IPMU ANNUAL REPORT 2009

IPMU
Annual Report
2009

April 2009 — March 2010

April 2009 — March 20105-1-5 Kashiwanoha, Kashiwa, Chiba 277-8583, Japan
Tel: +81-4-7136-4940 Fax: +81-4-7136-4941
http://www.ipmu.jp/

Institute for the Physics and Mathematics of the Universe (IPMU)

Institute for the Physics and Mathematics of the Universe (IPMU)
The University of Tokyo

IPMU ANNUAL REPORT 2009
April 2009—March 2010

History of IPMU
(April 2009 — March 2010)

May• Focus Week: New Invariants and Wall Crossing

June• International Conference: Dark Energy (including Public Lecture)July• Public Lecture

August				• External Advisory Committee Meeting• Site Visit by WPI Program Director and Program Officers• Program to Inspire Female Students with Science

September • Yukawa-Tomonaga Memorial Prize to Shigeki Sugimoto		• “SuMIRe” Project Approved by the Council for Science and Technology Policy		• Press release “The Most Luminous Type Ia Supernova”
		• Focus Week: Statistical Frontier of Astrophysics
October				• 2nd Anniversary of IPMU, All Hands Meeting and Reception• Kashiwa Campus Open House, Public lecture and Exhibition• IPMU-ICRR Joint Public Lecture

November
		
		
		
		

• Workshop: Quantizations, Integrable Systems and Representation Theory• Nishina Memorial Prize to Hirosi Ooguri• Focus Week: QCD in Connection with BSM Study at LHC• Workshop: Recent Advances in Mathematics at IPMU
• Focus Week: Epoch of Re-ionization

December • Focus Week: Indirect Dark Matter Search		• Launch of IPMU Berkeley satellite

Copyright © IPMU Annual Report 2009
All rights reserved
Editorial board members
K. Abe (chair), M. Nakahata, K. Nomoto, K. Saito, T. Yanagida
Institute for the Physics and Mathematics of the Universe
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/
Print: KOHMURA Inc.

2010 January
		
		
		
		

• Workshop: Elliptic Fibration and F-Theory• Site Visit by WPI Administrative Officers• Move Into New IPMU Building• “Science Cafe - Universe” (3 Public Lectures from January to March)• Visit of MEXT Vice Minister Masaharu Nakagawa

February		• Inauguration Ceremony of NEW IPMU Building• Focus Week: Condensed Matter Physics Meets High Energy Physics

March
		
		
		
		

• Workshop: Geometry of lattices and infinite dimensional Lie algebra• Science Camp “New Encounter of Modern Mathematics and Modern Physics”• UT President Award to Masaomi Tanaka• ASJ Young Astronomer Award to Keiichi Maeda• Yoji Totsuka Prize to Takaaki Kajita

History of IPMU

• Focus Week: Non-Gaussianities in the Sky• IPMU-ICRR Joint Public Lecture

32009 April		■ Composition of the universe

5“Everything is made of atoms” has been
the main driving force responsible for an
impressive progress over the past two centuries
to understand the nature around us. But thisapproach that dominated the way we see theuniverse went through a revolutionary changeover the past ten years.
The whole thing started with a 1998
discovery that the speed of expansion of theuniverse is accelerating. The expansion itself
was predicted by Einstein’s theory of generalrelativity. Being a part of gravity phenomena,
however, the expansion must behave like themotion of a ball thrown upwards, namely thegravitational pull should eventually slow down
the expansion. Instead, the speed of expansion
which appeared to have been slowing down
shifted toward an accelerated increase since■ Hitoshi Murayama
about 7 billion years ago. Equivalently,
IPMU Director
according to the Einstein’s theory, the energy inthe space is increasing. This is called dark energy, the energy which pops out of the universe as
it expands. If true, this mysterious dark energy occupies approximately 73% of the universe. The
discovery has been so shocking that some even conjectured that the Einstein’s theory may be
wrong. It has been a fascinating mystery among scientists worldwide, and fierce competition tosettle the issue has been taking place in Europe and US, in particular.
Meanwhile, Japanese experiments Super-Kamiokande in the same year and KamLAND in
2002 revealed that neutrinos carry tiny but finite mass. Furthermore, it was established by 2003
that more than 80% of matter in the universe is made of something completely different fromordinary atoms. It is called dark matter. It does not emit light, and therefore invisible to us, sothat the existence was establishedonly by observing its gravitational
pull with nearby objects. We now
know that the universe is made of
4.4% ordinary atoms and 23% dark
matter, of which neutrinos take up
somewhere above 0.1% but lessthan 1%. In total, more than 95%
of the universe is dominated byunknown object, altering our viewof the origin of the universe and its
future.

Mission

1. Mission

Mission
6

The universe is believed tohave started as a hot fire-ball fromthe Big-Bang 13.7 billion years
ago, as a flat and structure-lessstate at the beginning. But soon
the dark matter began to clusterby the gravitational pull, andeventually pulling ordinary matter.
They then evolved together intostars and galaxies. At IPMU, we
are working to “see” the evolving
processes of the universe from the■ Evolution of large-scale structure of the universe and dark mattervery beginning, and to “predict”
distribution.
where we are heading.
We develop an optical instrument that is attached to the Subaru telescope and allows
observation of more than 30 million distant galaxies. This provides three-dimensional mappingof dark matter, and may also reveal the true nature of dark energy.
We use three underground detectors, Super-Kamiokande to study neutrino astronomy
in general but putting emphasis on search for neutrinos from ancient supernova explosions,
KamLAND to study neutrino geophysics but putting emphasis on search for neutrino-less double
beta decay, and XMASS to directly search for dark matter in our galaxy.
We study phenomenology in particle physics to explore physics beyond the Standard
Model. Data from collider detectors and astrophysical observations are closely examined for any
clue of dark matter candidates, extra dimensions, or other exotic phenomena.
Investigation of dark matter and dark energy requires further development of theory andmathematics. Superstring theory, which unifies general relativity and quantum theory and isconsidered as a candidate for the ultimate unified theory of elementary particles, requires further
investigation of geometrical properties of the theory. At IPMU, mathematicians and physicists
work closely in this problem. String theory, if indeed the ultimate theory, should give consistentanswers to a wider subjects in physics. String theorists at IPMU initiate active collaboration
with condensed matter physicists of other institutions in the area such as superconductivity.
Systematic investigation to apply superstring theory to particle physics phenomena such as low
energy baryon physics is also pursued at IPMU.

Contents
1

Mission............................................. 52

Introduction........................................ 93

Organization................................... 13

4

Staff................................................ 17

5

Research Program............................ 19

6

Research Highlight............................ 51

7

Seminars......................................... 63

8

Conferences..................................... 69

9

Conference Talks.............................. 71

10 Visitors............................................ 79
11 Publications..................................... 85
12 Preprints.......................................... 97
13 Outreach and Public Communications.... 107

This report covers research activities at IPMU during the JFY 2009 (April 2009 - March
2010). The JFY 2009 was an eventful, yet exciting and very productive year. In August, Council
for Science and Technology Policy of the Government approved “SuMIRe (Subaru Measurementof Image and Red-shifts)”, a five year project to build a next generation camera for the Subaru
telescope in collaboration with National Astronomical Observatory. This was a big boost for ourgoal to understand dark matter and dark energy. The new instrument will allow us to observe
the distribution and spectra for more than 30 million distant galaxies within a few years timescale, thus providing unbiased information about the history of expanding universe. Thencame a widely publicized “Government Revitalization Unit Hearing” to review more than 400
government-funded research programs. Fortunately the effect on IPMU was minimal.
In January the construction of anxiously waited new IPMU building was completed. An
inauguration ceremony of the new 6,000 square meter building was held on February 23rd,2010 at Piazza Fujiwara, a large open space that occupies the center of the building from the
3rd floor and up. Among the speakers in the ceremony was Hidetoshi Ohno, UT professor of
the Graduate School of Frontier Sciences, who designed the building. He explained his designconcept, which is to give the place a power to attract scientists and to induce interactions.
Standing in the middle of the Piazza Fujiwara is an obelisk inscribing ancient Italian words

Introduction

2. Introduction

meaning “The universe is written in the language of mathematics.” It was taken from
Galileo’s 1623 work Il Saggiatore and describes precisely the concept of our institute, wheremathematicians and physicists work together to solve the mysteries of the universe. It waschosen so that we remember a great man who lived at the dawn of modern cosmology.
The inauguration ceremony brought us not just a new building, but an extremely
encouraging support from the university. The University of Tokyo President, Junichi Hamada,in his speech at the ceremony stated, “The University has actually been discussing aninterdisciplinary system of Institute for Advanced Study as its permanent entity, and we aremaking progress towards its establishment. I express my commitment here that we will integrate
IPMU into the University as one of such
Institute; sustain IPMU beyond the durationof the WPI funding; and give tenure to a partof the IPMU faculty without sacrificing the
traditional University positions.”
We expanded full time scientific staff to
11 professors, 8 associate professors, 5 assistantprofessors, and 36 postdoctoral fellows. Total
number of scientific staff including principal
investigators, full time staff, joint appointments,
students and long-term visitors (more than one
month) reached 165 as compared with 125 one ■ The University of Tokyo President Junichi
year ago. We published 100 papers in refereed Hamada addressing at the inauguration ceremony
journals and produced 178 preprints, many of for the new IPMU building.

9

UNIVERSO É SCRITTO IN LINGUA MATEMATICA

Introduction■ Number of IPMU Research staff
NumberForeign

FemalePrincipal Investigators

19

6

1

Faculty (not including 5 PIs)

19

6

0

Postdoctoral Fellows

36

29

3

Joint Appointments

59

22

3

Long-term Visitors

30

29

3

Students

2

2

0

Total

165

92

10

Several IPMU staff members received honors and awards for their scientific achievements.
Shigeki Sugimoto received Yukawa-Tomonaga Memorial Prize for his work on holographic
QCD approach for understanding hadron physics, which is an important application ofsuperstring theory to testable phenomena. Hirosi Ooguri received Nishina Memorial Prize on
his contribution to topological superstring theory. Keiichi Maeda received Astronomical Societyof Japan Young Astronomer Award for his work on theoretical and observational investigationof supernova explosions. Takaaki Kajita received the first Yoji Totsuka Prize for the discovery
of atmospheric neutrino oscillation. Masaomi Tanaka was awarded the University of Tokyo
President Award for his work on theoretical and observational investigation of supernova
explosions.
Introduction

which are being submitted to refereed journals. Noteworthy is a paper by Hirosi Ooguri and
Masahito Yamazaki on decoding quantum states of black holes using crystal melting model insuperstring theory, and a paper by Ken’ichi Nomoto and collaborators on observation of mostluminous type-Ia supernova. We hosted 11 international conferences and held 140 seminars.
We were visited by 432 scientists, of which 345 from abroad.

■ Research Activities at IPMU in JFY2009
Seminars

10

Visitors (foreign)11140432 (345)

Preprints

178

Publications

100■ Shigeki Sugimoto
Yukawa-Tomonaga
Prize■ Masaomi Tanaka
UT President Award■ Hirosi Ooguri at the Nishina Prize awarding ceremony.

■ IPMU research staff gathered for the all hands meeting in October.

■ Takaaki Kajita
Yoji Totsuka Prize■ Keiichi Maeda
ASJ Young
Astronomer Award

11

Conferences3. Organization■ The SAC members as of March 2010
H. Aihara

IPMU Deputy Director

Y. Suzuki

IPMU Deputy Director

T. Kohno

Graduate School for Mathematical Sciences, U of Tokyo

H. Ooguri

CaltechK. Saito

IPMU

D. Spergel

Princeton U

T. Yanagida

IPMU

Organization

Introduction

The IPMU Director is appointed by the President of the University of Tokyo and reports
directly to the President. The Director has a complete authority of making a wide range ofdecisions including proposing recruitment of the Principal Investigators to the President, andappointing other research staff and administrative staff. The Director is assisted by two Deputy
Directors and Administrative Director. They hold the Executive Board Meeting (EBM) regularly
to ensure smooth operation of the Institute. The EBM has direct access to the Office of the
President for consultations on both scientific and administrative matters.
The Scientific advisory Committee (SAC) gives advice to the Director on hiring scientificstaff and setting scientific strategies. As of March 2010, the members consist of two Deputy
Directors and five among IPMU’s nineteen Principal Investigators, all appointed by the Director.

12

The External Advisory Committee (EAC), appointed by the University President, reviews
annually the scientific achievement and activities of the Institute and advises the President on
scientific priorities and the research activities to keep the Institute stay on the course of theirobjectives.
■ The EAC members as of March 2010

■ New IPMU building■ Obelisk standing in the middleof Piazza Fujiwara.

J. Ellis

CERN

M. Gonokami

U of Tokyo

N. Kaifu

NAOJ

Y.K. Kim

Fermilab/U of Chicago

S. Kojima

TitechD. Morrison

UC Santa Barbara

R. Peccei

UCLA; Chair

S. Kahn

SLAC/Stanford U

13■ The University of Tokyo Kashiwa Campus

The administrative staff is an integral part of the Institute. Providing the best possible
environment to the researchers in the Institute is of essential importance for the IPMU’s mission.
This part is headed by the Administrative Director. Its function also enables the Director to spend
more time to consider the Institute at large and focus on the direction of the research.

U Tokyo President
IPMU Management
Center Director
External Advisory
Committee

Administrative
Director
IPMU Research

University of California Berkeley, Physics Department
University of Chicago, Department of Astronomy and Astrophysics
John’s Hopkins University, Department of Physics and Astronomy

Scientific Advisory
Committee

Executive Board Meeting■ Foreign Institutions with exchange program with IPMU

Institute for Advanced Study, School of Natural Sciences

Deputy Directors

Organization

Organization

IPMU has rather unique approach in organizing the research objectives, where the world’s
leading scientists in their research fields are appointed as the Principal Investigators. There are
nineteen of them at the moment and they are affiliated to IPMU and other departments in
the Host Institution (U of Tokyo) as well as other institutions. The Principal Investigators havea large autonomy in the research they conduct. They can make proposals to the Director tohire research staff at IPMU to help their research. The Director’s approval on the proposed
appointments will reflect the scientific vision and priorities set by the Director, who may consult
the SAC as needed.
IPMU tries to have close relations with similar research institutions in the world to
encourage research and educational exchanges. We have signed either agreements ormemorandum of understanding with the following institutions.

Principal Investigators
Visitors

Collaborators
Faculty, Postdocs, Students

New Mexico State University, Astronomy Department
Princeton University, Department of Astrophysical Sciences
University of Washington, Astronomy Department
Washington State University, Department of Mathematics■ IPMU’s research activities are conducted with a flat organization comprising of principal investigators
as a core, IPMU staff including junior researchers, collaborators, and visitors.

