a
Supersymmetric Axion Model
Phys. Rev. D 83, 123521 (2011)
IPMU11-0058
Cosimo Bambi, Leonardo Modesto
Can an astrophysical black hole have a topologically
non-trivial event horizon?
Phys. Lett. B, arXiv:1107.4337 [gr-qc]
IPMU11-0059
Ryosuke Sato, Satoshi Shirai, Kazuya Yonekura
A Possible Interpretation of CDF Dijet Mass
Anomaly and its Realization in the Framework ofSupersymmetry
IPMU11-0060
Hui Luo, Mingxing Luo, Kai Wang, Guohuai Zhu
Searching Supersymmetry in top quark pairs
IPMU11-0061
Keisuke Izumi, Shinji Mukohyama
Nonlinear superhorizon perturbations in HoravaLifshitz gravity
IPMU11-0062
Shigeki Matsumoto, Takeo Moroi
Studying very light gravitino at the ILC
IPMU11-0063
de la Torre, S.; Le F’{evre, O.; Porciani, C.; Guzzo,
L.; Meneux, B.; Abbas, U.; Tasca, L.; Carollo, C.
M.; Contini, T.; Kneib, J.-P.; Lilly, S. J.; Mainieri, V.;
Renzini, A.; Scodeggio, M.; Zamorani, G.; Bardelli,S.; Bolzonella, M.; Bongiorno, A.; Caputi, K.; Coppa,
G.; Cucciati, O.; de Ravel, L.; Franzetti, P.; Garilli,B.; Halliday, C.; Iovino, A.; Kampczyk, P.; Knobel,
C.; Koekemoer, A. M.; Kovu{ac, K.; Lamareille, F.;
Le Borgne, J.-F.; Le Brun, V.; Maier, C.; Mignoli, M.;
Pell’{o, R.; Peng, Y.; Perez-Montero, E.; Ricciardelli,
E.; Silverman, J.; Tanaka, M.; Tresse, L.; Vergani, D.;
Zucca, E.; Bottini, D.; Cappi, A.; Cassata, P.; Cimatti, A.;
Leauthaud, A.; Maccagni, D.; Marinoni, C.; McCracken,
H. J.; Memeo, P.; Oesch, P.; Pozzetti, L.; Scaramella, R.
The zCOSMOS-Bright survey: the clustering of earlyand late galaxy morphological types since z ~ 1
A&A 412, 825, 201198

IPMU Annual Report 2011

IPMU11-0064
Civano, F.; Brusa, M.; Comastri, A.; Elvis, M.; Salvato,
M.; Zamorani, G.; Capak, P.; Fiore, F.; Gilli, R.; Hao,
H.; Ikeda, H.; Kakazu, Y.; Kartaltepe, J. S.; Masters,
D.; Miyaji, T.; Mignoli, M.; Puccetti, S.; Shankar, F.;
Silverman, J.; Vignali, C.; Zezas, A.
The Population of High Redshift AGNs in the
Chandra COSMOS survey
Astrophys. J. 741, 91 (2011)
IPMU11-0065
Ikeda, H.; Nagao, T.; Matsuoka, K.; Taniguchi, Y.;
Shioya, Y.; Trump, J. R.; Capak, P.; Comastri, A.;
Enoki, M.; Ideue, Y.; Kakazu, Y.; Koekemoer, A. M.;
Morokuma, T.; Murayama, T.; Saito, T.; Salvato, M.;
Schinnerer, E.; Scoville, N. Z.; Silverman, J. D.
Probing the Faint End of the Quasar Luminosity
Function at z~ 4 in the COSMOS Field
Astrophys. J. 728, L25, 2011
IPMU11-0066
J.D. Silverman, P. Kampczyk, S. Lilly, M. Elvis, F.
Civano, V. Mainieri, C. Vignali, G. Zamorani, P. Nair,
O. Le Fevre, L. de Ravel, K. Jahnke, S. Bardelli, A.
Bongiorno, M. Bolzonella, M. Brusa, N. Cappelluti, A.
Cappi, K. Caputi, C. M. Carollo, T. Contini, G. Coppa,
O. Cucciati, S. de la Torre, P. Franzetti, B. Garilli, G.
Hasinger, A. Iovino, C. Knobel, K. Kovac, F. Lamareille,
J. -F. Le Borgne, V. Le Brun, C. Maier, M. Mignoli, R.
Pello, E. Perez Montero, E. Ricciardelli, Y. Peng, M.
Scodeggio, M. Tanaka, L. Tasca, L. Tresse, D. Vergani,
E. Zucca, A. Comastri, A. Finoguenov, H. Fu, R. Gilli, H.
Hao, L. Ho, A. M. Koekemoer, M. Salvato
Direct evidence for enhanced AGN activity inzCOSMOS galaxy pairs
Astrophys. J. Lett.
IPMU11-0067
Jason Evans, Brian Feldstein, William Klemm, Hitoshi
Murayama and Tsutomu Yanagida
Hermitian Flavor Violation
IPMU11-0068
Tomoyuki ABE, Adriano MARMORA
Product formula for p-adic epsilon factors
arXiv:1104.1563 [math]
IPMU11-0069
Tomoyuki ABERings of microdifferential operators for arithmeticcal -modules
arXiv:1104.1574 [math]
IPMU11-0070
Yamasawa, D., Habe, A., Kozasa, T., Nozawa, T.,
Hirashita, H., Umeda, H., Nomoto, K.
The Role of Dust in the Early Universe I : Protogalaxy
Evolution
Astrophys. J. 735, 44 (2011)
IPMU11-0071
Mitsutoshi Fujita, Yasuyuki Hatsuda and Tadashi
Takayanagi
Probing AdS Wormholes by Entanglement Entropy
arXiv:1104.4907 [hep-th]

IPMU11-0074
Satoshi Shirai, Ryosuke Sato and Tsutomu T. Yanagida
A Scalar Boson as a Messenger of New Physics
IPMU11-0075
Chiaki Hikage, Masahiro Takada, David N. Spergel
Using galaxy-galaxy weak lensing measurements to correct
the Finger-of-God
MNRAS 419, 3457 (2012)
IPMU11-0076
Tao Liu, Hiren H. Patel, Michael J. Ramsey-Musolf and Jing
Shu
Electroweak Bottomgenesis: from CP-violation in b → s
Transitions to Baryon Asymmetry in the Universe
Phys. Rev. Lett.
IPMU11-0077
Kentaro Hori
Notes on bosonization with boundary
IPMU11-0078
Dongfeng Gao and Kentaro Hori
On the structure of the Chan-Paton factors for D-branes
in Type II orientifolds
IPMU11-0079
Kentaro Hori
Duality in two-dimensional (2,2) supersymmetric nonAbelian gauge theories
IPMU11-0080
Ryouichi Nishio and Taizan Watari
Investigating Generalized Parton Distribution in Gravity
DualPhys. Lett., arXiv:1105.2907 [hep-ph]
IPMU11-0081
Takaya Nozawa, Keiichi Maeda, Takashi Kozasa, Masaomi
Tanaka, Ken’ichi Nomoto, Hideyuki Umeda
Formation of Dust in the Ejecta of Type Ia Supernovae
Astrophys. J. 736, 45 (2011)
IPMU11-0082
Allevato, V., Finoguenov, A., Cappelluti, N., Silverman, J.D. et al.
The XMM-Newton Wide field survey in the COSMOS
field: redshift evolution of AGN bias and subdominantrole of mergers in triggering moderate luminosity AGN at
redshift up to 2.2
Astrophys. J., arXiv:1105.0520 [astro-ph]
IPMU11-0083
de Ravel, L., Kampczyk, P. Le Fevre, O., Lilly, S., Silverman, J.
et al.
The zCOSMOS redshift survey : Influence of luminosity,
mass and environment on the galaxy merger rate
A&A, arXiv:1104.5470 [astro-ph]
IPMU11-0084
R. S. de Souza, N. Yoshida and K. Ioka
Population III.1 and III.2 Gamma-Ray Bursts:
Constraints on the Event Rate for Future Radio and X-ray
SurveysA&A 533, 32, 2011