Technical University of Munich, Physics Department
Ludwig Maximilian University of Munich, Physics Department
Max Planck Institute, Astronomy and Astrophysics Department
Max Planck Institute, Extra-terrestrial Physics Department■ Host Institution (University ofTokyo)
Department of Physics
Institute for Cosmic Ray Research

Max Planck Institute, Physics Department

Graduate School of Mathematical Sciences

European Southern Observatory (ESO)(The European Organization for
Astronomical Research in the Southern Hemisphere)

Department of Astronomy

National Taiwan University, Research Center for Cosmology and Particle Astrophysics■ Collaborating Institutions
National Astronomical Observatory of Japan (NAOJ)
Yukawa Institute for Theoretical Physics, Kyoto University
Department of Physics, Kyoto University
Research Center for Neutrino Science, Tohoku University
Department of Physics, University of California Berkeley
Department of Astrophysical Sciences, Princeton University
Institut des Hautes Etudes Scientifiques (IHES)High Energy Accelerator Research Organization (KEK)15

14

Stanford University, Kavli Institute for Particle Astrophysics and Cosmology (KIPAC)

Postdoctoral Fellows

H. Murayama, Particle Theory, Cosmology

C. Bambi, Cosmology
T. Basak, Mathematics
A. Bene, Mathematics
C.R. Chen, Particle Theory
W.S. Cho, Particle Theory
D. Easson, Cosmology
J. Evans, Particle Theory
S. Galkin, Mathematics
D.F. Gao, String Theory
A. Getmanenko, Mathematics
M. Huang, String Theory
K. Izumi, Cosmology
I. Kayo, (JSPS Fellow) Astrophysics
A. Kozlov, Neutrino Physics
D. Krefl, String Theory
T.Y. Lam, Astrophysics
G. Lambard, Astroparticle Physics
W. Li, String Theory
Y.T. Lin, Astrophysics
T. Nozawa, Astronomy
D. Orlando, Mathematics
S.C. Park, Particle Theory
M. Pichot, Mathematics
S. Reffert, Mathematics
K. Shackleton, Mathematics
K. Shimizu, (JSPS Grant-in-Aid), Astrophysics
J. Shu, Particle Theory
Y. Srivastava, String Theory
M. Sudano, Particle Theory
H. Takami, Astrophysics
M. Tanaka, Astronomy
J.Y. Tang, Cosmology
M. Valdes (JSPS Fellow), Astrophysics
K. Wang, Particle Theory

Deputy Directors

16

Organization

H. Aihara, High Energy Physics, Astrophysics
Y. Suzuki, Astroparticle Physics, Neutrino Physics
Principal Investigators
H. Aihara, High Energy Physics, Astrophysics
A. Bondal, Mathematics
M. Fukugita, Astrophysics
K. Inoue, Neutrino Physics
T. Kajita, Neutrino Physics
S. Katsanevas, Astroparticle Physics
T. Kohno, Mathematics
H. Murayama, Particle Theory, Cosmology
M. Nakahata, Astroparticle Physics
M. Nojiri, Particle Theory
K. Nomoto, Astronomy
H. Ooguri, Mathematical Physics, String Theory
K. Saito, Mathematics
K. Sato, Cosmology
H. Sobel, Astroparticle Physics
D. Spergel, Astrophysics
N. Sugiyama, Cosmology
Y. Suzuki, Astroparticle Physics, Neutrino Physics
T. Yanagida, Particle Theory

Faculty Members
P. Frampton, Particle Theory
S. Hellerman, String Theory
K. Hori, String Theory
S. Kondo, Mathematics
K. Maeda, Astronomy
K. Martens, Astropharticle Physics
A. Mikhailov, Mathematical Physics
S. Mukohyama, Cosmology
H. Murayama, Particle Theory, Cosmology
K. Nomoto, Astronomy
K. Saito, Mathematics
K. Sato, Cosmology
J. Silverman, Astronomy
S. Sugimoto, String Theory
M. Takada, Cosmology
F. Takahashi, Particle Theory
T. Takayanagi, String Theory
Y. Toda, Mathematics
A. Tsuchiya, Mathematics
M. Vagins, Astroparticle Physics
T. Yanagida, Particle Theory
N. Yasuda, Astronomy
N. Yoshida, Astrophysics
T. Watari, String Theory

Graduate Students
W.L. Klemm (UC Berkeley), Particle Theory
S. Mandal (UC Berkeley), Particle Theory

Joint Appointments
K. Abe (Tokyo ICRR), Astroparticle Physics
M. Aganagic (UC Berkeley), String Theory
R. Bousso (UC Berkeley), Cosmology
P. Decowski (NIKHEF), High Energy Physics
M. Doi (U Tokyo), Astronomy
Y. Efremenko (U Tennessee), Neutrino Physics
T. Eguchi (Kyoto YITP), Field Theory
M. Endo (U Tokyo), String Theory
S. Enomoto (U Washington), Neutrino Physics
A. Ferrara (S.N.S. Pisa), Astronomy
S. Freedman (LBNL), Neutrino Physics
B. Fujikawa (LBNL), Neitrino Physics
M. Fukushima (Tokyo ICRR), Astroparticle Physics

17

Director

Staff

4. StaffLong-term Visitors (more than 1 month)
S. Blinnikov, ITEP (Russia)
I. Nisoli, Pisa (Italy)
A. Vicente, IFIC (Spain)
M. Bersten, Chile (Chile)
M. Yamaguchi, Tohoku (Japan)
L. Uruchurtu, Cambridge (UK)

B. Michel, Harvard (USA)C. S. Kim, Yonsei (Korea)
M. Verbitsky, ITEP (Russia)
B. Webber, Cambridge (UK)P. F. de Medeiros, Edinburgh (UK)D. Hernandez-Diaz, Madrid (Spain)
R. Janik, Jagiellonian (Poland)
E. Mendez-Escobar, Edinburgh (UK)Z. Bajnok, Hungarian Acad. Sci. (Hungary)
M. Pevzner, Reims (France)
C. Schmidt-Colinet, ETH-Zurich (Switzerland)
S. R. Das, Kentucky (USA)P. Hut, IAS (USA)Y. Nakayama, UC Berkeley (USA)M. Wolk, Paris 6 (France)
X. F. Wang, Tsinghua (China)
C. Weniger, DESY (Germany)
J. Schmidt, DESY (Germany)
B. Venkov, Steklov Inst (Russia)
S. T. Petcov, SISSA (Italy)
Z. Kunszt, ETH-Zurich (Switzerland)
C. Beil, UC Santa Barbara (USA)T. O'Donnell, Berkeley (USA)

Administrative Division (*section head)
Director K. Nakamura
Head S. Sugimura
Chief A. Ito
General Management and Personnel
M. Minami*, K. Oomoto, Y. Enomoto, K. Kawajiri,
M. Miura, F. Miyazoe,
T. Shiga, R. Tamura, R. Tamura
Salary and Travel Expenses
Y. Ootaka, N. Ishida, N. Kubo, H. Yoshida
International Relations
M. Ozawa*, H. Furuya, H. Kuboshima,
K. Nakamura,
M. Nishikawa, R. Ujita,
Finance Planning and Budget Control
Y. Kato*, T. Yamanaka
Contract and Purchasing
N. Abe*, H. Ezawa, S. Utsumi
Library
K. Kubota
Computer and Network
H. Tanaka, A. Tsuboi
Documentation
K. AbeKamioka Satellite
M. Nishikawa*, S. Higashi, M. Kanazawa, Y. Shimizu
Facilities
N. Watanabe

Alternative Gravity Theories
Einstein's theory of relativity unifies a3-dimensional space and a 1-dimensional time
as a spacetime and describes gravity as a fabricof 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 fromwhat we expect. For example there may be
hidden dimensions at short distances. In fact,
Credit: Creative Commons Attribution-Share Alike 2.0 Germany
many theories, including superstring theories
and M-theory, require the existence of such 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 issupposed 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 some indirect
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 short distances. Precision observational data recently revealed that the expansion of ouruniverse is accelerating. If Einstein's theory is correct, this requires that more than 70% of ouruniverse is filled with invisible, negative pressure, energy. This energy is named 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 aninvisible planet called Vulcan, a so-to-speak dark planet, to explain the anomalous behavior of
Mercury. However, as we all know, the dark 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
can change Einstein's theory at long distances to address the mystery of dark energy.
■ Alternative Gravity Theories Group
MemberMain Interest

Cosimo Bambi

General Relativity is our current and successful theory of gravity, but it has been tested
essentially only in the perturbative and weak field limit. The challenge is to figure out if
its predictions are still reliable in other contexts, such as the description of the universeor black hole physics.

Damien Easson

Alternatives to dark energy to explain the acceleration of the Universe. Constraining
gravitational models using observational data and theoretical considerations.

Shinji Mukohyama

Brane world scenarios and the Higgs phase of gravity.

Seong Chan Park

Study of various approaches.

Naoshi Sugiyama

Testing alternative gravity theories using observational data.

Atsushi Taruya

Modeling and testing structure formation scenario in modified theories of gravity fromlarge-scale structure data.

Jun'ichi Yokoyama

Model building and constraints on dark energy.

Research Program

K. Hagiwara (KEK), Particle Theory
L. Hall (UC Berkeley), Particle Theory
K. Hamaguchi (U Tokyo), Particle Theory
Y. Hayato (Tokyo ICRR), Neutrino Physics
M. Hazumi (KEK), Astrophysics
K. Heeger (Wisconsin), Neutrino Physics
R. Hirschi (U Keele), Astronomy
J. Hisano (Tokyo ICRR), Particle Theory
P. Horava (UC Berkeley), String Theory
G. Horton-Smith (U Kansas), Neutrino Physics
S. Hosono (U Tokyo), Mathematical Physics
K. Izawa (Kyoto YITP), Particle Theory
K. Kaneyuki (Tokyo ICRR), Neutrino Physics
M. Kashiwara (Kyoto U), Mathematics
A. Kato (U Tokyo), Mathematical Physics
M. Kawasaki (Tokyo ICRR), Cosmology
E. Kearns (Boston U), Neutrino Physics
C. Kobayashi (Australia), Astronomy
T. Kobayashi (U Tokyo), Mathematics
M. Koga (Tohoku U), Neutrino Physics
E. Komatsu (U Texas), Cosmology
Y. Koshio (Tokyo ICRR), Neutrino Physics
T. Kubota (Osaka U), String Theory
A. Kusenko (UCLA), Particle Theory, Astrophysics
M. Limongi (INAF Rome), Astronomy
S. Moriyama (Tokyo ICRR), Neutrino Physics
T. Moroi (Tohoku U), Particle Theory
K. Nakamura (Tohoku U), Neutrino Physics
T. Nakaya (Kyoto U), High Energy Physics
Y. Nomura (UC Berkeley), Particle Theory
S.T. Petkov (SISSA), Particle Theory
A. Piepke (U Alabama), Neutrino Physics
Y. Saito (U Tokyo), Mathematics
K. Scholberg (Duke U), Neutrino Physics
H. Sekiya (Tokyo ICRR), Neutrino Physics
M. Shiozawa (Tokyo ICRR), Neutrino Physics
M. Smy (UC Irvine), Neutrino Physics
J. Stone (Boston U), High Energy Physics
Y. Takeuchi (Tokyo ICRR), Neutrino Physics
A. Taruya (Tokyo RESCEU ), Astrophysics
N. Tominaga (Konan U), Astrophysics
E.L. Turner (Princeton U), Astrophysics
C.W. Walter (Duke U), Neutrino Physics
J. Yokoyama (Tokyo RESCEU), Astrophysics
K. Yoshikawa (U Tokyo), Mathematics

19

18

Staff

5. Research Program

IPMU collider phenomenology groupmembers pursue a broad range of researchin testing physics of the Standard Modeland beyond the Standard Model at thecolliders, especially the CERN Large Hadron
Collider(LHC). With the LHC turn-on in 2009,
we have great opportunities in exploring
physics at the TeV scale. This machine
enables us to systematically investigate
electroweak symmetry breaking, to probe
new physics like low energy supersymmetry,extra dimensions or other unexpected exotics.
Researchers in the group are now preparing
the theoretical tools to investigate these
exciting physics. We also seek the connection
between collider physics and dark matter/cosmic ray physics.

As more massive cosmological data
sets are being available, statistics andmore sophisticated statistical methods are
becoming increasingly important in order
to extract cosmological information fromsuch data sets as well as deal with large andcomplex data sets. The relevant issues thatare actively discussed in this field are model
selection, parameter estimation methods,
Bayes' theorem and so on.
One of researches we are carryingout at IPMU is gravitational lensing, tiny
distortion of distant galaxy images caused bygravitational lensing due to their foregroundlarge-scale structures of the Universe. To extract the tiny distortion signal from observed galaxy
images, galaxy shapes need to be modeled in a mathematically rigorous manner and be
precisely disentangled from observational effects of sampling, convolution and noise. Statistical
tools/knowledges mentioned above sometimes help study these shape measurement issues.
Thus we are actively working on these cosmology-statistics issues by inviting and/orinteracting with world-class leading cosmologists and statisticians.

■ Collider Phenomenology Group
Main Interest

Chuan-Ren Chen

Collider phenomenology of the Standard Model (SM) and Models Beyond the Standard
Model (BSM).

Won Sang Cho

New physics search/discrimination, mass/spin measurements of new particles, and CP
violation at the LHC.

Motoi Endo

Supersymmetric models, including collider phenomenology and particle cosmology.

Koichi Hamaguchi

BSM, in particular, SUSY models, their LHC phenomenology and application tocosmology (baryogenesis, BBN constraints, dark matter and its signatures).

Junji Hisano

Flavor physics and collider physics of BSM.

William Klemm

How to discover BSM and distinguish from one another at collider. Determination of
spins of new particles.

Sourav Mandal

Models beyond the Standard Model, and their signatures in astrophysics,cosmic rays
and colliders.

Hitoshi Murayama

Determination of spin and mass of BSM particles.

Mihoko Nojiri

New physics searches and measurements at LHC

Seong Chan Park

Search for BSM, in particular, extra dimensions and black holes at the LHC. Search for
golden channel for finding black holes at the LHC. MC generator for black hole events(BlackMax).

Jing Shu

Physics of top, Z', and higgs.

Kai Wang

Search for BSM and test of SM at the LHC.

Tsutomu Yanagida

Finding theories beyond the Standard Model.Theories for strongly interacting
gauge mediation and possible explanations on the anomalies observed in PAMELA
experiments of cosmic rays.

20

MemberResearch Program

Cosmology and Statistics

21

Research Program

Collider PhenomenologyWe know that about 23% of the totalenergy and matter of the Universe is dark
matter, but we do not know what that is
made of. The aim of the dark matter searchexperiment, XMASS, is to directly observe
interactions of the cold dark matter in thelarge detector placed underground andto reveal the character of dark matter -- its
interactions, mass and so on.
We use 1 ton liquid Xenon detector
cooled down at the temperature of -100
degree Celsius and measure the scintillation
light emanated from the interaction of the dark Matter in the detector. The experimental
sensitivity is about 2 orders of magnitude better than the current best limit. We will soon step into the discovery region.
In 2008, an underground cavity to house the experiment was completed and following
that, the 10m high cylindrical water tank which contains 800 tons of water to shield gamma
rays and neutrons from nearby rocks was constructed. The major parts of the detector wasassembled during the summer and autumn in 2009, and we are in the middle of final tuning of
the detector and data handling system.

Experimental physics and observational
astronomy rely on cutting-edge technologies
to build detectors that push the frontier ofknowledge with the data they deliver. Datais the lifeblood of science, as the scientificmethod demands that every insight be tested
against the hard evidence of experimental
data. The art of experimentation is toprovide both reliable and pertinent data totest the theories that the disciplined use ofknowledge and imagination conjure fromthe massive body of scientific data already ■ EGADS Project (Evaluating Gadolinium’s Action on
Detector Systems), which is now under construction inaccumulated.
the Kamioka mine, will be used to establish the viability
Active detector development provides of gadolinium-enhanced water Cherenkov detector forthe means to extend the reach of current detecting supernova relic neutrinos.
and future experiments - and very possibly
new technology that may well find its way back into your living room or workshop. It is a vital
ingredient in our quest to understand the Universe. The projects below are as diverse as the
problems encountered and the individuals working on them.

Research Program■ Detector Development Group23

Research Program

Detector Developments

22

Dark Matter Experiment■ Dark Matter Experiment Group

MemberMain Interest

Karsten Heeger

Liquids scintillator, water Cherenkov, and bolometric detectors. Ultra-low backgrounddetectors and techniques.

MemberMain Interest

Karsten Heeger

Direct dark matter searches in low-energy experiments.

Jing Liu

Direct Dark Matter search using the XMASS detector.

Kunio Inoue

Neutrino oscillation, neutrino geophysics, neutrino astrophysics, neutrinoless double
beta decay, and directional measurement of anti-neutrinos.

Kai Martens

Identification of particle candidates for Dark Matter. Super low background experiments.

Kai Martens

Continuous removal of radon from liquid xenon.

Shigetaka Moriyama

Direct detection of Dark Matter.

Masayuki Nakahata

Purification of Xenon for low background experiments.

Yasuo Takeuchi

Development of high sensitivity radon detectors in air, in water, and in xenon.
Development of impurity measurement systems in xenon.