IPMU11-0085
Adi Zitrin, Tom Broadhurst, Matthias Bartelmann, Yoel
Rephaeli, Masamune Oguri, Narciso Benitez, Jiangang Hao,and Keiichi Umetsu
The Universal Einstein Radius Distribution from 10,000
SDSS Clusters
MNRAS, arXiv:1105.2295 [astro-ph]
IPMU11-0086
Yuji Tachikawa, Kazuya Yonekura
N=1 curves for trifundamentals
IPMU11-0087
Aseem Paranjape, Tsz Yan Lam, Ravi K. ShethHalo abundances and counts-in-cells: The excursion set
approach with correlated steps
MNRAS, arXiv:1105.1990 [astro-ph]
IPMU11-0088
Motoi Endo, Koichi hamaguchi, Kouhei Nakaji
LHC Signatures with Long Lived Stau in High Reheating
Temperature Scenario
IPMU11-0089
Masahiro Kawasaki, Koichi Miyamoto, Kazunori Nakayama
Cosmological effects of decaying cosmic string loops with
TeV scale width
JCAP
IPMU11-0090
A. Gando, Y. Gando, K. Ichimura, H. Ikeda, K. Inoue, Y. Kibe,
Y. Kishimoto, M. Koga, Y. Minekawa, T. Mitsui, T. Morikawa,N. Nagai, K. Nakajima, K. Nakamura, K. Narita, I. Shimizu,
Y. Shimizu, J. Shirai, F. Suekane, A. Suzuki, H. Takahashi, N.
Takahashi, Y. Takemoto, K. Tamae, H. Watanabe, B. D. Xu,
H. Yabumoto, H. Yoshida, S. Yoshida, S. Enomoto, A. Kozlov,
H. Murayama., C. Grant, G. Keefer, A. Piepke, T. I. Banks, T.
Bloxham, J. A. Detwiler, S. J. Freedman, B. K. Fujikawa, K.
Han, R. Kadel, T. O’Donnell, H. M. Steiner, D. A. Dwyer, R.
D. McKeown, C. Zhang, B. E. Berger, C. E. Lane, J. Maricic,
T. Miletic, M. Batygov, J. G. Learned, S. Matsuno, M. Sakai,
G. A. Horton-Smith, K. E. Downum, G. Gratta, Y. Efremenko,
Y. Kamyshkov, O. Perevozchikov, H. J. Karwowski, D. M.
Markoff, W. Tornow, K. M. Heeger, M. P. Decowski
A study of extraterrestrial antineutrino sources with the
KamLAND detector
Astrophys. J. 745, 193 (2012)
IPMU11-0091
Tadashi Takayanagi
Holographic Dual of BCFT
Phys. Rev. Lett. 107, 101602 (2011)
IPMU11-0092
Mainieri, V. (ESO), Bongiorno, A. (MPE), Merloni, A. (MPE),
Silverman, J (IPMU), Tanaka, M. (IPMU) et al.
Black hole accretion and host galaxies of obscured quasars
in XMM-COSMOS
A&A, arXiv:1105.5395 [astro-ph]
IPMU11-0093
Kentaro Hanaki, Masahiro Ibe, Yutaka Ookouchi and ChangSoon Park
Constraints on Direct Gauge Mediation Models with
Complex Representations
IPMU11-0094
Yu Nakayama and Hirosi Ooguri
Comments on Worldsheet Description of the Omega
Backgroun

IPMU Annual Report 2011

Preprints

13 Preprints

99

IPMU11-0096
Simeon Hellerman, Domenico Orlando, Susanne Reffert
String theory of the Omega deformation
IPMU11-0097
Kimihiko Nakajima, Masami Ouchi, Kazuhiro Shimasaku,
Yoshiaki Ono, Janice Lee, Sebastien Foucaud, Chun Ly,
Daniel Dale, Samir Salim, Rose Finn, Omar Almaini, andSadanori Okamura
Average Metallicity and Star Formation Rate of Lya
Emitters Probed by a Triple Narrow-Band Survey
Astrophys. J., arXiv:1105.2824 [astro-ph]
IPMU11-0098
Sergey Galkin
Five lectures on Fano Mirrors
IPMU11-0099
Sergey Galkin
Two instances of fake minimal Fano threefolds II
IPMU11-0100
Sergey Galkin and Anton Mellit
Homologically minimal fourfolds
IPMU11-0101
Alexey Bondal and Sergey Galkin
Mirror symmetry for minuscule varieties
IPMU11-0102
Emille E. O. Ishida, Rafael S. de Souza, Andrea Ferrara
Probing cosmic star formation up to z = 9.4 with GRBs
MNRAS 418, 500 (2011)
IPMU11-0103
S. Abe, K. Furuno, A. Gando, Y. Gando, K. Ichimura, H.
Ikeda, K. Inoue, Y. Kibe, W. Kimura, Y. Kishimoto, M.
Koga, Y. Minekawa, T. Mitsui, T. Morikawa, N. Nagai, K.
Nakajima, K. Nakamura, M. Nakamura, K. Narita, I. Shimizu,
Y. Shimizu, J. Shirai, F. Suekane, A. Suzuki, H. Takahashi,
N. Takahashi, Y. Takemoto, K. Tamae, H. Watanabe, B.D.
Xu, H. Yabumoto, E. Yonezawa, H. Yoshida, S. Yoshida, S.
Enomoto, A. Kozlov, H. Murayama, C. Grant, G. Keefer, D.
McKee, A. Piepke, T.I. Banks, T. Bloxham, J.A. Detwiler, S.J.
Freedman, B.K. Fujikawa, K. Han, R. Kadel, T. O’Donnell,
H.M. Steiner, L.A. Winslow, D.A. Dwyer, C. Mauger, R.D.
McKeown, C. Zhang, B.E. Berger, C.E. Lane, J. Maricic, T.
Miletic, M. Batygov, J.G. Learned, S. Matsuno, S. Pakvasa, M.
Sakai, G.A. Horton-Smith, A. Tang, K.E. Downum, G. Gratta,
K. Tolich, Y. Efremenko, Y. Kamyshkov, O. Perevozchikov,
H.J. Karwowski, D.M. Markoff, W. Tornow, K.M. Heeger, F.
Piquemal, J.-S. Ricol, M.P. Decowski
Measurement of the 8B Solar Neutrino Flux with
KamLAND
Phys. Rev. C 84, 035804 (2011),
IPMU11-0104
Hitoshi Murayama, Mihoko Nojiri, and Kohsaku Tobioka
Improved discovery of nearly degenerate model: MUED
using MT2 at the LHC
Phys. Rev. D
IPMU11-0105
Todor Milanov and Yongbin Ruan
Gromov-Witten theory of elliptic orbifold P1 and quasimodular forms
arXiv:1106.2321 [math]