Yoichiro Suzuki

Discovery of Dark Matter.

Mark Vagins

Improving the neutrino response of water Cherenkov detectors.

Yasuo Takeuchi

Dark Matter search at XMASS.

■ Scanning Electron Microscope pictures taken at the IPMU Kamioka Satellite.
The pictures show copper dendrites that were grown for their sharp tips to use fieldemission to inject currents to clean up liquid noble gases like Xenon and Argon.

Member

Main Interest

Cosimo Bambi

General Relativity is our current and successful theory of gravity, but it has been tested
essentially only in the perturbative and weak field limit. The challenge is to figure out if
its predictions are still reliable in other contexts, such as the description of the universeor black hole physics.

Damien Easson

Building concrete models of infation from string theory. Observable predictions of
non-standard infationary theories.

Motoi Endo

Supersymmetric models, including collider phenomenology and particle cosmology.

Koichi Hamaguchi

BSM, in particular, SUSY models, their LHC phenomenology and application tocosmology (baryogenesis, BBN constraints, dark matter and its signatures).

Minxing Huang

Non-Gaussianities in the Cosmic Microwave Background from inflation models.

Ken-iti Izawa

Gauge/gravity-mediated supersymmetry breaking, supersymmetric inflation, unitedmodels.

Takeshi Kobayashi

Cosmology of the early universe through string theory.

Alexander Kusenko

Dark matter, baryogenesis, phase transitions.

Shinji Mukohyama

Inflation and brane cosmology.

Hitoshi Murayama

Leptogenesis. Models of inflation.

Seong Chan Park

Two different types of infation models, the orbifold GUT inflation and the theory withf (φ) R term, so called the nonminimal coupling term. The (p) reheating of the inflation
theory with the non-minimal coupling term.

Naoshi Sugiyama

Setting constraints on the inflation models and early universe phenomena such as bigbang nucleosynthesis by using observational data.

Fuminobu Takahashi

Mechanism of inflation and subsequent reheating processes. Origin of density
perturbations and non-Gaussianity. Baryogenesis. Big Bang nucleosynthesis.

Atsushi Taruya

Probing the early epoch of the Universe through direct and indirect measurementsof the stochastic background of gravitational waves via laser interferometers or
observations of CMB anisotropies.

Tsutomu Yanagida

Finding theories beyond the standard model.Theories for strongly interacting gauge
mediation and possible explanations on the anomalies observed in PAMELA
experiments of cosmic rays.

Jun'ichi Yokoyama

Inflation models. Generation of fluctuations. Stochastic inflation.

Research Program

The Universe is expanding; the further
away a galaxy is, the faster it is moving,which is known as the Hubble's law. Thisobservational fact implies that, if we go backin time, the Universe was small, dense andextremely hot. The evolution of the early
universe is described by the FriedmannLemaitre-Robertson-Walker (FLRW) universe,a homogeneous and isotropic solution
Credit: NASA/WMAP Science Teamof the Einstein equations of the generalrelativity, 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 for the standard big bang theory. Those three observations still remain important
probes of the early Universe.
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 introducing an inflationary expansion at the very early stage of the
Universe. What is more important about inflation is that quantum fluctuations of a scalar field
driving the inflation (called an inflaton) generate tiny density perturbations, which can accountfor the seed of the structures such as galaxies and clusters of the galaxies seen in the current
Universe. The properties of the density perturbations depend on the inflation models, which
can be probed by studying tiny inhomogeneities in the CMB temperature anisotropy.
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 hassignificantly increased. Nevertheless it is not fully known how the inflation occurred, how theuniverse was reheated after inflation, how the dark matter as well as the baryon asymmetry
were created, whether there is large non-Gaussianity in the density perturbations or not, andso on. We would like to tackle those questions in order to reveal how the universe evolved fromthe inflationary epoch into what it looks like at present.

■ Inflation and Early Universe Group

25

24

Research Program

Inflation and Early Universe

Geometry:
Geometric objects we study in mathematics include several kinds of spaces, such as
topological spaces, differentiable manifolds, symplectic manifolds, complex manifolds andalgebraic varieties. Recently these various branches of geometries are deeply connected andinfluence each other. For instance, mirror symmetry is a conjectural duality between symplectic
manifolds and algebraic varieties, which was found by the duality between different types ofstring theories. One of the research focus of our geometry group is to invent and investigate
the mathematical notions which describe the mirror symmetry, and give some applications to
the geometric problems we are interested in.
In the theory of mirror symmetry, a Calabi-Yau 3-fold plays an important role. A CalabiYau 3-fold is a complex manifold of real dimension 6 with a Ricci flat metric. In string theory,the spacetime is expected to be 10-dimensional, and the extra 6-dimensional space is expected
to take the form of a Calabi-Yau 3-fold. On a Calabi-Yau 3-fold, we can define the quantum
invariant counting Riemann surfaces on it, called Gromov-Witten(GW) invariant. One of the

Research Program

In the 17th century, Newton found differential and integral calculus, giving a language
and method to describe the law of dynamics in nature. This is a good example of mathematics
providing the scientific community, and sometimes society in general, with a common
language and method 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.
Gauge theory, quantum field theory, general relativity, superstring theory and thetheory of integrable systems in physics have provided major influences in the development ofmathematics such as algebraic geometry, differential geometry, topology, representation theory,
algebraic analysis and number theory. A large scale development has been newly emerging.
This close collaboration between mathematics and physics is particularly important
for advancing the study of the concept of space and universe that have been developed byscientists such as Kepler, Newton, Gauss, Riemann, Maxwell, Einstein and many others.
For the past twenty years, methods of quantum field theory have had a major influenceon mathematics. Since quantum field theory treats the differential and integral calculus of an
infinite number of degrees of freedom, the rigorous development of quantum field theory inmathematics has yet to be established. Nevertheless, in these twenty years, a lot of concepts
arising from quantum field theory such as quantum groups have had a major influence on
modern mathematics and physics.
Mathematicians at IPMU
are working to develop modern
mathematics by closely working
with physicists. The following are
the fields of mathematics studied
at IPMU. We divided the fields into
geometry and algebra.

ways to describe the mirror symmetry is to establish the relationship between GW-invariants andthe period map on the mirror manifold. In our group, S. Galkin studies GW-invariant, K. Saito
studies the period map, and they develop these theories.
Another way to describe the mirror symmetry is to use the homological algebra proposedby M. Kontsevich. It is stated as an equivalence of triangulated categories between derived
category of coherent sheaves and derived Fukaya category on the mirror manifold. In ourgroup, A. Bondal develops the theory of triangulated categories, and describes the structure ofseveral triangulated categories, e.g. to show the existence of the exceptional collections. The
development of this theory is relevant in understanding the mirror symmetry.
On a Calabi-Yau 3-fold, we can define another quantum invariant, called DonaldsonThomas(DT) invariant. It counts D-branes in terms of string theory, and is expected to beequivalent to the GW-invariant (GW/DT correspondence). The DT-theory depends on a choiceof a stability condition on the derived category, and the set of stability conditions form acomplex manifold, which is expected to be a stringy Kahler moduli space. Understanding DTinvariants and the structure of the space of stability conditions is important in connection withstring theory, and Y. Toda studies these theories. Also the theory of quantum invariants of low
dimensional manifolds has begun with the study of quantum theory such as integrable systems,
soliton equations and the conformal field theory. These quantum invariants turn out to have a
deep connection with GW-theory, and T. Kohno studies these invariants.

Algebra:Algebra is a collection of branches of mathematics, which studies the system of numbers
such as integers and polynomials. Some examples of the branches are set theory, group theory,(commutative) ring theory,(algebraic) number theory, category theory, algebraic geometry,combinatorics and representation theory. Of course, each branch may not be fully contained inalgebra, and may lie in between geometry.
Algebra studied at IPMU includes homological algebra and category theory. Homologicalalgebra began as a study of homology groups of topological spaces. K-theory is an example
of cohomology theories. Recall that in connection with string theory, an interesting andbasic example is that an element of a K-group of a certain topological space has a physicalinterpretation. This enables us to use the powerful machinery of homological algebra to thestudy of string theory.
Nowadays, a basic algebraic invariant associated with a geometric object is a triangulated
category. For example, this appears from an algebraic variety as the derived categoryof coherent sheaves. The notion of triangulated category is so abstract that they appear
everywhere in mathematics. We know that some non-commutative geometry is better describedin this language. Recent research is focused on finding a more complicated structure than thatof a triangulated category. DG-categories and model categories are examples of objects thatare equipped with more structure than a triangulated category. We seek to reveal the algebraic
structure common to various phenomena (which may or may not look unrelated) occurring inmathematics and physics.
Another basic example of an algebraic structure is a group or a group action. A group
describes the symmetry of things. Groups are everywhere in mathematics from Galois groups in

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26

Research Program

Mathematics

Member

Main Interest

Alex Bene

Mapping class groups of surfaces, their representations, and their relations to
3-manifolds, with a primary focus on the combinatorial description of these groups interms of fatgraphs.

Sergey Galkin

Fano varieties, their classification, degenerations, Gromov-Witten invariants, mirror
dual Landau-Ginzburg models.

Alexander Getmanenko

Comlpex analytic methods for differential equations, with an application towards Witten
Morse theory and the Fukaya category.

Kentaro Hori

Mirror symmetry as a bridge between symplectice geometry and complex geometry,
real algebraic geometry, homological algebra, and their application to string theory.

Shinobu Hosono

Mirror symmetry of Calabi-Yau manifolds, and its applications to Gromov-Witten theory.

Toshiyuki Kobayashi

Discontinous groups for homogeneous manifolds preserving indefinite-Riemannian
structure, rigidity and deformation of discontinuous groups, and spectrum on locallyindefinite-Riemannian symmetric spaces. Synthetic and systemetic study of multiplicityfrree representations by the original idea of "visible actions" on complex manifods.

Toshitake Kohno

Construction of topological invariants for braids, knots and 3 dimensional manifold
based on quantum groups and conformal field theory. Algebraic structures of thehomology of the loop spaces of configuration spaces.

Hirosi Ooguri

Application of new mathematical techniques emerging at the interface of string theory
and geometry to solve mysteries of quantum gravity.

Susanne Reffert

Calabi-Yau geometries in the framework of String compactifications.

Kyoji Saito

Construction of primitive forms and associated period maps by use of infinite
dimensional Lie algebras (e.g. elliptic algebras and cuspidal algebras) and theirrepresentation theory. Partition functions of Ising models on (non-commutative)
discrete groups and monoids.

Yoshihisa Saito

Representation theory of infinite dimensional Lie algebras and quantum groups,
especially in geometric approach to these subjects. Areas around these subjects suchas integrable systems, combinatrics, finite dimensional algebras, algebraic groups,
Hecke algebras and D-modules.

Ken Shackleton

Large-scale geometry of groups (eg. mapping class groups), in the sense of Gromov
combinatorial rigidity in families of groups hyperbolic and relatively hyperbolic groups.

Yukinobu Toda

Derived categories of coherent sheaves on algebraic varieties and the theory ofstability conditions on them. It is motivated by several backgrounds, such as minimalmodel theory or homological mirror symmetry. Construction of generalized DonaldsonThomas type invariants, counting semistable objects in the derived category.

Mikael Pichot

Nonpositively curved geometry and geometric group theory (especially CAT(0)and
hyperbolic). Foliation theory and topological dynamical systems.

Akihiro Tsuchiya

Conformal field theory based on representation theory of infinite dimensional algebra
and the theory of D-modules.

Research Program■ Mathematics Group (Geometry)

29

Research Program
28

number theory to mapping class groups in topology. Study of groups, or representation theory,
will then lead to the explanation of the phenomena caused by the symmetry. Let us give alist of those groups (or algebras) our researchers are interested in, just to give an idea on how
diverse we are. The groups (or algebras) that appear are vertex operator algebras, Lie groups(algebras), braid groups, Galois groups, and mapping class groups. We refer to the table below
of group members for more information on how each deals with the group in his research.
We certainly hope to go the other direction. An example question would be if the
product structure in K-theory has an interpretation. We can ask if it has a physical interpretation.
The ``distance'' of algebra from physics, compared with geometry, is greater, in the sense thatmany of the problems in physics are first stated using (quantum) field theory. While geometry isused to describe the universe rather directly as if taking a picture, algebra tends to seek for theexact laws behind the phenomena. One basic example of an algebraic structure is a group or agroup action. Groups are everywhere in mathematics from Galois groups in number theory to
mapping class groups in topology. A group describes the symmetry of things. Study of groups,
or representation theory, will then lead to the explanation of the phenomena caused by thesymmetry.

Tathagata BasakThe crossroads of representation theory, geometry and number theory. New
connection between the monster simple group and a thirteen dimensional complex
hyperbolic orbifold coming from the automorphism group of a hermitian lattice. This
leads to study of fundamental groups of hyperplane complements and uniformizationsof locally symmetric varieties by automorphic forms.

Sergey Galkin

Arithmetics of Landau-Ginzburg models, cluster categories, derived categories.

Satoshi Kondo

Arithmetic geometry. Use of tools from algebraic geometry to study problems in number
theory.

Mikael Pichot

Bruhat-Tits buildings. Group theory and group algebras. K-theory, the Baum--Connes
conjecture and the property of rapid decay. Noncommutative geometry.

Kyoji Saito

Construction of primitive forms and associated period maps by use of infinite
dimensional Lie algebras (e.g. elliptic algebras and cuspidal algebras) and theirrepresentation theory. Partition functions of Ising models on (non-commutative)
discrete groups and monoids.

Akihiro Tsuchiya

Conformal field theory based on representation theory of infinite dimensional algebra
and the theory of D-modules.

Toshiyuki Kobayashi

1.Discretely decomposable branching laws of the restriction of infinite dimensional
representations of reductive groups, and its application to modular varieties.2. Minimal
representations are buiding blocks of unitary representations. Focus on geometricanalysis on minimal representations, in particular, construction of generalized Fouriertransforms.

Hirosi Ooguri

Conformal field theories in diverse dimensions that are relevant to dynamics of stringsand branes in superstring theory. Application of conformal field theory techniques tostudy the landscape of string vacua.

Domenico Orlando

Spin chains (XXZ model and related two-dimensional lattices) in connection to dimer
models and topological strings.

Susanne Reffert(Quantum) dimer models. (Quantum) crystal melting and spin chains.

Yoshihisa Saito

Representation theory of infinite dimensional Lie algebras and quantum groups,
especially in geometric approach to these subjects. Study of the area around thesesubjects, for example, integrable systems, combinatrics, finite dimensional algebras,
algebraic groups, Hecke algebras and D-modules.

Kenneth J. Shackleton

Geometric group theory. Hyperbolic and relatively hyperbolic groups. Low-dimensional
topology. Teichm"uller theory and mapping class groups. Curve complexes, pants
complexes.

Models Beyond the Standard Model
Up to now, we have seen that aquantum field theory with quarks, leptons
and vector bosons for three different forces
describes reasonably well all the experimental
data available so far. Among the vectorbosons, however, those corresponding to
the weak force (which is responsible for theβ -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 a whole. From theconsistency of quantum field theories, it is
known that something must be behind thenon-zero masses of these vector bosons. It
has not been confirmed experimentally yet
how these masses are generated.
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 fromcondensation 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 in experiments 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.
•

The Higgs boson is the only scalar field in the Standard Model; all other dynamical
degrees of freedom in the Standard Model are either fermions or vector fields.
Why does the Standard Model has one scalar field, and just one? Why does its
condensation develop?

•

The Newton constant G N 〜 6.7 × 10-11m3kg/s2 corresponds to an energy scale
1/√G N ℏ /c 3 〜 1019 GeV. Why is there a huge hierarchy of order 1017 between thisenergy scale and the weak boson masses of order 102 GeV, and how can the weakboson 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 models, we can examine whether such models arereally 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 origin of the masses of the weak bosons is not the only puzzle of the Standard

Research Program

Main Interest

31

Member30

Research Program■ Mathematics Group (Algebra)

For non-experts

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

MemberMain Interest

Chuan-Ren Chen

Collider phenomenology of the Standard Model and models beyond the Standard
Model, including SUSY and Little Higgs models. Interplay between the LHC
phenomenology and cosmology.

Won Sang Cho

Supersymmetry/Extra Dimension models, and their collider and dark matterphenomenology.

Damien Easson

Physics beyond the Standard Model to explain the origin of the dark components of the
Universe.

Motoi Endo

Supersymmetric models including collider phenomenology and particle cosmology.

Paul Frampton

Model building. Chiral color.

Koichi Hamaguchi

SUSY models and their LHC phenomenology and application to cosmology(baryogenesis, BBN constraints, dark matter and its signatures).

Junji HisanoSupersymmetric models. Search for clues in accelerator and non-accelerator physics.
Construction of realistic models at TeV and at GUT scales.

Ken-iti Izawa

Gauge/gravity-mediated supersymmetry breaking. Supersymmetric inflation. Unitedmodels.

William Klemm

Signatures from various beyond the standard models. Distinguishing from one anotherat a collider. Determination of spins of new particles.

Sourav Mandal

Models beyond the Standard Model, and their signatures in astrophysics, cosmic rays
and colliders.

Hitoshi Murayama

Supersymmetry breaking models and phenomenology.

Hirosi Ooguri

General constraints on low energy effective theories that arise from superstring
theory or any other consistent theory of quantum gravity. Supersymmetry breaking
mechanisms in gauge theories and superstring theory.

Seong Chan Park

Various ideas of the BSM: warped extra dimension, model of EWSB in the context ofGauge-Higgs unification, orbifold GUT, little Higgs etc.

Vikram Rentala

Spin determination using quantum interference at the LHC.

Jing Shu

Warped extra dimension models. Strongly coupled theory.

Matt Sudano

Dynamical supersymmetry breaking and its mediation.

Fuminobu Takahashi

Supersymmetry. Link between supersymmetric models and cosmology, such as SUSY
breaking, dark matter, and SUSY inflation models.

Kai Wang

Model building of BSM physics, in particular SUSY models as well as neutrino models.
Their collider tests at the CERN LHC.

Taizan Watari

Model building and phenomenology beyond the Standard Model in general.
SUSY breaking and mediation, flavor pattern, GUT, inflation, Peccei-Quinn axion,
quintessence, landscapes.

Tsutomu Yanagida

PAMELA and ATIC data searching for a convincing model that explains the observed
anomalies.

Research Program■ Models Beyond the Standard Model Group33

Research Program
32

Model. It is known that huge 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 theseissues.
Recent reports of excess in high-energy cosmic ray fluxes, deviation from the StandardModel 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 theoretical models that account for these
phenomena.
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?
The thermal history of early universe is described very well by the Standard Model at least
back to the era with the temperature of order MeV, but it is only with several input parametervalues of initial condition of the universe. Those initial condition parameters include baryon
asymmetry, normalization of density contrast and the 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.

Research Program

What are the building blocks ofnature? Most people have heard of electrons,
which are indeed (as far as we can tell)fundamental particles, as well as protons andneutrons, 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 mostmysterious of these are the neutrinos.
The Standard Model of particle physics
contains three generations of fundamental
particles. In each of these generations, orfamilies, 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 firstgeneration lepton is called the electron neutrino, which is electrically neutral. The second
generation contains two more types of quarks, a charged lepton called the muon, and themuon neutrino, while the third family contains a final pair of quarks, a charged lepton called
the tau, and a tau neutrino.
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 be very big, very sensitive, or both. At IPMU we haveteams of researchers working on some of the best and most famous neutrino detectors in theworld.
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 made the stunning discovery that different types ofneutrinos 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 indicatingthat 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 the ultrapure 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 streamof neutrinos from distant supernovas.
The KamLAND neutrino detector is located in the same ancient zinc mine as SuperKamiokande, but instead of water it is filled with 1,000 tons of liquid scintillator. This makes itvery 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 toobserve disappearance of reactor neutrinos, which matched other experiments' solar neutrino
data in spectacular fashion. After lowering the energy threshold at which their data could beanalyzed, 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 producedby the Beryllium-7 reaction in the Sun, as well as transforming the KamLAND detector into ahuge 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 them within the Earth, upon the Earth, above the Earth, within the Sun, andinside exploding stars, IPMU researchers are using these tiniest of particles to probe the mostinaccessible places and farthest reaches of the universe itself.
■ Neutrino Physics Group
MemberMain Interest

Karsten Heeger

Neutrino oscillation experiments with reactor neutrinos. Search for neutrinoless double
beta decay.

Glenn Horton-Smith

KamLAND experiment. Neutrino oscillation.

Kunio Inoue

Neutrino oscillation. Neutrino geophysics. Neutrino astrophysics. Neutrinoless double
beta decay. Directional measurement of anti-neutrinos.

Takaaki Kajita

Atmospheric neutrino. Long baseline experiments. Neutrino oscillations.

Alexander Kusenko

Supernova neutrinos, sterile neutrinos.

Kai Martens

Super-Kamiokande experiment for detecting neutrinos from galactic supernova (type II)
explosion.

Sourav Mandal

Models beyond the Standard Model, and their signatures in astrophysics, cosmic rays
and colliders.

Hitoshi Murayama

Neutrino oscillation phenomenology. KamLAND.

Masayuki Nakahata

Boron-8 solar neutrino measurement by Super-Kamiokande detector. Precise
measurement of the energy spectrum for the confirmation of matter effect of theneutrino oscillation.

Jan Schuemann

Improving the Super-Kamiokande detector by introducing Gadolinium. Detection ofneutrinos from distant supernovae.

Henry W. Sobel

Super-Kamiokande and T2K experiments. Neutrino physics. Supernova. Proton decay.

Yoichiro Suzuki

Experimental study on neutrino oscillations by using extra-terrestrial neutrinos and also
by using man-made neutrinos. Double beta decay experiments.

Yasuo Takeuchi

Low-energy neutrino observations in Super-Kamiokande.

Mark Vagins

Measurements of neutrinos and antineutrinos from supernovae, the sun, and nuclear
power reactors. T2K experiment. GADZOOKS experiment.

35

34

Research Program

Neutrino Physics

Weak gravitational lensing:
The path of light ray emitted by a distant galaxy is bent by gravitational force ofintervening 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 cosmological distance scales, thelensing strengths depend on the cosmic expansion history that is sensitive to the nature of darkenergy. Thus weak lensing based observables offer a powerful way for studying the natureof invisible components, dark matter and dark energy. We are carrying out observational andtheoretical studies of weak lensing phenomena using our own Subaru data sets as well as
simulations of large-scale structure.

Hyper Suprime Camera (HSC):The HSC, currently under construction, is the project to replace the prime focus cameraof Subaru Telescope with a new camera that has wider field-of-view than the current one by afactor 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 redshifts ofa few. In fact these data sets will provide us an ideal data sets for exploring the nature of dark

Sloan Digital Sky Survey III:Over the next six years (2008-2014), the SDSSIII will exploit the unique wide-field
spectroscopic capability of the Apache Point Observatory's 2.5-meter telescope, extending
the previous SDSS surveys to a deeper universe with the improved spectrograph. We, IPMU
members, are involved in SDSSIII and can freely access to the data sets before the publicdata release. In particular, one of the planned surveys, the Baryon Oscillation Spectroscopic
Survey (BOSS)will map the spatial distribution of luminous galaxies and quasars to detect thecharacteristic scale imprinted by baryon acoustic oscillations in the early universe. Using theacoustic scale as a standard ruler, we can infer the angular diameter distance to the galaxy
redshift, thereby enabling to test the models of dark energy. We are planning to develop an
optimal method for measuring properties of galaxy clustering in order to obtain unbiased
estimates on the acoustic scale as well as on cosmological parameters.

Research Program

Understanding the nature and originof large-scale structure in the Universeis one of most compelling issues inobservational cosmology. The currently mostconventional 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 toform the present-day hierarchical structures.
T h e re f o re re v e a l i n g d i s t r i b u t i o n a n damount of CDM is crucial to understanding
the formation of large-scale structure. In
addition the presence of dark energy drives
the accelerating cosmic expansion, andtherefore affects the growth of structureformation. The dark matter distribution andthe nature of dark energy can be explored from massive galaxy surveys. We have worked on
measurements from current surveys and are actively involved in the planning and design ofthe future survey with Subaru Telescope, 8.2 meter optical-infrared telescope at the summit of
Mauna Kea (4,200m), Hawaii.

matter and dark energy via measurements of cosmological observables available from thedata, weak lensing and galaxy clustering statistics. We, IPMU members, are actively involvedin this HSC project, and working on the designing and planning of HSC galaxy survey anddevelopment of data analysis pipeline.

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Research Program

Observational Cosmology

Main Interest

Yen-Ting Lin

Formation and evolution of galaxies. Roles of galactic mergers and feedback fromsupermassive blackholes on the formation of giant galaxies. Data analysis of BOSS
survey and radio surveys to elucidate the phenomenon of radio-loud active galactic
nuclei. Evolutionary connections between galaxies at z=0 and z=1 using future HSC
data.

Issha Kayo

Extraction of cosmological information from the large-scale structure of the Universe,
particularly using the data from Sloan Digital Sky Survey and N-body simulations.
Construction of a homogeneous catalog of gravitationally lensed quasars to constrain
the dark energy.

Tsz Yan Lam

Galaxy surveys to constrain cosmological models. Large-scale structure probes ofprimordial non-Gaussianity.

Keiichi Maeda

Supernova cosmology, especially in the evaluation of applicability of Type Ia
supernovae as cosmological distance indicators.

Takaya Nozawa

Evolution of dust throughout the cosmic history. Evaluation of the impacts of dust on
the observational cosmology using Type Ia supernovae as a standard candle.

Jan Schuemann

Study of neutrino fluxes and their origin using Super-Kamiokande. Improving theSuper-Kamiokande by adding Gadolinium.

John Silverman

Evolution of galaxies and supermassive black holes. Large optical/near-infrared
spectroscopic surveys of galaxies in deep fields such as COSMOS and the Chandra
Deep Field South. X-ray observations of Active Galactic Nuclei up to high redshift andin nearby galaxy groups.

Naoshi Sugiyama

Investigation of the Cosmic Microwave Background. Testing of dark energy models
using observational data such as the baryon acoustic oscillation and gravitational
lensing.

Masahiro Takada

Observational and theoretical studies of gravitational lensing caused by hierarchicalstructures of the universe. Nature of dark side of the universe, dark matter and darkenergy, with the gravitational lensing observables. Future Subaru Weak Lensing
Survey.

Masaomi Tanaka

Supernova cosmology. Observations and modelling of nearby Type Ia supernovae tounderstand the origin of their diverse properties.

Masayuki Tanaka

Observational studies of the formation and evolution of galaxies and large-scale
structures using data from the Sloan Digital Sky Survey, Subaru telescope, and Very
Large Telescope.

Atsushi Taruya

Modeling dynamics and statistics of large-scale structure of the Universe, and testing
various cosmological scenarios and/or hypothesis through direct comparison between
theory and observations. A pursuit of the prospects for future observations suchas HSC and BOSS to constrain dark energy, massive neutrinos, primordial nonGaussianity as well as to test theory of gravity.

Jun'ichi Yokoyama

Analysis of CMB anisotropy.

Naoki Yoshida

Large galaxy surveys and weak lensing observations. Computer simulations togenerate a large number of mock catalogues for future observational programs.

Particle Astrophysics
There are various kinds of highenergy phenomena in the galaxy andthe universe, from which we can gain
insight into particle physics. In a sense
the universe is a laboratory where we
can test high-energy theory; it has
a great advantage over accelerator
experiments in that the typical energy
scale can be much higher than thepresently attainable energy scale. Most
importantly, we can search extremely
weakly interacting particles, which
is difficult to do with ground-based
Credit: X-ray: NASA/CXC/CfA/M.Markevitch et al.; Optical: NASA/STScI;
experiments. These particles include Magellan/U.Arizona/D.Clowe et al.; Lensing Map: NASA/STScI; ESO WFI;
Magellan/U.Arizona/D.Clowe et al.
dark matter particle and axion.
We are working on the following topics to look for observational evidence of underlying
fundamental physics and its implication for cosmology.

Research Program

MemberParticle dark matter models and phenomenology:
The existence of dark matter has been firmly established by observation. However it
is not known yet what makes up the dark matter, and the question remains a big mystery incosmology as well as particle physics.
Dark matter could annihilate or decay, producing high-energy particles. Those energetic
particles contribute to high-energy cosmic rays, which may be observed as an excess overastrophysical background. In particular, dark matter annihilation rate is enhanced where thedark matter density is high: e.g. the Galactic Center, dwarf spheroidal galaxies, substructures in
the Milky Way halo, and the early universe.
The measurements of cosmic-rays from these regions therefore may detect the dark
matter signature. Recently a steep rise in the cosmic-ray positron fraction was observed by the
PAMELA satellite, and many dark matter models were proposed to explain the excess. Although
the interpretation of the PAMELA anomaly is still under debate, this may already be telling us ahint of what makes up the dark mater.

Axion and astrophysics:
The axion was originally proposed by Peccei and Quinn in 1977 as a solution to thestrong CP problem in the quantum chromodynamics(QCD). The axion has couplings to thestandard model particles, but they must be weak enough, since otherwise the evolution of themain sequence stars or the supernovae cooling argument would be significantly modified. Dueto its extremely weak interactions, the axion is very light, and therefore stable in a cosmologicaltime scale. In fact, the axion is one of the candidates for cold dark matter.
The axion plays an important role in cosmology and astrophysics. If dark matter consists

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Research Program■ Observational Cosmology GroupIn 1930 Wolfgang Pauli put forward hypothesis of the existence of the neutrino fromapparent non-conservation of energy in beta decay. The hypothesis was confirmed 25 years
later, and the neutrinos have been extensively studied since then. Nevertheless, the neutrino
remains one of the least understood particles.
The SuperKamiokande collaboration measured the atmospheric and solar neutrinos andfound evidence that the neutrino of a certain flavor oscillates into other flavors as it travels. The
neutrino flavor oscillations suggest that (at least the two of) the neutrinos have tiny non-zeromasses. The origin of the neutrino mass is not known, and it may be related to the origin of thebaryon asymmetry. The tiny neutrino mass scale also suggests a high mass scale for the righthanded neutrino through the see-saw mechanism.
Our universe is filled with cold neutrinos produced in the very early universe. High-energy
neutrinos are produced from astrophysical objects e.g. supernovae, supernova remnants, active
galactic nuclei(AGN), gamma-ray bursts, etc.
The neutrino can also be produced from dark matter annihilation or decay. Those
neutrinos can be detected by neutrino detectors such as SuperKamiokande and IceCubeat the South Pole. The indirect dark matter search using the neutrino will provides us withcomplementary information on the nature of dark matter.

Ultra-high-energy cosmic rays
Cosmic rays are considered to be produced by supernovae remnants in our Galaxy for E< 1015.5eV.
Those cosmic-ray particles with a higher energy are believed to have their origin outside
our Galaxy. They travel from extra galaxies to the Milky Way. If we go to even higher energies,
there is a well-known upper bound on the cosmic-ray energy, E < 5×1019eV, known as theGreisen-Zatsepin-Kuzmin(GZK) limit; a proton with energy above this cut-off cannot propagate
a cosmological distance because pions are produced from the interactions with the ambient
CMB photons. Studying the ultra-high-energy cosmic rays has two sides; one is to study the
astrophysical origin of the cosmic-rays at very large energy and its propagation to us. The otheris to search an exotic source for the ultra-high-energy cosmic-rays. The excess beyond the GZKlimit, if any, may be due to an exotic source such as the cosmic string. For instance very heavy
particles can be produced from the cusp of the string loop or when the strings interconnect,
and the decay product may contribute to the ultra-high-energy cosmic rays.
Since the ultra-high-energy cosmic-ray particles have the highest energy that human■ Particle Astrophysics Group
MemberMain Interest

Cosimo Bambi

General Relativity is our current and successful theory of gravity, but it has been tested
essentially only in the perturbative and weak field limit. The challenge is to figure out if
its predictions are still reliable in other contexts, such as the description of the universeor black hole physics.