100

IPMU Annual Report 2011

IPMU11-0106
Antonella Grassi and David R. Morrison
Anomalies and the Euler characteristic of elliptic CalabiYau threefolds
arXiv:1109.0042 [hep-th]
IPMU11-0107
Sheldon Katz and David R. Morrison and James Sully and
Sakura Schäfer-Nemeki
Tate’s algorithm and F-theory
JHEP 08, 094 (2011)
IPMU11-0108
David R. Morrison and Washington Taylor
Matter and singularities
arXiv:1106.3563 [hep-th]
IPMU11-0109
Ryuichi Takahashi, Masamune Oguri, Masanori Sato, Takashi
HamanaProbability Distribution Functions of Cosmological
Lensing: Convergence, Shear, and Magnification
Astrophys. J. 742, 15 (2011)
IPMU11-0110
Wong Sang Cho, Keisuke Harigaya, Shigeki Matsumoto,
Mihoko Nojiri and Kohsaku Tobioka
Testing Little Higgs Mechanism at Future Colliders
IPMU11-0111
Aseem Paranjape, Tsz Yan Lam, Ravi K. ShethA hierarchy of voids: More ado about nothing
MNRAS, arXiv:1106.2041 [astro-ph]
IPMU11-0112
Richard Eager, Sebastian Franco, Kevin Schaeffer
Dimer Models and Integrable Systems
arXiv:1107.1244 [hep-th]
IPMU11-0113
Cristian E. Rusu, Masamune Oguri, Naohisa Inada, Issha
Kayo, Masanori Iye, Yutaka Hayano, Shin Oya, Masayuki
Hattori, Yoshihiko Saito, Meguru Ito, Yosuke Minowa, TaeSoo Pyo, Hiroshi Terada, Hideki Takami, Makoto Watanabe
SDSS J133401.39+331534.3: A New Subarcsecond
Gravitationally Lensed Quasar
Astrophys. J. 738, 30 (2011)
IPMU11-0114
M. Matsuura, E. Dwek, M. Meixner, M. Otsuka, B. Babler, M.
J. Barlow, J. Roman-Duval, C. Engelbracht, K. Sandstrom, M.
Lakicevic, J. Th. van Loon, G. Sonneborn, G. C. Clayton, K.
S. Long, P. Lundqvist, T. Nozawa, K. D. Gordon, S. Hony, K.
Okumura, K. A. Misselt, E. Montiel, M. Sauvage
Herschel Detects a Massive Dust Reservoir in Supernova
1987A
Science 333, 1258 (2011)
IPMU11-0115
Takahiro Nishimichi, Atsushi Taruya
Baryon Acoustic Oscillations in 2D II: Redshift-space haloclustering in N-body simulations
Phys. Rev. D 84, 043526 (2011)
IPMU11-0116
Jason L. Evans, Masahiro Ibe and Tsutomu T. Yanagida
Relatively Heavy Higgs Boson in More Generic Gauge
Mediation
IPMU11-0117
Alexey Bondal, Alexei Rosly
Derived categories for complex-analytic manifolds
IPMU11-0118
A. Gando, Y. Gando, K. Ichimura, H. Ikeda, K. Inoue, Y. Kibe,
Y. Kishimoto, M. Koga, Y. Minekawa, T. Mitsui, T. Morikawa,N. Nagai, K. Nakajima, K. Nakamura, K. Narita, I. Shimizu,

Y. Shimizu, J. Shirai, F. Suekane, A. Suzuki, H. Takahashi, N.
Takahashi, Y. Takemoto, K. Tamae, H. Watanabe, B. D. Xu,
H. Yabumoto, H. Yoshida, S. Yoshida, S. Enomoto, A. Kozlov,
H. Murayama, C. Grant, G. Keefer, A. Piepke, T. I. Banks, T.
Bloxham, J. A. Detwiler, S. J. Freedman, B. K. Fujikawa, K.
Han, R. Kadel, T. ODonnell, H. M. Steiner, D. A. Dwyer, R.
D. McKeown, C. Zhang, B. E. Berger, C. E. Lane, J. Maricic,
T. Miletic, M. Batygov, J. G. Learned, S. Matsuno, M. Sakai,
G. A. Horton-Smith, K. E. Downum, G. Gratta, K. Tolich,Y. Efremenko, O. Perevozchikov, H. J. Karwowski, D. M.
Markoff, W. Tornow, K. M. Heeger, M. P. Decowski
Partial radiogenic heat model for Earth revealed bygeoneutrino measurements
Nature Geoscience 4, 647 (2011)
IPMU11-0119
Noriaki Ogawa and Tadashi Takayanagi
Higher Derivative Corrections to Holographic
Entanglement Entropy for AdS Solitons
JHEP 1110, 147(2011)
IPMU11-0120
Tomonori Ugajin
Microstate Counting of a Higher Spin Black HoleIPMU11-0121
Keisuke Harigaya, Ryosuke Sato, Satoshi Shirai
Testing CDF Wjj Anomaly at the LHC
IPMU11-0122
Takeshi Kobayashi, Masahiro Kawasaki, Fuminobu Takahashi
Non-Gaussianity from Curvatons Revisited
IPMU11-0123
Kiyotomo Ichiki, Masahiro Takada
The impact of massive neutrino on the abundance ofmassive clusters
Phys. Rev. D, arXiv:1108.4688 [astro-ph]
IPMU11-0124
Masahiro Kawasaki, Koichi Miyamoto, Kazunori Nakayama,
Toyokazu Sekiguchi
Isocurvature perturbations in extra radiation
JCAP
IPMU11-0125
Shinta Kasuya, Masahiro Kawasaki
Gravitino dark matter and baryon asymmetry from Q-balldecay in gauge mediation
Phys. Rev. D, arXiv:1107.0403 [hep-ph]
IPMU11-0126
D. Marrone, G. P. Smith, N. Okabe et al. (including M.
Takada)LoCuSS: The Sunyaev-Zel’dovich Effect and Weak
Lensing Mass Scaling Relation
Astrophys. J., arXiv:1107.5115 [astro-ph]
IPMU11-0127
Kazunori Nakayama, Fuminobu Takahashi
Low-scale Supersymmetry from Inflation
JCAP10(2011)033
IPMU11-0128
Susanne Reffert
General Omega Deformations from Closed String
Backgrounds
IPMU11-0129
Masaki Asano, Takeo Moroi, Ryosuke Sato, Tsutomu T.
Yanagida
Extra family, R-symmetry and Higgs-mass
IPMU11-0130
Yuji Tachikawa and Seiji Terashima
Seiberg-Witten geometries revisited