Koichi Hamaguchi

Physics beyond the standard model, in particular SUSY models, their LHC
phenomenology and application to cosmology (baryogenesis, BBN constraints, dark
matter and its signatures).

Karsten Heeger

Solar neutrinos.

Junji Hisano

Theoretical studies for dark matter detection.

Alexander Kusenko

Ultrahigh-energy cosmic rays and very high energy gamma rays, dark matter,astrophysical neutrinos.

Sourav Mandal

Models beyond the Standard Model, and their signatures in astrophysics, cosmic rays
and colliders.

Kai Martens

The Telescope Array experiment studies the highest energy cosmic rays that permeate
the Universe with the aim to positively identify their origin. On the way to that lofty goal
I want to use hybrid events to better understand the air showers themselves.

Research Program

Neutrino physics:

beings have ever measured, it can directly probe physics at very high energy scales.

Hitoshi Murayama
Mihoko Nojiri

Seong Chan Park

Dark matter is my primary concern. As a short term goal, I hope to explain the recently
reported 'anomalies' in astrophysical observations: The 511 keV line from the galactic
center and the positron excess preliminarily reported by PAMELA. I am also interested
in linking DM with inflaton.

Jing Shu

Baryogenesis, electroweak phase transition, topological defects, and dark matter.

Naoshi Sugiyama

Acceleration of cosmic rays and its relevance for structures of the universe.

Fuminobu Takahashi

High-energy cosmic rays from dark matter.

Mark Vagins

My work involves probing the reactions within the sun via its neutrino emissions, as wellas measuring the dynamics of supernovas via their neutrino spectra and time structure.
Neutron detection in large water Cherenkov detectors would allow early warning, up toa week in advance, of the impending stellar collapse of a large, relatively nearby starlike Betelgeuse, and it would enable the detection of very late-time black hole formation
following supernova explosions anywhere within our galaxy.

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Research Programof axion, we may be able to detect them through microwave cavity experiment. Although
the interactions are weak, axions can be produced in the interior of stars (e.g. the Sun) andsupernovae. Also some fraction of gamma-rays emitted from a distant source may be converted
to axions on the way to the Earth.
Detailed study of such cosmological and astrophysical effects may reveal the presence of
the axion. It is known that many axion-like particles are present in the string theory. Interestingly,
the detection of very light axion from ground-based axion search or astrophysical observation
may shed light on the high-energy theory.

■ Proton Decay Group
MemberMain Interest

Takaaki Kajita

Updated searches for proton decays.

Jan Schuemann

Updated proton lifetime measurement using Gadolinium-enriched Super-Kamiokande.

Henry W. Sobel

Updated measurement of proton decay.

Yoichiro Suzuki

Future large water Cherenkov detectors and also future multi-purpose detectors fordark matter, double beta decay and low energy solar neutrinos. Development of a new
type of light sensor for such detectors.

Mark Vagins

Improving the proton decay measurement in water-based detectors via detection offree neutrons significantly suppressing atmospheric neutrino-induced proton decay
backgrounds. Development of next-generation, megaton-scale experiments for proton
decay.

Research Program

The stability of the proton
represents one of the greatest theoreticaland 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 with thefirst 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 grandunified theories with experimental data, and any progress toward this goal has unique value
for the 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. Everysubsequent grand unification theory will remain only a mathematical construct if further
experimental information is not available.
The search for nucleon decay requires massive detectors. A search with a sensitivity of1033 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, the best limit on this mode (τ/β > 8.2 × 1033 yr, 90% CL) comes froma 141 kton-yr exposure of Super-Kamiokande. The detection efficiency of 44% 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 result ofcombining several channels, the most sensitive of which is K + → μ +ν accompanied by a deexcitation signature from the remnant 15N nucleus. Monte Carlo studies suggest that this mode
should remain background free for the foreseeable future. The present limit on this mode is
τ/β > 2.3 × 1033 yr (90% CL).
Recent theoretical work suggests that if super-symmetric SO(10) provides the frameworkfor 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 suggest τ/β(eπ0 )≈1035 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 have made 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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Research Program

Proton Decay

Member

Main Interest

Damien Easson

Building models of inflation from string theory. Time dependent solutions in string
theory. Brane Gas model of string cosmology.

Dongfeng Gao

Mathematical aspects of string theory.

Jose Figueroa O'Farrill

AdS/CFT, M2-brane theories, and supergravity solutions.

Simeon Hellerman

String theory and its connections to quantum gravity, cosmology, condensed matter,particle physics and mathematics. Development of tools to understand and apply string
theory in generic environments.

Minxin Huang

Aspects of the AdS/CFT correspondence such as pp-waves, and giant gravitons.
Topological string theory.

Kentaro Hori

4d N=1 string compactifications in various frameworks, especially, worldsheet
approaches to Type II orientifolds with D-branes and fluxes, M-theory on G_ 2
holonomy manifolds, worldsheet approaches to heterotic strings. Topological strings aswell as supersymmetric gauge theories in various dimensions.

Shinobu Hosono

Mirror symmetry of Calabi-Yau manifolds and its applications to Gromov-Witten theory.

Toshiya Imoto

Holographic QCD.

Daniel Krefl

Topological string theory and mirror symmetry with O-planes and D-branes.

Wei LiBlack holes. Gauge/Gravity correspondence. 3D quantum gravity.

Andrei Mikhailov

String worldsheet theory, Green-Schwarz and pure spinor formalism, AdS/CFT,
integrability.

Shinji Mukohyama

String cosmology.

Tatsuma Nishioka

Gauge/Gravity Duality, Black Hole Physics.

Hirosi Ooguri

Development of theoretical tools to apply string theory to questions relevant to highenergy physics, astrophysics, and cosmology.

Domenico Orlando

Exact CFT solutions. Topological strings. Effective descriptions for M-theory.

Susanne Reffert

String compactifications. Topological string theory.

Ken Shackleton

Connection between string theory and the completion of the Weil-Petersson metric on
Teichmueller space.

Cornelius Schmidt-Colinet

Conformal field theory and its applications in string theory.

Yogesh Srivastava

Black Holes in String Theory, Gauge-Gravity correspondence and its applications invarious fields.

Shigeki Sugimoto

Conjectured duality between string theory and gauge theory, and its application to QCD
and hadron physics.

Tadashi Takayanagi

String theory as quantum gravity especially from the viewpoint of holography such as
AdS/CFT duality. Relation between the entanglement entropy and the gravitational
entropy such as the black hole entropy.

Taizan Watari

String phenomenology. Inflation (in the past). GUT and F-theory compactification.

Research Program

In the past few hundred years, scientists havesearched for fundamental laws of nature by exploring
phenomena at shorter and shorter distances. Does thisprogression continue indefinitely? Surprisingly, there
are reasons to think that the hierarchical structureof 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 sofar. One may then ask: can we build a collider withenergy 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 is the distance where the hierarchical structure of nature will terminate.
Space and time do not exist beyond the Planck scale, and they should emerge froma more fundamental structure. Superstring theory is a leading candidate for a mathematicalframework to describe physics at the Planck scale 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 of quantum gravity suchas 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 inmathematics. All of these aspects of string theory are vigorously investigated at IPMU.

■ String Theory Group

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Research Program

String Theory

Member

Main Interest

Issha Kayo

Extraction of cosmological information from the large-scale structure of the Universe,
particularly using the actual data taken by the Sloan Digital Sky Survey and virtual
data generated by N-body simulations. Construction of a homogeneous catalog ofgravitationally lensed quasars to constrain the dark energy.

Tsz Yan Lam

Distributions of dark matter halos and dark matter field. Environmental dependence of
halo formation.

Yen-Ting Lin

Atacama Cosmology Telescope (ACT) project, a large cluster survey that detects
clusters via the Sunyaev-Zel'dovich effect (SZE). Analyses of the data from ACT,
SDSS, and Subaru, to study the evolution of galaxies within clusters, as well as to use
the statistical properties of clusters (such as clustering and abundance) to constrain
cosmology.

Ikkoh Shimizu

Theoretical models of high redshift galaxies.

Naoshi Sugiyama

Investigation of linear evolution of structure in the universe and effect of magnetic
fields.

Masahiro Takada

Observational and theoretical studies of gravitational lensing caused by hierarchicalstructures of the universe. Nature of dark side of the universe, dark matter and darkenergy, with the gravitational lensing observables. Future Subaru Weak Lensing
Survey.

Masayuki Tanaka

Observational studies of the formation and evolution of galaxies and large-scale
structures using data from the Sloan Digital Sky Survey, Subaru telescope, and Very
Large Telescope.

Atsushi Taruya

Modeling dynamics and statistics of large-scale structure of the Universe, and testing
various cosmological scenarios and/or hypothesis through direct comparison between
theory and observations. A pursuit of the prospects for future observations suchas HSC and BOSS to constrain dark energy, massive neutrinos, primordial nonGaussianity as well as to test theory of gravity.

Rajat Mani Thomas

21cm observations of the epoch of reionization. Fast computation of HII bubble growthin the early universe.

Marcos Valdes

Cosmic reionization and the nature of dark matter. High-energy astrophysics.

Naoki Yoshida

Formation of stars, galaxies and the large-scale structure of the universe using
supercomputer simulations.

Research Program

There are rich structures in the presentday universe, such as stars, galaxies, andlarge-scale structure. We study how theseobjects are formed using large computer
simulations and sophisticated theoreticalmodels.
The standard Big Bang model posits
that the universe was nearly homogeneousand ver y hot when it was born. Tiny``ripples'' in the distribution of matter are
generated through a rapid expansion phasecalled inflation in the very early universe.
These primeval density fluctuations growby the action of gravity, eventually forming
luminous objects such galaxies.
The energy content of the universe and basic statistic that describe the condition of theearly universe have been 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 make solid predictions, whereas a broad class ofobservations can be directly used to verify them.
Our primary interests are in primordial star formation in the early universe, the formationand evolution of galaxies, and the formation of large-scale structure. Results from these studies
will be used for making good plans and proposals for next generation large observational
programs such as Subaru-HSC dark energy survey.

■ Structure Formation Group47

46

Research Program

Structure Formation

Member

Main Interest

Alexander Kusenko

Pulsar kicks, supernova neutrinos, supernova asymmetries.

Keiichi Maeda

Theory of nucleosynthesis and radiation transfer. Observations of individual
supernovae.

Masayuki Nakahata

Search for supernova neutrinos using Super-Kamiokande detector. It covers bothsupernova burst neutrinos and supernova relic neutrinos.

Ken'ichi Nomoto

Type Ia supernova cosmology to provide precision constraints on cosmic accelerationand the equation of state of dark energy by clarifying the progenitors and explosion
mechanism. Evolution and nucleosynthesis of first stars to study cosmic chemical
evolution. Gamma-ray bursts and hypernovae to clarify the production mechanisms ofhuge explosion energy from black holes and neutron stars.

Takaya Nozawa

Evolution of dust at high redshifts, considering the formation of dust in supernovae anddestruction of dust in the shock driven by supernovae.

Jan Schuemann

Gadolinium-upgrade for Super-Kamiokande for observing neutrinos from supernova
formations, past and present.

Henry W. Sobel

Super-Kamiokande and T2K for studying neutrino physics, supernova, and proton
decay.

Yoichiro Suzuki

Development of future multi-megaton detectors which can detect neutrino bursts fromsupernovae every year.

Yasuo Takeuchi

Real-time neutrino burst search in Super-Kamiokande.

Masaomi Tanaka

Observations of core-collapse and Type Ia supernovae especially with optical
spectroscopy and spectropolarimetry. Numerical simulations of radiative transfer.

Shinya Wanajo

Origin of elements that are synthesized in supernovae. Nucleosynthesis of r-process
species (e.g., gold, platinum, uranium, etc.) in core-collapse supernovae.

Mark Vagins

Detection of the diffuse neutrino background produced by distant supernovae.
Improvement of Super-Kamiokande experiment's response to the arrival of a burst ofneutrinos from a supernova within our galaxy.

Naoki Yoshida

Theory of evolution of very massive stars and core-collapse supernovae. Supernova
light-curves and hunting for high redshift supernovae using groud-based and spacetelescopes.

Research Program

Supernovae are explosions of stars
at the end of their lives. Core-collapse
supernovae (Type II, Ib, and Ic) are theoutcome 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 bya 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 of which can not
be addressed by experiments on the Earth.
Furthermore, they are the main contributorsof heavy elements in the Universe; withoutthem, baryons in the Universe would be only hydrogen, helium and some minor elements,
although in reality the Universe is filled with about a hundred different sorts of elements. Theirenergy produced at the explosions is huge, and supernova explosions could play importantroles even in formation and evolution of galaxies. Finally, importance of understanding theirnatures is highlighted by their use as cosmological distance indicators, leading to the discoveryof 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; Evolution ofstars toward supernovae (K. Nomoto), theory of core-collapse and explosion (K. Sato), theoryof neutrinos from supernovae (K. Sato) and attempt to detect these neutrinos at Kamioka (M.
Vagins), theory of thermonuclear explosion (K. Nomoto), nucleosynthesis of elements up toiron (K. Maeda) and beyond (S. Wanajo), formation of dust grains (T. Nozawa), theory of opticalemission from supernovae and evaluation of their use as cosmological distance indicators (K.
Nomoto, K. Maeda), and observations using the Subaru telescope (K. Maeda). By unifying
these attempts, we aim to comprehensively understand supernovae and their influences on theevolution of the Universe.

■ Supernova Group

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Research Program

Supernova

6. Research Highlight
The Most Luminous Type Ia Supernova

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Research Program

Research Highlight

The acceleration of the expansion of our universe was revealed at the end of the 20th
century by the observations of distant Type Ia supernovae (SNe). Type Ia SNe are the explosionsof white dwarfs. The explosion is triggered when the mass of the white dwarf becomes closeenough to a limiting mass, so called the Chandrasekhar limit (1.4 solar mass). Thanks to thisproperty, Type Ia SNe have a nearly constant luminosity. This uniformity, as well as its brilliant
luminosity, is the reason why Type Ia SNe can be used as a distance indicator in the universe.

■ Optical image of the most luminous Type Ia SN 2009dc in UGC 10064, taken with the
KANATA telescope, Higashi-Hiroshima observatory, Hiroshima University. The SN ismarked with the two lines. The image size is 3 arcmin x 3 arcmin.

However, an interesting Type Ia SN, named SN 2009dc, was discovered in 2009 April.
Masaomi Tanaka, together with a team of collaborators, conducted intensive observations
for this SN with Subaru telescope and domestic telescope. As a result, the research group hasrevealed that this SN is the most luminous Type Ia SN in history. The luminosity is nearly 3 times
as luminous as other Type Ia SNe (and is 8 billion times as luminous as the sun!).
To emit this huge luminosity, 1.6 solar mass of radioactive 56Ni, the heating sourceof SNe, is required. This means that the progenitor white dwarf exceeds the Chandrasekhar
limit! Before 2009, two other extremely luminous SNe 2003fg and 2006gz have been
already discovered (although they are less luminous than SN 2009dc). For these two objects,``super-Chandrasekhar mass'' white dwarf has also been suggested. However, there is also

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Further reading: The Astrophysical Journal 2010, Vol. 714, pp. 1209-1216, The AstrophysicalJournal Letters 2009, Vol. 707, pp. L118-L122.

■ A schematic illustration of the polarization property of a SN. If the explosion is round,the strength of the emission is independent on the oscillation direction. On the other
hand, if the explosion is not round (``deformed''), the strength of the emission depends
on the oscillation direction. The research group revealed that the emission from the mostluminous Type Ia SN 2009dc is consistent with the ``round'' case.