IPMU11-0131
Jason L. Evans, Masahiro Ibe, and Tsutomu T. Yanagida
Probing Extra Matter in Gauge Mediation Through theLightest Higgs Boson Mass
IPMU11-0132
Cosimo Bambi, Enrico Barausse
The final stages of accretion onto non-Kerr compact
objects
Phys. Rev. D 84, 084034(2011)
IPMU11-0133
Motoi Endo, Koichi Hamaguchi, Sho Iwamoto, Norimi
Yokozaki
Higgs Mass and Muon Anomalous Magnetic Moment inSupersymmetric Models with Vector-Like Matters
arXiv:1108.3071 [hep-ph]
IPMU11-0134
Kazunori Nakayama, Fuminobu Takahashi
Higgs mass and Inflation
IPMU11-0135
Koichi Hamaguchi, Kazunori Nakayama, Norimi Yokozaki
NMSSM in gauge-mediated SUSY breaking without
domain wall problem
Phys. Lett. B, arXiv:1107.4760 [hep-ph]
IPMU11-0136
Mitsutoshi Fujita, Tadashi Takayanagi, Erik Tonni
Aspects of AdS/BCFT
IPMU11-0137
Kazunori Nakayama, Norimi Yokozaki, Kazuya Yonekura
Relaxing the Higgs mass bound in singlet extention of the
MSSM
IPMU11-0138
Yukinobu Toda
Stability conditions and curve counting invariants on
Calabi-Yau 3-folds
arXiv:1103.4229 [math]
IPMU11-0139
Yukinobu Toda
Stable pairs on local K3 surfaces
arXiv:1103.4230 [math]
IPMU11-0140
Arend Bayer, Emanuele Macri, Yukinobu Toda
Bridgeland stability conditions on 3-folds I: BogomolovGieseker type inequalities
arXiv:1103.5010 [math]
IPMU11-0141
Arend Bayer, Aaron Bertram, Emanuele Macri, Yukinobu
Toda
Bridgeland stability conditions on 3-folds II: An
application to Fujita’s conjecture
arXiv:1106.3430 [math]
IPMU11-0142
Qing-Guo Huang, Chunshan Lin
Scale dependences of local form non-Gaussianity
parameters from a DBI isocurvature fieldarXiv:arXiv:1108.4474 [astro-ph]
IPMU11-0143
Mark Feshbach, Alexander A. Voronov
A higher category of cobordisms and topological quantum
field theory
Commun. Math. Phys., arXiv:1108.3349 [math]

Preprints

IPMU11-0095
Y.Q. Xue, B. Luo, W.N. Brandt, F.E. Bauer, B.D. Lehmer,
P.S. Broos, D.P. Schneider, D.M. Alexander, M. Brusa,
A. Comastri, A.C. Fabian, R. Gilli, G. Hasinger, A.E.
Hornschemeier, A. Koekemoer, T. Liu, V. Mainieri, M.
Paolillo, D.A. Rafferty, P. Rosati, O. Shemmer, J.D. Silverman,
I. Smail, P. Tozzi, C. Vignali
The Chandra Deep Field - South Survey: 4 Ms Source
Catalogs
ApJS, arXiv:1105.5643 [astro-ph]

IPMU11-0144
Yukinobu Toda
Multiple cover formula of generalized DT invariants I:
parabolic stable pairs
arXiv:1108.4992 [math]

IPMU Annual Report 2011

101

IPMU11-0158
A. Ibarra, E. Molinaro, S. T. Petcov
Low Energy Signatures of the TeV Scale See-Saw
Mechanism
Phys. Rev. D 84, 013005 (2011)

IPMU11-0146
Kazunori Nakayama, Fuminobu Takahahsi, Tsutomu T.
Yanagida
On the Adiabatic Solution to the Polonyi/Moduli Problem

IPMU11-0159
David Marzocca, Serguey T. Petcov, Andrea Romanino,
Martin SpinrathSizeable theta θ 13 from the Charged Lepton Sector in
SU(5), (Tri-)Bimaximal Neutrino Mixing and Dirac CP
Violation
arXiv:1108.0614 [hep-ph]

IPMU11-0147
Yuji Tachikawa
A strange relationship between 2d CFT and 4d gauge
theoryIPMU11-0148
L. Funar and T. Kohno
Images of quantum representations and finite index
subgroups of mapping class groups
arXiv:1108.4904 [math]
IPMU11-0149
T. Kohno
Quantum and homological representations of braid groups
Ann. Scoula Normale Pisa (2012)
IPMU11-0150
Emir Gumrukcuoglu, Shinji Mukohyama, Anzhong Wang
General relativity limit of Horava-Lifshitz gravity with ascalar field in gradient expansion
Phys. Rev. D (March issue), arXiv:1109.2609 [hep-th]
IPMU11-0151
Christian Schnell
The fundamental group is not a derived invariant
IPMU11-0152
Masamune Oguri, Matthew B. Bayliss, Haakon Dahle, Keren
Sharon, Michael D. Gladders, Priyamvada Natarajan, Joseph F.
Hennawi, Benjamin P. Koester
Combined strong and weak lensing analysis of 28 clusters
from the Sloan Giant Arcs Survey
MNRAS 420, 3213 (2012)
IPMU11-0153
Chiaki Kobayashi, Natsuko Izutani, Amanda I. Karakas,
Takashi Yoshida, David Yong, & Hideyuki Umeda
Evolution of Fluorine Abundances with the υ-Process
ApJ, 739, L57 (2011)
IPMU11-0154
Emir Gumrukcuoglu, Chunshan Lin, Shinji Mukohyama
Open FRW universes and self-acceleration from nonlinear
massive gravity
JCAP 11, 030 (2011)
IPMU11-0155
Ratindranath Akhoury, Shinji Mukohyama, Ryo Saotome
No classicalization beyond spherical symmetryarXiv:1109.3820 [hep-th]
IPMU11-0156
Neal Jackson, Hayden Rampadarath, Eran O. Ofek, Masamune
Oguri, Min-Su Shin
New Lensed Quasars from the MUSCLES Survey
MNRAS 419, 2014(2012)
IPMU11-0157
Amand Faessler, Aurora Meroni, Serguey T. Petcov, Fedor
Simkovic, John Vergados
Uncovering Multiple CP-Nonconserving Mechanisms of ββ-DecayPhys. Rev. D 83, 11303 (2011)

102

IPMU Annual Report 2011

IPMU11-0160
Mu-Chun Chen, Kalyana T. Mahanthappa, Aurora Meroni, S.
T. Petcov
Predictions for Neutrino Masses, ββ0ν - Decay and
Lepton Flavor Violation in a SUSY SU(5) × T́ Model of
FlavourarXiv:1109.0731 [hep-ph]
IPMU11-0161
Hee-Jong Seo, Masanori Sato, Masahiro Takada, Scott
Dodelson
Dark Energy from the log-transformed convergence field
Astrophys. J., arXiv:1109.5639 [astro-ph]
IPMU11-0162
Min-xin Huang, Amir-Kian Kashani-Poor, Albrecht Klemm
The Omega deformed B-model for rigid N=2 theories
arXiv:1109.5728 [hep-th]
IPMU11-0163
Yu Nakayama
Comments on scale but non-conformal supersymmetricfield theories
IPMU11-0164
Kwokwai Chan, Siu-Cheong Lau, and Naichung Conan Leung
SYZ mirror symmetry for toric Calabi-Yau manifolds
JDG, arXiv:1006.3830 [math]
IPMU11-0165
Siu-Cheong Lau, Naichung Conan Leung and Baosen Wu
Mirror maps equal SYZ maps for toric Calabi-Yau
surfaces
BLMS, arXiv:1008.4753 [math]

IPMU11-0171
Davide Gaiotto, Gregory W. Moore and Yuji Tachikawa
On 6d N=(2,0) theory compactified on a Riemann surface
with finite area
IPMU11-0172
Yu Nakayama
On epsilon-conjecture in a-theorem
IPMU11-0173
Hirosi Ooguri, Masaki Oshikawa
Axionic Instability in Topological Magnetic Insulators
IPMU11-0174
Junji Hisano, Koji Ishiwata, and Natsumi Nagata
Direct Detection of Dark Matter Degenerate with Colored
Particles in Mass
Phys. Lett. B.
IPMU11-0175
Takashi J. Moriya, Nozomu Tominaga
Diversity of Luminous Supernovae from Non-Steady Mass
Loss
Astrophys. J. TBD, arXiv:1110.3807 [astro-ph]
IPMU11-0176
Cartier, R., Forster, F., Coppi, P., Hamuy, M., Maeda, K.,
Pignata, G., Folatelli, G.
A study of the color diversity around maximum light in
Type Ia Supernovae
A&A in press, arXiv:1110.0480 [astro-ph]
IPMU11-0177
Masahiro Ibe, Shigeki Matsumoto, Tsutomu T. Yanagida
The GeV-scale dark matter with B-L asymmetry
IPMU11-0178
Alexander Getmanenko (IPMU), Dmitry Tamarkin(Northwestern Univ)
Microlocal properties of sheaves and complex WKB
IPMU11-0179
Takeshi Kobayashi, Fuminobu Takahashi, Tomo Takahashi,
Masahide Yamaguchi
Dark Radiation from Modulated Reheating
arXiv:1111.1336 [hep-ph]

IPMU11-0166
Yuji Tachikawa
On S-duality of 5d super Yang-Mills on S1

IPMU11-0180
Noriaki Ogawa, Tadashi Takayanagi, Tomonori Ugajin
Holographic Fermi Surfaces and Entanglement Entropy
JHEP 1201, 125 (2012)

IPMU11-0167
Motoi Endo, Sho Iwamoto
LHC Dijet Signals in New Physics Models for Top
Forward-Backward Asymmetry
JHEP

IPMU11-0181
Koichi Hamaguchi, Kazunori Nakayama, Norimi Yokozaki
A Solution to the mu/Bmu Problem in Gauge Mediation
with Hidden Gauge SymmetryarXiv:1111.1601 [hep-ph]

IPMU11-0168
Siu-Cheong Lau, Naichung Conan Leung and Baosen Wu
A relation for Gromov-Witten invariants of local CalabiYau threefolds
MRL Volume 18, 937-942 (2011)

IPMU11-0182
Valentin Tonita
A virtual Kawasaki formula
arXiv:1110.3916 [math]

IPMU11-0169
Satoshi Kondo, Seidai Yasuda
The Riemann-Roch theorem without denominators inmotivic homotopy theory
IPMU11-0170
Cosimo Bambi
Can we constrain the maximum value for the spinparameter of the super-massive objects in galactic nuclei
without knowing their actual nature?
Phys. Lett. B 705, 5(2011)

IPMU11-0183
Masayuki Tanaka, Alexis Finoguenov, Simon Lilly, John
Silverman et al.
X-ray Groups of Galaxies at 0.5 < z < 1 in zCOSMOS:
Increased AGN Activities in High Redshift Groups
PASJ 2012 April issue, arXiv:1110.0979 [astro-ph]
IPMU11-0184
Masayuki Tanaka
A Novel Method to Identify AGNs Based on Emission Line
Excess and the Nature of Low-luminosity AGNs in the
Sloan Digital Sky Survey: I – A Novel Method
PASJ 2012 April issue, arXiv:1111.0132 [astro-ph]

IPMU11-0185
Masayuki Tanaka
A Novel Method to Identify AGNs Based on Emission Line
Excess and the Nature of Low-luminosity AGNs in the
Sloan Digital Sky Survey: II - Nature of Low-luminosity
AGNs
PASJ 2012 April issue, arXiv:1111.0133 [astro-ph]
IPMU11-0186
Jason L. Evans, Masahiro Ibe, John Kehayias, Tsutomu T.
Yanagida
Three Generations Ordered by Non-Anomalous Discrete
R-Stymmetry
IPMU11-0187
Masaki Asano, Takeo Moroi, Ryosuke Sato, Tsutomu T.
Yanagida
The Focus Point Assisted by the Seesaw
IPMU11-0188
Masaki Asano, Takumi Ito, Shigeki Matsumoto, Takeo Moroi
Exploring Supersymmetric Model with Very Light
Gravitino at the LHC
IPMU11-0189
Emir Gumrukcuoglu, Chunshan Lin, Shinji Mukohyama
Cosmological perturbations of self-accelerating universe in
nonlinear massive gravity
JCAP 03, 006 (2012)
IPMU11-0190
Koichi Hamaguchi, Takeo Moroi, Kyohei Mukaida
Boltzmann equation for non-equilibrium particles and its
application to non-thermal dark matter production
arXiv:1111.4594 [hep-ph]
IPMU11-0191
C. A. Keller, N. Mekareeya, J. Song, Y. Tachikawa
The ABCDEFG of instantons and W-algebras
IPMU11-0192
David W. Fallest, Takaya Nozawa, Kenichi Nomoto, Hideyuki
Umeda, Keiichi Maeda, Takashi Kozasa, Davide Lazzati
On the Effects of Microphysical Grain Properties on the
Yields of Carbonaceous
MNRAS 418, 571 (2011)
IPMU11-0193
Shimizu, T., Kawara, K., Sameshima, H., Ienaka, N., Nozawa,T., Kozasa, T.
Extinction Law in Ultraluminous Infrared Galaxies at
z~1
MNRAS 418, 625 (2011)
IPMU11-0194
Kiyokazu Nagatomo and Akihiro Tsuchiya
The triplet vertex operator algebra W(p) and the restricted
quantum group overline Ūq (sl2) at q=exp πi
P
ASPM 61, 1-49 (2011)
IPMU11-0195
Brian Feldstein, William Klemm
Large Mixing Angles From Many Right-Handed Neutrinos
IPMU11-0196
Sergey V. Ketov and Alexei A. Starobinsky
Inflation and non-minimal scalar-curvature coupling in
gravity and super-gravity
http://th-workshop2011.desy.de/e86229/
IPMU11-0197
Richard Eager and Sebastian Franco
Colored BPS Pyramid Partition Finctions, Quivers andCluster Transformations