In theoretical physics, toy models play important roles. They are simplified versions ofphysical systems, capturing their essential features. For example, the harmonic oscillator is a
toy model of pendulum motion, and it provides a good approximation to small-angle swings.
It turned out that the harmonic oscillator can be used to describe a variety of other physicalphenomena, such as vibrations of elastic bodies, hydrodynamic and electromagnetic waves,electrical circuits, and creation and annihilation of elementary particles. Simplicity of toy models
often leads to a broad range of applications.
Superstring theory is an ambitious attempt to combine quantum mechanics and generalrelativity and to construct the ultimate unified theory of elementary particles. Superstring theory
is defined in 9 space and 1 time dimensions. Since we live in the world with only 3 spacedimensions, 6 extra dimensions, if exist, must be hidden from our sight. One way it can happenis that the extra dimensions are curled up to form a “compact” space so small that we needextremely high energy to see it. Geometrical properties of such 6-dimensional spaces are actively
studied by mathematicians and physicists, but many problems remain. For example, we do noteven know an expression for its metric tensor - the most fundamental geometric quantity todescribe a curved space. Without knowing the metric tensor, it would not be easy to computephysical quantities from superstring theory, or so it seemed.
Topological string was invented by Edward Witten as a toy model of superstring theory.
In 1993, Hirosi Ooguri and his collaborators developed powerful mathematical tools to computequantum amplitudes of this toy model. They also showed that these amplitudes can be used
to compute certain scattering amplitudes in superstring theory, when 6 extra dimensions are
curled up to a compact space as described in the above paragraph. The simplicity of topologicalstring makes it possible to compute these amplitudes without knowing details of the metrictensor in 6 dimensions. However, physical significance of these superstring amplitudes was notclear at that time.
It took 11 years for Ooguri and collaborators to find a compelling question in physics towhich these amplitudes give an answer. In 2004, Ooguri together with Andrew Strominger andCumrun Vafa of Harvard discovered that topological string can be used to count the numberof microscopic quantum states of a black hole. In the early 1970’s, Bekenstein and Hawking
proposed a formula for the entropy of black holes based on a remarkable mathematical analogy
between thermodynamics and black hole mechanics and on the semi-classical theory of blackhole radiance. Ooguri and the collaborators found that, by using the topological string theory,
one can go beyond the semi-classical theory and incorporate quantum effects near black holes
in the computation. They showed that the quantum corrected entropy formula can be concisely
expressed in terms of the topological string amplitudes.
In superstring theory, D-branes can be used to describe black holes. For such black holes,
microscopic quantum states are described as bound states of D-branes. The black hole entropy
should then be equal to the logarithm of the number of D-brane bound states. In the past few
years, methods to count D-brane bound states have made dramatic progress. In particular, its
relation to topological string has been much clarified.

Research Highlight

Topological String and Black Hole Microstates

53

Research Highlighta scenario that these extremely luminous SNe are caused by a highly asymmetric explosionof a Chandrasekhar-mass white dwarf. Unfortunately, we cannot ``see'' the shape of the SN
explosion because SNe are discovered in distant galaxies (about a few million light years away).
Thus, the research group performed the polarization measurement of this SN with the
Subaru telescope equipped with an instrument, FOCAS. If the explosion is not round, wewould detect a variation in the strength of the light, depending on the oscillating direction ofelectromagnetic wave (``deformed'' case in the figure). This is the first polarization measurement
for the candidate of``super-Chandrasekhar'' mass SN. With accurate measurements, thepolarization was found to be only less than 0.3%. Therefore, the most luminous Type Ia
SN 2009dc is almost round, and thus, it is concluded that the progenitor has a ''superChandrasekhar'' mass.
The progenitor star of SN 2009dc is thought to be rapidly rotating so that it can support
the large mass. The uniformity is an important property of Type Ia SNe as a distance indicator.
The newly discovered,``super-Chandrasekhar'' mass Type Ia SN casts questions on the current
theoretical scenario of Type Ia SNe and their use in cosmology. The research was conducted by
the team of IPMU (Masaomi Tanaka, Ken ichi Nomoto, and Keiichi Maeda), Hiroshima University(led by Masayuki Yamanaka), National Astronomical Observatory of Japan, Gunma Astronomical
Observatory, Kagoshima University, Tokyo Institute of Technology, Max Planck institute for
Astrophysics, and Scuola Normale Superiore di Pisa.

54

Further reading: Communications in Mathematical Physics 292 (2009) 179, Physical Review
Letters 102 (2009) 161601.

■ An ice is a crystal of water molecules. When it melts, it starts losing molecules from its
corners. Similarly, the space-time without a black hole corresponds to a perfect crystal.
As the crystal loses molecules or atoms, the black hole grows larger. The geometry of theCalabi-Yau manifold is encoded in the combinatorial structure of the crystal.

The main aim of string theory is a quantization of gravity and a unification of all forcesin our universe. Therefore, in principle, we expect that we can calculate any quantities inphysics from string theory. Even though the properties of quantum gravity which string theory
presents us still have not been completely understood till now, many interesting applications ofstring theory to condensed matter systems have been attempted for these several years, suchas superfluid, quantum Hall effects, cold atoms and high Tc superconductors. Indeed, Hirosi
Ooguri and Tadashi Takayanagi at IPMU, together with Hideo Aoki in the University of Tokyo,
Masaki Oshikawa at the Institute for Solid State Physics and Shinsei Ryu in University of California
at Berkeley, organized an IPMU Focus week entitled ``Condensed Matter Physics Meets HighEnergy Physics'' in February 2010.
An important reason why string theory can be useful to condensed matter physics stems
from the relation called holography, which means an equivalence between quantum gravity
on various spacetimes and quantum manybody systems. This is remarkable in that we candescribe a gravitational theory equally by a theory without gravity. Another attractive point ofholography is that it relates a strongly coupled quantum system to a weakly coupled gravity
theory. This means that we can calculate physical quantities in complicated quantum systems
analogous to e.g. some types of superconductors from the Einstein's general relativity.
Originally, the idea of holography was found by analyzing properties of remarkableobjects, called D-branes, in string theory. A Dp-brane is a (p+1) dimensional hypersurface
where open strings can end, embedded in the ten dimensional spacetime of string theory.
Since an open string generates a gauge field, N coincident Dp-branes is described by a (p+1)
dimensional U(N) gauge theory. On the other hand, since D-branes are massive objects, they
will bend the spacetime metric according to the general relativity. Thus, eventually, we canreplace D-branes with a curved spacetime. This equivalence between two different viewpointsof D-branes lead to the idea of holography.
Topological insulators are very interesting materials which have been studied recently
by experiments and have been analyzed energetically by condensed matter theorists. The
definition of a topological insulator is very simple (see the left figures).
The material itself is an insulator and thus no currents flow in its bulk. However, if it has
a boundary by cutting its edge, then along this boundary some currents (such as the electric,
spin or heat current) can flow. We can regard topological insulators as generalizations of
the quantum Hall effect. In quantum Hall effect, an electric current will be generated at theboundary of (2+1) dimensional material with a magnetic flux so that the current is orthogonal
to the electric field. One relatively new example of topological insulators is the spin quantum
Hall effect. This phenomena occurs in insulators with a time reversal symmetry and the spincurrent at the boundary is induced in the presence of an orthogonal electric field. Even thoughseveral topological insulators are known at present, their systematical classifications andpossibilities of undiscovered new insulators have not been understood well. In particular, thisproblem has been known to be very difficult in strongly coupled systems. Thus the holography
may be able to resolve some of the related issues.

Research Highlight

Topological Insulators from String Theory

55

Research Highlight

In 2009, Ooguri with IPMU graduate student Masahito Yamazaki discovered a new
description of quantum states of black holes. They showed that, when the extra 6-dimensional
space is curled up to a class of spaces called ``toric Calabi-Yau manifolds'', each quantum stateof a black hole constructed by D-branes is in one-to-one correspondence with a configuration ofa molten crystal in 3 dimensions.
An ice is a crystal of water molecules. When it melts, it starts losing molecules from its
corners. Similarly, according to the work by Ooguri and Yamazaki, the space-time without ablack hole corresponds to a perfect crystal. As the crystal loses molecules or atoms, the blackhole grows larger, as shown in the figure. The geometry of the Calabi-Yau manifold is encodedin the combinatorial structure of the crystal.
In the subsequent paper, Ooguri and Yamazaki showed how the smooth geometryof Calabi-Yau manifolds emerges from the thermodynamic limit of the crystal melting model,
where a macroscopic number of atoms are removed from the crystal. In this model, atoms ofthe crystal are fundamental constituents of space and time.
In the unified theory of quantum mechanics and general relativity, it is expected thatspace and time do not exist at distance shorter than the Planck length, which is about 10-36
meters. Rather, they should emerge from more fundamental concepts. The crystal melting model
discovered by Ooguri and Yamazaki will be an important toy model as we explore physics at the
Planck scale.

56

Further reading: Journal of High Energy Physics 06, 066 (2009) and arXiv:1001.0763.

■ A schematic structure of topological insulators (left) and their D-brane constructions instring theory (right). The upper or lower left figure shows a sketch of quantum Hall effector spin quantum Hall effect, respectively. In the quantum Hall effect, the time reversal
symmetry is broken by the magnetic flux and only up spin electron moves along the edgeof the (2+1) dimensional material. On the other hand, in the latter case, the time reversal
symmetry requires that an up spin electron should always be accompanied with a down
spin electron moving in a opposite way. Thus there is no net charge current, but is a spincurrent. We show in the two right figures their D-brane configurations in superstring theory.
In the upper right figure, the open string between the D7 and D3-brane leads to a massive
Dirac fermion in (2+1) dimension which is identified with an electron with the up spin in
the quantum Hall systems. Notice that the (2+1) dimension spacetime extends in thecommon directions of D7 and D3-brane world-volume. In the lower right figure, we have an
orientifold 3-plane in addition, we will have two fermions by considering the mirror imageof D3-brane which is an anti D3-brane. Accordingly we will have two kinds of open strings
and they are identified with up and down spin electrons, respectively. The time reversal
symmetry of spin quantum Hall effect is now mapped to the orientifold projection in string
theory.

Let us imagine the time is reversed and we go back toward the beginning of theuniverse. The universe in the early epoch was denser, more energetic and more curved. At somepoint, quantum fluctuations become so significant that the usual description based on classicaltheory totally breaks down. In this realm of quantum physics, even Einstein's theory of generalrelativity won't work. Therefore, in order to understand the beginning of the universe we need``quantum gravity'', a dream theory reconciling Einstein's general relativity and quantum theory.
For this and many other reasons, finding an ultimate theory of quantum gravity has been
one of the greatest dreams in theoretical physics. In January 2009, Petr Hořava's proposeda new candidate theory for quantum gravity. This theory has a property called ''powercounting renormalizability'', which is an indication of good behavior of the theory at highenergies. Having a new candidate theory for quantum gravity, it is important to investigate its
cosmological implications.
Shinji Mukohyama at IPMU showed that Hořava's new theory does not precisely recover
general relativity at low energy but can instead mimic general relativity plus dark matter. Keisuke
Izumi at IPMU, along with Mukohyama, strengthened this picture by proving that there is nospherically-symmetric, exactly static stellar solution in this theory: the ''dark matter'' slowly
accelerates toward a star and thus makes the stellar center slightly dynamical. The existenceof built-in ``dark matter'' is an inevitable prediction of the theory and might solve the mysteryof dark matter. If we believe Einstein's general relativity then we need dark matter to explain
observational data. On the other hand, if Hořava's new theory is right then it might be the casethat we do not need dark matter at all because gravity behaves differently from what we think
we know.

■ Physical wavelength (red) vs. sound horizon scale (black). Physical wavelength (〜 a/ k )exits the sound horizon ( 〜 (M 2H )-1/3 ) in the high-energy epoch (H≫M ) and re-enters thehorizon (〜 H-1) in the low-energy epoch (H≪ M ), where k is the comoving wave number,4
a is the scale factor of the universe, H=a /a is the Hubble expansion rate and M is theenergy scale above which the anisotropic scaling becomes important. In this figure, apower-law expansion a ∝ t p with 1/3< p <1 is supposed.

Research Highlight

Cosmological implications of new quantum gravity theory

57

Research Highlight

Motivated by this, Takayanagi studied this problem with a condensed matter theorist
Ryu from string theory viewpoints. They eventually found that all known topological insulators
can be realized as systems of Dp-branes and Dq-branes in superstring theory with or without
another object called orientifolds (see the right-hand side of the figure). Different types of
topological insulators correspond to different choices of the dimensions (i.e. p and q) of
D-branes and orientifolds. This also fits nicely with a mathematical framework called K-theory.
Our D-brane construction offers us a convenient way to write down an effective quantum field
theory which describes each of topological insulators taking into account interactions. At thesame time, this leads to the construction of their holographic duals.
As the most important example of such holography, Ryu and Takayanagi, together with
Wei Li at IPMU and Mitsutoshi Fujita in Kyoto University constructed a holographic dual of
fractional quantum Hall effect based on string theory for the first time. They calculated theHall conductivity and topological entanglement entropy and found they agree with what we
expect.

Further reading: Physical Review D80 (2009) 064005; Journal of Cosmology and Astroparticle
Physics 0906 (2009) 001; Physics Letters B679 (2009) 6.

■ Predicted gravitational wave background spectrum. Solid (dashed) black line
corresponds to M=1011(108)GeV. A mode enters the horizon in the matter dominated era,radiation dominated era with IR regime and radiation dominated era with UV regime asshown by MD, RD(IR) and RD(UV) on the top of the figure, respectively. Sensitivities of
DECIGO (BBO) and ultimate-DECIGO are also shown by blue dotted lines.

The basic object of study in algebraic geometry is algebraic variety --- the set of solutions
to a system of polynomial equations over complex numbers. For instance, the equation xy= zw defines a three-dimensional quadratic cone (which is singular at the origin) and its
projectivization defines a smooth projective quadric surface in 3-dimensional projective space.
Imposing an extra equation w=z defines a section --- complex projective curve called conic.
Projection from a point on a conic establishes its isomorphism with a complex projective line, it
has a topology of two-dimensional sphere and one can introduce a metric of positive curvature
on it.
Positively curved complex projective varieties are called Fano varieties . Projective spaces
and smooth quadrics are of this kind. Kollar, Miyaoka and Mori proved that there are only afinite number of possible topologies for smooth Fano varieties in any given dimension. The
only Fano curve is a conic, Fano surfaces (known also as del Pezzo surfaces) are either quadricor blowups of the projective plane in d generic points with d <8. A complete classification ofsmooth Fano threefolds is due to Iskovskikh, Mori and Mukai. Yet there is no classification or
any conceptual description for Fano varieties in dimensions higher than 3. Most of the known
examples are homogeneous varieties, complete intersections therein, and their blowups.
One may tackle the geometry of these spaces with the new mathematics influenced
by the homological algebra and the string theory. Bondal and Orlov have shown that a Fano
variety can be reconstructed from its derived category of coherent sheaves. Two points on a
Fano variety are connected by a rational curve (image of projective line), so it has a rich theoryof genus--zero Gromov--Witten invariants (quantum cohomology) which can be elegantly
packed into one quantum differential equation (QDE). Finally, there is a conjectural mirror
duality between Fano varieties and Landau−-Ginzburg models (functions of multiple argumentof a certain kind).
Can any of these ``physical'' ideas help us in understanding (or predicting) the answer
to questions in geometry like ``how to classify Fano varieties'',``what can one say about their
topologies'' or ``how to degenerate a given variety?''
The research of the IPMU mathematician Sergey Galkin and his collaborators addresses
the latter two questions and provides a new hope for the first one.
In order to classify Fano varieties by using mirror symmetry, one needs first to determine
the shape of the objects on the mirror side and the properties that distinguish them among
similar objects. In other words, one needs to know what is special about differential equations
that come from the quantum cohomology, and what properties determine the Landau-Ginzburg models (Laurent polynomials) that are mirror dual to the Fano varieties.
In his pioneering work unveiling the modular nature of QDE's for threefolds with thesecond Betti number equal to one, Vasily Golyshev found mirror--dual variations to all 17
families of threefolds on Iskovskikh's list and predicted their Gromov-Witten invariants. In order
to extend this method to higher dimensions, one needs more fundamental ideas as to theproperties that distinguish the QDEs in the set of differential equations, and also the geometricproperties that characterize Landau--Ginzburg potentials among other functions.
Mirror symmetry would also imply the existence of a natural integral structure in the