IPMU Annual Report 2011

Preprints

IPMU11-0145
Yukinobu Toda
Multiple cover formula of generalized DT invariants II:
Jacobian localizations
arXiv:1108.4993 [math]103

IPMU11-0199
Mircea Voineagu, Jeremiah Heller
Remarks on filtrations of the homology of real varieties
Doc. Math., arXiv:1110.1836v1 [math]
IPMU11-0200
Gomez, H. L., Clark, C. J. R., Nozawa, T., Krause, O., Gomez,
E. L., Matsuura, M., Barlow, M. J., Besel, M.-A., Dunne,L., Gear, W. K., Hargrave, P., Henning, Th., Ivison, R. J.,
Sibthorpe, B., Swinyard, B. M., Wesson, R.
Dust in Historical Galactic Type Ia Supernova Remnantswith Herschel
MNRAS, arXiv:1111.6627 [astro-ph]
IPMU11-0201
Hirotaka Hayashi, Teruhiko Kawano and Taizan Watari
Constraints on GUT 7-brane Topology in F-theory
Phys. Lett. B, arXiv:1112.2032 [hep-th]
IPMU11-0202
Teruhiko Kawano, Yoichi Tsuchiya and Taizan Watari
A Note on Kahler Potential of Charged Matter in F-theory
Phys. Lett. B, arXiv:1112.2987 [hep-th]
IPMU11-0203
Patrick Valageas, Masanori Sato, Takahiro Nishimichi
Modeling of weak lensing statistics. I. Power spectrum andbispectrum
A&A, arXiv:1111.7156 [astro-ph]
IPMU11-0204
Patrick Valageas, Masanori Sato, Takahiro Nishimichi
Modeling of weak lensing statistics. II. Configurationspace statistics
A&A, arXiv:1112.1495 [astro-ph]
IPMU11-0205
Masahiro Kawasaki, Naoya Kitajima, Kazunori Nakayama
Revisiting the cosmological coherent oscillation
JCAP
IPMU11-0206
Takeo Moroi, Ryosuke Sato, Tsutomu T Yanagida
Extra Matters Decree the Relatively Heavy Higgs of Massabout 125 GeV in the Supersymmetric Model
IPMU11-0207
Masahiro Ibe, Tsutomu T. Yanagida
The Lightest Higgs Boson Mass in Pure Gravity Mediation
Model
IPMU11-0208
Matthew Sudano
The Romelsberger Index, Berkooz Deconfinement, andInfinite Families of Seiberg Duals
JHEP
IPMU11-0209
Mihnea Popa and Christian Schnell
Generic vanishing theory via mixed Hodge modules
arXiv:1112.3058 [math]
IPMU11-0210
Yukinobu Toda
Bogomolov-Gieseker type inequality and counting
invariants
arXiv:1112.3411 [math]
IPMU11-0211
Sergei V. Ketov, Genta Michiaki, Tsukasa Yumibayashi
Quantizing with a Higher Time Derivative
arxiv:1110.1155v3

104

IPMU Annual Report 2011

IPMU11-0212
Motoi Endo, Koichi Hamaguchi, Sho Iwamoto, Norimi
Yokozaki
Higgs mass, muon g-2, and LHC prospects in gauge
mediation models with vector-like matters
IPMU11-0213
Masahiro Kawasaki, Tomohiro Takesako
Hubble Induced Mass in Radiation Dominated Universe
Phys. Lett. B
IPMU11-0214
Seok-Jin Kang, Masaki Kashiwara and Shunsuke Tsuchioka
Quiver Hecke superalgebras
arXiv:1107.1039 [math]
IPMU11-0215
Motoi Endo, Koichi Hamaguchi, Sho Iwamoto, Kazunori
Nakayama, Norimi
Yokozaki
Higgs mass and muon anomalous magnetic moment in theU(1) extended MSSM
arXiv:1112.6412 [hep-ph]
IPMU11-0216
Jyotirmoy Bhattacharya, Noriaki Ogawa, Tadashi Takayanagi,
Tomonori Ugajin
Soliton Stars as Holographic Confined Fermi Liquids
JHEP 1202, 137 (2012)
IPMU12-0001
Akihiro Tsuchiya, Simon Wood
The tensor structure on the representation category of theWp triplet algebra
Commun. Math. Phys., arXiv:1201.0419 [hep-th]
IPMU12-0002
Sergei V. Ketov
F(R) Supergravity and Early Universe: the Meeting Pointof Cosmology and High-Energy Physics
IPMU12-0003
Alexander Kusenko, M.B. Voloshin
A gamma-ray signature of energetic sources of cosmic-ray
nucleiPhys. Lett. B 707, 255 (2012)
IPMU12-0004
Wenjuan Fang, Kenji Kadota, Masahiro Takada
Cross-correlating the Thermal Sunyaev-Zel’dovich Effectand the Distribution of Galaxy Clusters
Phys. Rev. D, arXiv:1109.4934 [astro-ph]
IPMU12-0005
D. Marrone, M. Takada et al.
LoCuSS: The Sunyaev-Zel’dovich Effect and Weak
Lensing Mass Scaling Relation
Astrophys. J., arXiv:1107.5115 [astro-ph]
IPMU12-0006
Johannes Schmude
On supersymmetry breaking three-form flux on SasakiEinstein manifolds
JHEP
IPMU12-0007
Yu Nakayama
CP-violating CFT and trace anomaly
IPMU12-0008
Jason L. Evans, Masahiro Ibe, Satoshi Shirai, and Tsutomu T.
Yanagida
A 125 GeV Higgs Boson and Muon g-2 in More Generic
Gauge
Mediation

IPMU12-0009
Ivan Cheltsov, Constantin Shramov
Weakly-exceptional singularities in higher dimensions
Crelle, arXiv:1111.1920 [math]

IPMU12-0022
Valentin Tonita
Twisted orbifold Gromov-Witten invariants
arxiv:1202.4778 [math]

IPMU12-0010
Kwang Sik Jeong and Fuminobu Takahashi
Light Higgsino from Axion Dark Radiation

IPMU12-0023
Shinta Kasuya, Etsuko Kawakami, Masahiro Kawasaki
Axino dark matter and baryon number asymmetry rom
Q-ball decay in gauge mediation
JCAP, arXiv:1202.4067 [hep-ph]

IPMU12-0011
A. Gando, Y. Gando, H. Hanakago, H. Ikeda, K. Inoue,
R. Kato, M. Koga, S. Matsuda, T. Mitsui, T. Nakada, K.
Nakamura, A. Obata, A. Oki, Y. Ono, I. Shimizu, J. Shirai, A.
Suzuki, Y. Takemoto, K. Tamae, K. Ueshima, H. Watanabe,
B. D. Xu, S. Yamada, H. Yoshida, A. Kozlov, S. Yoshida, T. I.
Banks, J. A. Detwiler, S. J. Freedman, B. K. Fujikawa, K. Han, T. O’Donnell, B. E. Berger, Y. Efremenko, H. J. Karwowski,
D. M. Markoff, W. Tornow, S. Enomoto, M. P. Decowski
Measurement of the Double-Beta Decay Half-life of 136Xe
in KamLAND-Zen
Phys. Rev. Lett., arXiv:1201.4664 [hep-ex]
IPMU12-0012
Kyoji Saito
Inversion formula for the growth function of a cancellative
monoidIPMU12-0013
Ingo Runkel, Matthias R. Gaberdiel, Simon Wood
Logarithmic bulk and boundary conformal field theory
and the full centre construction
arxiv:1201.6273
IPMU12-0014
K. Yonekura
On the Trace Anomaly and the Anomaly Puzzle in N=1
pure Yang-Mills
IPMU12-0015
Naomi Ota, Masamune Oguri, Xinyu Dai, Christopher S.
Kochanek, Gordon T. Richards, Eran O. Ofek, Roger D.
Blandford, Tim Schrabback, Naohisa Inada
The Chandra View of the Largest Quasar Lens SDSS
J1029+2623
Astrophys. J., arXiv:1202.1645 [astro-ph]
IPMU12-0016
Masahiro Ibe, Shigeki Matsumoto, Tsutomu T. Yanagida
Pure Gravity Mediation with m3/2 = 10 - 100 TeV
IPMU12-0017
Yamaguchi, H., Tanakam M., Maeda, K., Slane, P.O., Foster,A., Smith, R.K., Katsuda, S., Yoshii, R.
Elemental Abundances in the Possible Type Ia Supernova
Remnant G344.7-0.1
Astrophys. J. in press, arXiv:1202.1588 [astro-ph]
IPMU12-0018
Masaki Asano, Shigeki Matsumoto, Masato Senami, Hiroaki
Sugiyama
Comprehensive Analysis on the Light Higgs Boson
Scenario
IPMU12-0019
Koichi Hamaguchi, Tetsuo Hatsuda, Masayasu Kamimura,
Tsutomu T. Yanagida
Stau-catalyzed d-t Nuclear Fusion
IPMU12-0020
Motoi Endo, Koichi Hamaguchi, Sho Iwamoto, Norimi
YokozakiVacuum Stability Bound on Extended GMSB Models
IPMU12-0021
Masahiro Kawasaki, Alexander Kusenko, Tsutomu T.
Yanagida
Primordial seeds of supermassive black holes
Phys. Lett. B

IPMU12-0024
Etsuko Kawakami, Masahiro Kawasaki, Koichi Miyamoto,Kazunori Nakayama, Toyokazu Sekiguchi
Non-Gaussian isocurvature perturbations in darkradiation
JCAP, arXiv:1202.4890 [astro-ph]
IPMU12-0025
Takashi Hiramatsu, Masahiro Kawasaki, Ken’ichi Saikawa,Toyokazu Sekiguchi
Production of dark matter axions from collapse of stringwall systems
Phys. Rev. D
IPMU12-0026
Oscar Chacaltana, Jacques Distler, Yuji Tachikawa
Nilpotent orbits and codimension-two defects of the 6d
N=(2,0) theory
IPMU12-0027
Kazunori Nakayama, Fuminobu Takahashi, Tsutomu T.
Yanagida
Gravity mediation without a Polonyi Problem
IPMU12-0028
Kazunori Nakayama, Fuminobu Takahashi
PeV-scale Supersymmetry from New Inflation
arXiv:1203.0323 [hep-ph]
IPMU12-0029
Tomohiro Abe, Mitsuru Kakizaki, Shigeki Matsumoto, Osamu
Seto
Vector WIMP Miracle
IPMU12-0030
Yu Nakayama
Holographic Renormalization of Foliation Preserving
Gravity and Trace Anomaly
IPMU12-0031
Naohisa Inada, Masamune Oguri, Min-Su Shin, Issha Kayo,Michael A. Strauss, Tomoki Morokuma, Cristian E. Rusu,
Masataka Fukugita, Christopher S. Kochanek, Gordon T.
Richards, Donald P. Schneider, Donald G. York, Neta A.
Bahcall, Joshua A. Frieman, Patrick B. Hall, Richard L. WhiteThe Sloan Digital Sky Survey Quasar Lens Search. V.
Final Catalog from the Seventh Data Release
Astrophys. J., arXiv:1203.1087 [astro-ph]
IPMU12-0032
Masamune Oguri, Naohisa Inada, Michael A. Strauss,
Christopher S. Kochanek, Issha Kayo, Min-Su Shin, Tomoki
Morokuma, Gordon T. Richards, Cristian E. Rusu, Joshua A.
Frieman, Masataka Fukugita, Donald P. Schneider, Donald G.
York, Neta A. Bahcall, Richard L. WhiteThe Sloan Digital Sky Survey Quasar Lens Search. VI.
Constraints on Dark Energy and the Evolution of Massive
Galaxies
Astrophys. J., arXiv:1203.1088 [astro-ph]
IPMU12-0033
Takashi J. Moriya, Keiichi Maeda
Dip after Precursor of Super-Luminous Supernovae:
An Evidence of Shock Breakout in Dense Circumstellar
MediumAstrophys. J. Lett., arXiv:1203.1451 [astro-ph]

IPMU Annual Report 2011

Preprints

IPMU11-0198
Yu Nakayama
Gravity Dual for Hofman-Strominger Theorem

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IPMU12-0034
Masaomi Tanaka, Takashi J. Moriya, Naoki Yoshida, Ken’ichi
NomotoDetectability of High-Redshift Superluminous Supernovae
with Upcoming Optical and Near-Infrared Surveys
MNRAS TBD, arXiv:1202.3610 [astro-ph]
IPMU12-0035
Masahiro Ibe, Ryosuke Sato
The Standard Model-like Higgs Boson Mass in R-invariant
Gauge Mediation
IPMU12-0036
Christian Schnell
Cohomology of holonomic and constructible complexes on
abelian varieties
arXiv:1112.3582 [math]
IPMU12-0037
N. Banerjee, J. Bhattacharya, S. Bhattacharyya, S. Jain, S.
Minwalla and T. Sharma
Constraints on Fluid Dynamics from Equilibrium
Partition Functions
IPMU12-0038
Toshiyuki Kobayashi
Branching problems of Zuckerman derived functor
modulesContemporary Mathematics, 557, 23 (2011)
IPMU12-0039
Joachim Hilgert, Toshiyuki Kobayashi, Gen Mano, Jan
Moellers
Orthogonal polynomials associated to a certain fourthorder differential equation
Ramanujan Journal 26, 295-310 (2011), arXiv:0907.2612[math]
IPMU12-0040
Toshiyuki Kobayashi
Algebraic analysis of minimal representations
Publ. RIMS 47, 585-611 (2011), arXiv:1001.0224 [math]
IPMU12-0041
Joachim Hilgert, Toshiyuki Kobayashi, Gen Mano, Jan
Moellers
Special functions associated to a certain fourth orderdifferential equation
Ramanujan Journal 26, 1-34 (2011)