Research Highlight

Fano Varieties in the Mirror

59

Research Highlight58

One of the most essential ingredients of the new theory is a short-distance behavior
called anisotropic scaling. Indeed, the``power-counting renormalizability'' mentioned above
stems from it. Based on the anisotropic scaling, Mukohyama proposed a new mechanism togenerate scale-invariant cosmological perturbations without relying on cosmic inflation. The
first figure illustrates the basic idea of the mechanism. Physical wavelength (red) exits thesound horizon (black) in the high-energy epoch (left) and re-enters the horizon (black) in the
low-energy epoch (right). This mechanism, as confirmed by many authors, can seed the rich
structures in the universe such as galaxies and clusters of galaxies.
Fuminobu Takahashi and Shinji Mukohyama at IPMU, in collaboration with Kazunori
Nakayama (U. Tokyo) and Shuichiro Yokoyama (Nagoya U.), investigated other cosmologicalimplications of the anisotropic scaling such as enhancement of baryon asymmetry andgravitational waves. Second figure shows the gravitational wave background spectrum for
M=1011(108)~GeV, where M is the energy scale above which the anisotropic scaling becomes
important. Future gravitational wave detectors may have a chance to detect characteristic
spectral shape of the gravitational waves if M happens to be close to the current observationalbound.
While we have found a number of intriguing cosmological implications, this theory is stillin its infancy as a candidate theory of quantum gravity. Further theoretical studies are needed.
Also, it is important to seek signatures of the theory in various experiments such as FERMI,
H.E.S.S., MAGIC, DECIGO, BBO, etc.

of the general toric degenerations no method of assigning coefficients to the monomials inside
the corresponding polytope is known.
However, one can relate the Laurent polynomials to different degenerations of a given
variety by special birational transformations which preserve the volume form Π dxix i . Thus
recently Sergey Galkin and Alexander Usnich have shown that, starting from a Laurent
polynomial which is mirror dual to a del Pezzo surface, one can consecutively apply the cluster
mutations (e.g. see the figure below) and predict the infinite hierarchy of toric degenerations
for a given variety.
We remark that the complete list of toric degenerations is known so far only in the caseof the projective plane. Moreover the very conditions of mutability impose strong restrictions
on coefficients of the Laurent polynomials. Are these restrictions sufficient to pinpoint thepolynomials?

61

60

Further reading: http://sergey.ipmu.jp

Research Highlight

Research Highlightquantum cohomology, i.e. a flat lattice with respect to the quantum connection. This integral
structure comes from the integral structure in the K-theory of holomorphic cycles as its mirror
transform by the cohomological Gamma-class , as shown by Hiroshi Iritani in the case of toric
stacks. In a different development, Sergey Galkin has introduced the Apery class which is an
explicit invariant of a Fano variety derived from its quantum cohomology ring and QDE. Galkin
and Iritani conjectured that these two cohomology classes coincide for a large class of varieties,
and together with Golyshev were able to prove it for varieties similar to Grassmannians. Thisconjecture (in conjuction with standard conjectures on algebraic independence of values ofRiemann's zeta-function) allows one to read off characteristic numbers of a variety from its QDE.

■ An extraordinary, in many respects, family of prime Fano threefolds V 22 has a small
toric degeneration T 22, which is quite extraordinary, too. Toric Fano varieties are encodedby lattice polytopes, and the polytope of T 22 is the only self-dual polytope with quadratic
cone singularities in dimension 3. It has 9 rectangular faces that correspond to 9 singularpoints and 4 triangular faces that correspond to 4 smooth torus-fixed points and the
4-dimensional cohomology of V 22. The mirror is given by the Laurent polynomial
  1  

  1  

  1  

  X  

  Y  

  X  

  Z  

   YZ       X       1   X ＋  X    ＋ Y ＋  Y    ＋ Z ＋  Z    ＋  Y    ＋  X    ＋  Z    ＋  X    ＋   X    ＋  YZ    ＋  YZ   The other approach (toric degeneration hypothesis ) is currently but a phenomenology.
The known smooth Fano varieties tend to admit a degeneration to a singular toric variety(e.g.
see the figure above) or a complete intersection therein. Thus, a smoothable toric Fano variety
may suggest a mirror dual Landau--Ginzburg model of the Fano smoothing and enable one topredict its properties and numerical invariants.
In the case of smooth toric Fano varieties the ``toric degeneration hypothesis'' has been
proven by Givental: the mirror of such variety is a Laurent polynomial Σm x m where m runs overall vertices of its toric fan. For example, a quadric surface and a projective plane are known tohave the mirror as Laurent polynomials X ＋ Y ＋   X1     ＋  Y1      and X ＋Y ＋  XY1        , respectively. It isconjectured that the hypothesis also holds for degenerations of smooth varieties into toricvarieties with singularities similar to the singularity of a quadratic cone at the origin. In the case■ All varieties in the family of quadric surfaces xy =z (z-cw ) that depend on the parameterc are toric. For c ≠ 0 all these surfaces are isomorphic to the smooth one which is a
cartesian square of a line (upper figures). The degenerate fiber c =0 is a cone over a conic
1   
1   
(lower figures). The respective Laurent polynomials are X ＋ Y ＋  X    ＋  Y    and Y ＋
  1  

X ＋３＋   X        

X Y

   

Y

   

. These polynomials are related by the transformation (X,Y ) → (   1 ＋ X    ,   1 ＋ X    )＋    Y   d X    d Y    which preserves the volume form     X    ∧     Y    . On the cluster level it is seen as atransformation between two quadruples of integer vectors.

Seminars

Research Highlight

7. Seminars

Apr 1, Henry Tye, Cornell
Is there eternal inflation in the cosmic landscape?

62

Apr 2, Wei Song, Inst. Theo. Phys., Chinese Acad.Sci.
The Kerr/CFT Correspondence
Apr 9, Elias Kiritsis, Univ. Creta
Improved Holographic QCD
Apr 15, Christophe Grojean, CERN
Composite Higgs Physics
Apr 16, JoAnne Hewett, SLAC
Supersymmetry Without PrejudiceApr 21, Florian Gmeiner, NIKHEFThe Landscape of Intersecting Brane Models
Apr 27, Todor Eliseev Milanov, North Carolina State
Univ.
Gromov-Witten Theory and Integrable Hierarchies
May 8, Ken-Ichi Yoshikawa, Univ. TokyoK3 surfaces with involution and Borcherds
products
May 28, Smadar Naoz, Tel Aviv
The first generation of galaxies and 21cm
fluctuations

Jun 2, Ue-LiPen, CITA
21cm cosmology
Jun 4, Sergei Galkin, IPMU
Apery and Gamma
Jun 4, Douglas Bryman, Univ. British Columbia
Rare Opportunities: Seeking New Physics withRare Decays of Light Particles
Jun 4, Joseph Maher, Titech
Generic elements of the mapping class group
Jun 5, Darren Reed, Los Alamos
Cosmological Simulations of Early Structure
Formation
Jun 8, Kiyonori Gomi, Kyoto Univ.
Multiplication in differential cohomology andcohomology operation
Jun 10, Raphael Hirschi, Keele Univ.
Massive Stars: Key Players in the Early Universe
Jun 10, Georg Raffelt, Max Planck Inst.
Axions in Particle Physics and Cosmology
Jun 11, Marina Cortes, Univ. Sussex
Viable inflationary models ending with a firstorder phase transition

May 28, Lotte Hollands, Univ. Amsterdam
Quantum Curves and D-Modules

Jun 11, Gaston Giribet, Univ. Buenos Aires andCONICETOn three-dimensional chiral gravity

Jun 1, Paschal Coyle, Marseille
The ANTARES Deep-Sea Neutrino TelescopeJun 12, Shinji Mukohyama, IPMU
Aspects of Horava-Lifshitz cosmology

63

JFY2009Jun 16, Kendrick Smith, Univ. Cambridge
Primordial non-Gaussianity and constraints from
WMAP

SeminarsJun 17, Eiichiro Komatsu, Univ. Texas
Lecture on B-mode polarization and Primordial
non-Gaussianity: Two big things to expect fromthe Planck data
Jun 18, Mihoko M. Nojiri, IPMU/KEK
Novel reconstruction technique for New Physics
processes with initial state radiation
Jun 19, Ken-Ichi Yoshikawa, Univ. TokyoK3 surfaces with involution, equivariant analytic
torsion and automorphic forms
Jun 29, Subhabrata Majumdar, TIFR
Two Topics in Cluster Cosmology: Studying Dark
Energy and Sigma864

Jun 30, Kin-Wang Ng, Inst. Phys. Taiwan
Some thoughts on the large-scale CMB anomalies
Jul 2, Kazunori Nakayama, ICRR
Cosmological and astrophysical probes of dark
matter annihilation
Jul 9, Michihisa Takeuchi, ICRR
Collider phenomenology of split-UED

Aug 5, Kazuaki Ota, RIKEN
Deep Surveys of z=7 Ly-alpha Emitting Galaxies
with Subaru Telescope:Implications for Galaxy
Evolution and Reionization
Aug 5, Ian Low, Argonne/Northwestern Univ.
Theoretical Constraints on the Higgs Effective
Couplings
Aug 6, Hiroya Yamaguchi, RIKEN
Recent studies on supernova nucleosynthesis with
X-ray observations of supernova remnants
Aug 6, Nick Dorey, DAMTP
Spiky strings and spin chains
Aug 11, John Ellis, CERN
Last bets for Higgs and Supersymmetry before the
LHC starts
Aug 12, Nanhua Xi, Chinese Acad.Sci.
Kazhdan-Lusztig Theory
Aug 13, Katsuyuki Naoi, Univ. Tokyo
Categorical approach for Weyl modules, after
Chari-Fourie-Khandai
Aug 19, Hiroshi Ohta, Nagoya Univ.
Lagrangian intersection Floer theory -- thefoundation and some calculations
Aug 19, Young-Kee Kim, Fermilab
Fermilab Plan with an Intensity Frontier
Accelerator

Sep 8, Toshi Oshima, Univ. Tokyo
Fractional calculus of Weyl algebra and its
application to ordinary differential equations on
the Riemann sphereSep 8, Bryan Webber, Univ. Cambridge
1st lecture: Deep inelastic scattering, parton
distributions and parton showering
Sep 9, Stuart Freedman, Berkeley and IPMU
Oscillating Neutrinos and Oscillating Decay
Probabilities
Sep 14, Bryan Webber, Univ. Cambridge
2nd lecture: Jet fragmentation, hadronization andhadron-hadron processes
Sep 15, Minxin Huang, IPMU
Topological strings, black holes, and matrix
modelsSep 17,Hiroshi Iritani, Kyushu Univ.
Quantization in semi-infinite Hodge theory
Sep 18, Peter Zograf, Steklov Inst. St.Petersburg Dept.
Volumes of moduli spaces of algebraic curves
Sep 24, Rajat Mani Thomas, IPMU
Fast Reionization Simulations for LOFAR
Sep 25, Paul H. Frampton, UNC and IPMU
p-adic strings
Oct 2, Elizabeth Tasker, Univ. Florida/NAOJ
The Evolution of Giant Molecular Clouds in Global
Disk Galaxy Simulations
Oct 7, Saul Ramos-Sanchez, DESY
Heterotic Orbifold Phenomenology: Status andProspects

Jul 15, Kunihito Ioka, KEK
Cosmic-Ray Positrons and Supernova/Pulsar/GRB
Remnants

Aug 20, Goh Hock-seng, Berkeley
Twin Higgs and Lepton Number Violation at the
LHC

Jul 15, Tsutomu Yanagida, IPMU
Dark Matter and PAMELA / Fermi Anomalies

Aug 20, Brian Feldstein, Boston Univ.
Form Factor Dark Matter

Oct 9, Martin Crocce, Inst. Space Science, Spain
The MICE simulations : Abundance of Massive
Clusters and Large Scale Clustering

Jul 16, Kentaro Nagamine, Univ. Nevada
Escape fraction of ionizing photons in high-z
galaxies

Aug 25, David Morrison, UCSB
Non-geometric heterotic compactifications

Oct 9, Yuji Tachikawa, IAS
2d Liouville correlators from 4d gauge theories

Aug 25, Min-Su Shin, Princeton Univ.
Testing AGN feedback models and simulating
environmental effects on AGN activities

Oct 14, Paul Frampton, UNC and IPMU
1st lecture: Neutrino Masses and Mixings

Jul 16, Matthias Gaberdiel, ETH Zurich
Extremal (super-) conformal field theories
Jul 21, Ingo Runkel, King's College London
Defects and symmetries
Jul 23, Yuu Niino, Kyoto Univ.
Modeling GRB Host Galaxies
Jul 23, Bernard Nienhuis, Amsterdam Univ.
Entanglement in quantum chainsAug 28, Paul Zinn-Justin, Univ. Pierre et Marie Curie
Exactly solvable models of tilings and Littlewood-Richardson coefficients
Aug 31, Misha Verbitsky, IPMU
Global Torelli theorem for hyperkaehler manifolds

Oct 15, Maxim Kontsevich, IHES
Stability and Wall-crossing for Derived Categories I
Oct 15, Jason Evans, IPMU
Higgs Exempt No-Scale Supersymmetry
Oct 16, Maxim Kontsevich, IHES
Stability and Wall-crossing for Derived CategoriesII

Oct 20, Zoltan Bajnok, Hungarian Acad.Sci.
Finite size effects in integrable models: planar
AdS/CFT
Oct 21, Paul Frampton, UNC and IPMU
2nd lecture: Studies of T' Flavor Symmetry
Oct 21, Matt Sudano, IPMU
General Gauge Mediation with Gauge Messengers
Oct 22, Issha Kayo, IPMU
A model independent method to measure velocity
dispersion of galaxies
Oct 22, Romuald Janik, Jagiellonian Univ.
Perturbative gauge theory results from strings in
AdS_5xS5
Oct 27, Bernard de Wit, Utrecht Univ.
Supersymmetric deformations, gauged
supergravities

SeminarsJun 12, Tatsuma Nishioka, Kyoto Univ.
Horava-Lifshitz Holography

Jul 27, Misha Verbitsky, ITEP Moscow/IPMU
Mapping class group for hyperkaehler manifolds

Nov 2, Masaki Shigemori, Univ. Amsterdam
Brownian motion in AdS/CFT
Nov 4, Paul Frampton, UNC and IPMU
3rd lecture: Cyclic Cosmology and Infinite Past
Nov 5, Rong-Gen Cai, Inst.Theo.Phys./ Chongqing
Univ. of Posts and Telecom.
Horizon Thermodynamics and Einstein Equations
Nov 9, Makoto Sakurai, Univ. Tokyo
Differential Graded Categories and heterotic string
theoryNov 10, Horatiu Nastase, Titech
Fuzzy spheres and M2-M5 systems in ABJM
Nov 18, Paul Frampton, UNC and IPMU
4th lecture: Identifying Dark Matter as Black Holes
Nov 19, Marco Drewes, Lausanne
Towards a Quantum Theory of Leptogenesis
Nov 24, Junya Yagi, Rutgers Univ.
Chiral Algebras of (0, 2) Models: Beyond
Perturbation Theory
Nov 24, Alexei A. Starobinsky, Landau Inst./RESCEU
To the local beginning of inflation and beyond
Nov 24, Masato Minamitsuji, Sogang Univ.
Scalar field in the anisotropic Universe
Nov 24, Antonio Enea Romano, YITP
Apparent cosmological acceleration, dark energy
and inhomogeneities

65

Jun 12, Tadashi Takayanagi, IPMU
Holographic Lifshitz-like Fixed Point in String
TheoryNov 27, Dmitry Tamarkin, Northwestern Univ.
Microlocal condition for non-displaceability of
Lagrangian submanifolds