IPMU12-0046
Fanny Kassel, Toshiyuki Kobayashi
Stable spectrum for pseudo-Riemannian locally symmetricspacesC. R. Math. Acad. Sci. Paris 349, 29-33, (2011)
IPMU12-0047
Toshiyuki Kobayashi, Bent Oersted, Michael Pevzner
Geometric analysis on small unitary representations ofGL(n,R)
J. Funct. Anal. 260, 1682-1720 (2011)
IPMU12-0048
J.-L. Clerc, Toshiyuki Kobayashi, B. Oersted, M. PevznerGeneralized Bernstein-Reznikov integrals
Math. Ann., 349, 395 (2011)
IPMU12-0049
Toshiyuki Kobayashi
Propagation of multiplicity-free property for holomorphic
vector bundles
Progr. Math. in press, arXiv:0607004 [math]
IPMU12-0050
Saleim Ben Saiid, Toshiyuki Kobayashi, Bent Oersted
Laguerre semigroup and Dunkl operators
Compo Math in press, arXiv:0907.3749 [math]
IPMU12-0051
Toshiyuki Kobayashi
Restrictions of generalized Verma modules to symmetricpairs
Transformation Groups, 17, 523 (2012)
IPMU12-0052
B. Bakalov, T. Milanov
W-constraints for the total descendant potential of asimple singularity
Compos. Math., arXiv:1203.3414 [math-ph]
IPMU12-0053
Toshitake Kohno
Homological representations of braid groups and KZ
connections
J. of Sing. 2012

IPMU12-0042
Toshiyuki Kobayashi
Geometric analysis on minimal representations
Ninth Oka Symposium Lecture Notes (edited by J. Matsuzaka
and S. Tsunoda), 27 (2011)
IPMU12-0043
Toshiyuki Kobayashi
Geometric quantization in the Non-compact Setting
Oberwolfach Report (edited by L. Jeffery, X. Ma and M.
Vergne), 8, 466 (2011)

Preprints

IPMU12-0044
Toshiyuki Kobayashi, Gen Mano
The Schroedinger model for the minimal representation of
the indefinite orthogonal group O(p, q)
Memoirs of Amer. Math. Soc., 1000, 132 (2011)
IPMU12-0045
Toshiyuki Kobayashi, Jan Moellers
An integral formula for L2 -eigenfunctions of a fourthorder Bessel-type differential operator
Integral Transforms and Special Functions 22, 521-531 (2011)

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IPMU Annual Report 2011

IPMU Annual Report 2011107

14 Outreach and Public

Communications

W

e continue to emphasize public awareness of physics and mathematics of the universe through an organized series of public lectures, collaboration with media on
TV shows, “ science schools” for middle and high school students, and other means.
Japan has been quite effective in communicating exciting discoveries in science and advancesin technology to the public at large, inspiring young minds to enter science and engineering.
We certainly follow this good track record and further strengthen the public outreach.

“Uncovering the nature of quarks” by Taizan
Watari during the Campus Day of the Kashiwa
Campus (October 22).

Public Lectures and Science Events“Subaru telescope and dark energy” by Hiroshi Karoji (April 23)

Professor Jerome Freedman ofMIT, who received the 1990 Nobel
Physics Prize for his experimental
study that had led to the discoveryof quarks, gave a public lecture“Exploring the universe at the largest and smallest distances.” It washeld on the Hongo Campus. Whilehis distinguished accomplishment
was done at then the smallest distances, he explained its fascinating
link to the largest distance world,
namely the universe. The lecture
was conducted with a simultaneoustranslation by Hiroaki Aihara (October 6).

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IPMU Annual Report 2011

Tadashi Takayanagi chats with the participants after his IPMU-ICRR Joint Public Lecture “Exploring
black halls with string theory” that was held on the
Hongo Campus (November 12).

Hitoshi Murayama was surrounded by high school students attending the Joint WPI Symposium in Fukuoka(November 12).

Outreach and Public Communications

A series of three public lectures were presented at the IPMU Science Cafe which was held at Tamarokuto Museum in Tokyo. Karoji’s lecture of April 23 was followed by “Introduction to Galois theory” by Satoshi Kondo (May 28) and “Creating dark matter on earth” by Shigeki Matsumoto (June25).

“Mystery of accelerating universe” by Takahiro Nishimichi at the Kashiwa Planetarium (November 19).

IPMU Annual Report 2011109

Hitoshi Murayama greets Motohisa Furukawa, theState Minister in charge of national strategy, economic and fiscal policy during Science and Technology Festa in Kyoto (December 17–18).

IPMU joined the other five WPI institutes in a
poster exhibition during The American Association
for the Advancement of Science General Meetingin Vancouver, Canada(February 17–19, 2012).

Outreach and Public Communications

A special event dedicated to the SuMIRe Project “The Universe—its history and fate” took place at the Marunouchi Building Hall in downtown Tokyo during the 2nd PFS collaboration meeting. The PFS stands forPrimeFocusSpectrograph and a part of the SuMIRe Project. Three lectures, “Dark energy and the fate of ouruniverse” by Hitoshi Murayama, “Taking photos of the baby universe—Strange universe filled with dark matter and dark energy” by David Spergel (Princeton and IPMU) and “Cosmic dawn—The quest for the first stars
and galaxies” by Richard Ellis (Caltech), were followed by a panel discussion (January 10, 2012).

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IPMU Annual Report 2011111

Reaching Out to Future Scientists

Ask a Scientist

We organized a special program for female students at the junior high school and high schoollevels. It is an important part of our reaching out
to the future scientists. Optionally, the parents
were also invited so that they actually could meet
our women researchers who could become a rolemodel for their daughters (November 26).

“Ask a Scientist” is a video clip that we release on the website. Scientific terms are explained for general public
in just one minute. Six editions were broadcasted during FY2011.

IPMU NEWS

Gravitational Lens Effect
Masahiro Takada

Hubble Sequence
Masayuki Tanaka

Supernova Explosions
Masaomo Tanaka

Group Theory
Tomoyuki Abe2011 Nobel Physics Prize
Hitoshi Murayama

10–dimensional Space-time
Johanna Knapp

IPMU Community

Outreach and Public Communications

Twenty high school students from all parts ofJapan attended three-day science camp “Physics
and mathematics for exploring the universe.” They
learned how to arrive at “shrinking” space-time in
special relativity. They “counted infinity” using toy
models of fermions and bosons. They also learned
how various numbers were discovered while attempting to solve equations (December 26–28).

We published four more editions of IPMU NEWS in this period. They cover a wide range of information including conferences and seminars, research highlights and newly arrived members. They also feature interesting topics in other fields of science.

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IPMU Annual Report 2011

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IPMU

April 2011–March 2012

Annual Report 2011

IPMU

ANNUAL REPORT 2011

April 2011– March 2012

Institute for the Physics and Mathematics of the Universe (IPMU)
Todai Institutes for Advanced Study
The University of Tokyo
5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8583, Japan TEL: +81-4-7136-4940 FAX: +81-4-7136-4941 http://www.ipmu.jp/
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Research Center Initiative

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