Seminars

Nov 30, Junya Yagi, Rutgers Univ.
Chiral Algebras of (0, 2) Models: Beyond
Perturbation Theory
Dec 1, Jiro Sekiguchi, Tokyo Univ.of Agri. and Tech.
System of uniformization equations andhyperelliptic integrals
Dec 3, Tsz Yan Lam, IPMU
Signature of primordial non-Gaussianity on large
scale structure
Dec 4, Michael Dine, UCSB
Discrete R Symmetries and Low Energy
Supersymmetry66

Dec 4, Yogesh Srivastava, IPMU
Shaving the black holeDec 4, Giovanni Felder, ETH Zurich
Periodic cyclic homology in deformation
quantization
Dec 7, Janet Hung, Perimeter Inst.
Holographic quantum liquids in 1+1 d
Dec 7, Weiping Zhang, Chern Inst. Math. Nankai Univ.
Geometric quantization on noncompact manifolds
Dec 8, Sergey Ketov, Tokyo Met. Univ.
Modified Supersymmetry and Dynamical Dark
EenergyDec 8, Giovanni Felder, ETH Zurich/IPMU
Gaudin subalgebras and stable rational curves
Dec 10, Harald Fritzsch, Univ. Muenchen
Flavor Mixing, Neutrino Masses and Neutrino
Oscillations
Dec 10, Giovanni Felder, ETH Zurich
Deformation quantization and branes
Dec 11, Giovanni Felder, ETH Zurich
Deformation quantization and branes
Dec 14, Surjeet Rajendran, MIT
Gravitational Wave Detection with AtomInterferometry

Dec 28, Shushi Harashita, Kobe Univ.
Remarks on pavings of the Siegel modular
varieties
Jan 08, 2010, Doug Spolyar, Fermilab
Dark Matter and The First stars more
Jan 12, Sumit Das, Kentucky Univ.
Dilation cosmologies and their gauge theory duals
Jan 14, Ken'ichiro Nakazato, Kyoto Univ.
Exploring Hadron Physics in Black Hole
Formations: a New Promising Target of Neutrino
Astronomy
Jan 19, Sergey Galkin, IPMU
Mirror symmetries of P2 enumerated by Markov
triplets
Jan 26, Daniel Krefl, IPMU
Aspects of orientifolds in topological string theory

Feb 17, Masahiro Takada, IPMU
Cosmic structure formation and weak gravitational
lensing

Mar 09, Ryo Suzuki, Trinity Colledge, Dublin
Thermodynamic Bethe Ansatz for Konishi-likestates in AdS_5 x S5

Feb 22, Andrew Tolley, Perimeter Inst.
Non-gaussianities and the Inflationary Initial StateMar 11, Nozomu Kawakatu, Univ. Tsukuba
Fate of young radio-loud AGN: Dead or alive ?

Feb 22, Olaf Scholten, KVI / Groningen
Improved flux limits for neutrinos with energies
above 1022 eV from NuMoon observations

Mar 15, Anthony J. Leggett, Univ. Illinois, UrbanaChampaign
Introduction to High Energy Low Temperature
Physics

Feb 23, Ernesto Lupercio, CINVESTAVNearly Frobenius Structures and Quantum Field
TheoryFeb 25, David Wands, Univ. Portsmouth
Primordial density perturbations from inflation
Mar 02, Robert Penner, Aarhus Univ/USC/Caltech
Finite type invariants and the Ptolemy groupoid
Mar 04, Bernard Carr, Queen Mary Univ. London/
RESCEU
New cosmological constraints on primordial blackholes

Mar 16, Jacopo Stoppa, Cambridge
D0-D6 states counting and Gromov-Witten
invariants
Mar 18, Won-Sang Cho, IPMU
New particle mass spectrometry at the LHC
Mar 25, Zoltan Kunszt, ETH Zurich
Calculating multi-leg one loop amplitudes withunitarity cut method more

Seminars

Nov 26, David Koswer, Saclay
Next-to-Leading Order Jet Physics with BlackHat

Dec 17, Ryuichiro Kitano, Tohoku Univ.
Non-linear SUSY and Hidden Gravity

Jan 28, Masayuki Tanaka, IPMU
The environmental dependence of galaxy
properties at 0<z<2
Jan 28, James M. Lattimer, SUNY
Neutron Stars and the Dense Matter Equation ofState
Feb 01, Timur Sadykov, Siberian Federal Univ.
Bases in the solution space of the Mellin system
Feb 02, Volker Schomerus, DESY
Solving Complex Projective Superspace
Feb 04, Masato Yamanaka, ICRR
Implications of CDMS II result on Higgs sector in
the MSSM
Feb 04, Jing Shu, IPMU
Neutrino Constraints on Inelastic Dark Matter after
CDMS IIFeb 05, Shinsei Ryu, UC Berkeley
Ten-fold classification of topological insulators andsuperconductors
Feb 09, Aya Bamba, Dublin/JAXAThe Next Generation X-ray satellite: ASTRO-H
Feb 11, Nathan Berkovits, Univ. São Paulo
Holography from the AdS_5xS^5 Pure Spinor
FormalismFeb 11, Barton Zwiebach, MIT
T-duality, field theory, and Courant brackets

67

Nov 25, Paul Frampton, UNC and IPMU
5th lecture: Conformality from AdS/CFT at TeV
Scale, Axigluon as Explanation of Top Asymmetryin p-pbar Collisions

Seminars

Conferences

8. Conferences

April 6 - 10
Focus Week: Non-Gaussianities in the Sky

68

May 18 - 22
Focus Week: New Invariants and Wall Crossing
June 22 - 26
International Conference: Dark Energy
September 28 - October 2
Focus Week: Statistical Frontier of Astrophysics
November 6
Workshop: Quantizations, Integrable Systems andRepresentation Theory
November 10 - 13
Focus Week: QCD in Connection with BSM Study at
LHC

November 16 - 18
Workshop: Recent Advances in Mathematics at IPMU
November 30 - December 3
Focus Week: Epoch of Reionization
December 7 - 11
Focus Week: Indirect Dark Matter Search
January 4 - 8
Workshop: Elliptic Fibrations and F-Theory
February 8 - 12
Focus Week: Condensed Matter Physics Meets HighEnergy Physics
March 17 - 19
Workshop: Geometry of Lattices and Infinite
Dimensional Lie Algebra

69

JFY2009

9. Conference Talks(including seminars given at other places)

Conferences

Experiment-Theory Co-Workshop on new physics
search at LHC(2009.04.01 - 2009.04.03, University of Tokyo)
Fuminobu Takahashi"PAMELA/ATIC cosmic-ray anomalies and new
physics"
IPMU Focus week on non- Gaussianities in the Sky(2009.04.06 - 2009.04.10, IPMU)
Fuminobu Takahashi"Non-Gaussianity as a probe of the early universe"
Shinji Mukohyama"Higgs phase of gravity and non-Gaussianity fromghost inflation"

70

Seminar at University of Geneva(2009.04.06, Geneva)
Damien Easson"Searching for the Microphysics of the Inflationary
Universe"
Seminar at NAOJ Mitaka Campus(2009.04.10, Mitaka, Tokyo)
Cosimo Bambi"Super-spinning black holes: is the Kerr bound afundamental limit?"
Non-linear cosmological perturbations(2009.04.13 - 2009.04.24, YITP, Kyoto University)
Shinji Mukohyama"Scale-invariant cosmological perturbations from
Horava-Lifshitz gravity without inflation"
Joint Theory Institute workshop "Dynamics ofSymmetry Breaking"(2009.04.13 - 2009.04.17, Argonne Nat'l Lab, USA)
Shigeki Sugimoto"Dynamical Symmetry Breaking in Holographic
QCD with Orientifolds"
GCOE international workshop "Non-linear
cosmological perturbations"(2009.04.13 - 2009.04.24, Kyoto)
Fuminobu Takahashi"Non-Gaussianity as a probe of the early universe"
Seminar at Space Telescope Science Institute(2009.04.13 - 2009.04.16, STScI, Baltimore)
Ken'ichi Nomoto"Diversity of Core-Collapse Supernovae"
Presented to The Royal Society(2009.04.16, London)
Damien Easson"Modeling the Universe at Low and High Energies"

Seminar at the University of Tokyo(2009.04.23, RESCEU, The University of Tokyo)
Damien Easson"The Microphysics of Inflation"
DECIGO workshop(2009.04.23, NAOJ)
Masahiro Takada"Future dark energy experiments with optical/
infrared surveys"
Seminar at Chuo University(2009.04.27)
Fuminobu Takahashi"Inflation and the implication of non-Gaussianity"

Conference Talks

Seminar at Arizona State University(2009.03.23 - 2009.04.25, Arizona)
Damien Easson"The Microphysics of the Inflationary Universe"

Workshop on Type Ia Supernova Progenitors(2009.04.17 - 2009.04.18, Princeton University)
Ken'ichi Nomoto"Single degenerate models for Type Ia supernova
progenitors"

Seminar at Chiba University(2009.04.27, Chiba, Japan)
Cosimo Bambi"How can we test the Carter-Israel conjecture?"International Workshop: CosmoClusters(2009.05.04 - 2009.05.06, Laboratoired'Astrophysique de Marseille(LAM), France)
Masahiro Takada"Subaru Weak Lens Study of LoCuSS Clusters"
Colloquium at Aoyama Gakuin University(2009.05.08, Kanagawa, Japan)
Cosimo Bambi"Black hole candidates and new physics"
Seminar at Osaka University(2009.05.13, Osaka)
Cosimo Bambi"Testing the black hole paradigm with future
observations of SgrA*"
Seminar at Osaka City University(2009.05.15, Osaka)
Cosimo Bambi"Testing the Carter-Israel Conjecture with future
observations of SgrA*"
Joint Subaru/Gemini Science Conference(2009.05.18 - 2009.05.21, Kyoto University)
Masahiro Takada"LoCuSS: Subaru Weak Lens Study of 30 Galaxy
Clusters"
Ken'ichi Nomoto"The Final Fates of Massive Stars: Theory vs.
Observations"71

JFY2009

Frontiers in Black Hole Physics at Dubna(2009.05.25 - 2009.05.30, JINR, Dubna)
Shinji Mukohyama"Aspects of Horava-Lifshitz cosmology"
Beijing Program on Algebraic Topology 2009(2009.05.25 - 2009.05.29, Chinese Academy of
Sciences)
Toshitake Kohno"Homology of local systems on configuration
spaces and conformal field theory"

72

Planck 2009(2009.05.25 - 2009.05.29, Padova, Italy)
Fuminobu Takahashi"Dark Matter as a probe of the early Universe"
Frascati Workshop 2009: Multi-frequency Behaviour ofHigh Energy Cosmic Sources(2009.05.25 - 2009.05.30, Vulcano, Italy)
Keiichi Maeda"Supernova Nucleosynthesis in the Early and
Present Universe"
Seminar at The University of Tokyo (hadron theory
group)(2009.05.26, Tokyo)
Shigeki Sugimoto"Properties of Baryons in Hologarphic QCD"
Seminar at YITP
(2009.06.02, Kyoto)
Fuminobu Takahashi"Cosmic-ray anomalies as a probe of dark matter"
Seminar at The University of Tokyo (theoreticalastrophysics group)(2009.06.04, Tokyo)
Fuminobu Takahashi"Cosmic-ray anomalies and dark matter"
17th International Conference on Supersymmetry andthe Unification of Fundamental Interactions (SUSY 09)(2009.06.05 - 2009.06.10, Boston)
Seong Chan Park
"Dark Matter and Collider Physics in Split-UED''

KEK mini workshop(2009.06.08 - 2009.06.09, KEK)
Shinji Mukohyama"Aspects of Horava-Lifshitz cosmology"
Seminar at Rikkyo University(2009.06.09, Tokyo)
Cosimo Bambi"Testing the black hole paradigm with future
observations"
Ehrenfest Colloquium(2009.06.10, University of Leiden)
Hirosi Ooguri"Black Holes and Emergent Geometry"
Seminar at the University of Tokyo(2009.06.15, Tokyo)
Shinji Mukohyama"Aspects of Horava-Lifshitz cosmology"
Kaehler and Sasaki geometry in Rome(2009.06.16 - 2009.06.19, University of Rome "La
Sapienza", Rome)Jose Miguel Figueroa-O'Farrill"Einstein manifolds and triple systems"
Conference Solstice(2009.06.17 - 2009.06.19, University of Paris VII)
Toshitake Kohno"Local systems on configuration spaces and thespace of conformal blocks"
Seminar at Tsukuba University(2009.06.17, Tsukuba)
Cosimo Bambi"Testing the black hole paradigm with future
observations of SgrA*"
Seminar at Tohoku University(2009.06.18, Sendai)
Shinji Mukohyama"Aspects of Horava-Lifshitz cosmology"
XXI Rencontres de Blois: Windows on the Universe(2009.06.21 - 2009.06.26, Blois, France)
Cosimo Bambi"Is the Carter-Israel conjecture correct?"Strings 2009(2009.06.22 - 2009.06.26, Rome)
Hirosi Ooguri"Topological Strings and Crystal Melting Revisited"

IPMU international conference "dark energy: lighting
up darkness!"(2009.06.22 - 2009.06.26, IPMU)
Masahiro Takada"LoCuSS: Subaru Weak Lens Study of 30 Galaxy
Clusters"
Shinji Mukohyama"Higgs phase of gravity and ghost condensation"
Ken'ichi Nomoto"Progenitors of Type Ia Supernovae"

CQUeST Focus Program on Horava gravity(2009.07.07 - 2009.07.09, CQUeST, Sogang
University)
Shinji Mukohyama"Aspects of Horava-Lifshitz cosmology"

JEM-EUSO International Workshop(2009.06.22 - 2009.06.23, Ewha Woman's University,
Seoul)
Keiichi Maeda"Hypernovae and Their Progenitors"

Seminar at Tsukuba University(2009.07.08, Tsukuba)
Masahiro Takada"Gravitational lensing of galaxy clusters: dark
matter and dark energy"

Seminar at Nihon University(2009.06.24, Tokyo)
Fuminobu Takahashi"Dark Matter and Cosmic-ray anomalies"

Fireworks workshop 2009(2009.07.13 - 2009.07.17, Bonn, Germany)
Ken'ichi Nomoto"Faint Supernovae from Massive Stars"

Annual Meeting of Presidents of the Association ofPacific Rim Universities(2009.06.28 - 2009.06.30, Caltech, USA)
Hirosi Ooguri"The Global Environment for Research"

Seminar at Tokyo Metropolitan University(2009.07.16, Tokyo)
Shinji Mukohyama"Aspects of Horava-Lifshitz cosmology"

Invisible Universe 2009(2009.06.29 - 2009.07.03, Paris)
Shinji Mukohyama"Higgs phase of gravity and ghost condensate"
Shinji Mukohyama"Aspects of Horava-Lifshitz cosmology"
Current Problems in Extragalactic Dust
(2009.06.29 - 2009.07.03, Niels Bohr Institute)
Takaya Nozawa"Formation and evolution of dust in hydrogenpoor supernovae"
Quantum Criticality and the AdS/CFT Correspondence(2009.06.29 - 2009.07.24, KITP, UC Santa Barbara)
Tadashi Takayanagi"Holographic Entanglement Entropy"
XXV Max Born symposium: the Planck scale(2009.06.29 - 2009.07.03, University of Wroclaw,
Poland)Jose Miguel Figueroa-O'Farrill"M2-branes and 3-algebras"
Field Theory and String Theory(2009.07.06 - 2009.07.11, YITP, Kyoto)
Fuminobu Takahashi"Dark Matter and Cosmic-ray anomalies"
MPA workshop on Type Ia supernovae(2009.07.06 - 2009.07.10, Max-Planck-Institute,
Garching, Germany)
Ken'ichi Nomoto"Unusual Supernovae"

Seminar at Osaka University(2009.07.07, Osaka)
Shinji Mukohyama"Aspects of Horava-Lifshitz cosmology"

Seminar at IoA, The University of Tokyo(2009.07.16, Tokyo)
Masahiro Takada"Gravitational lensing of galaxy clusters: dark
matter and dark energy"
APCTP Focus Program "Aspects of Holography andGauge/string duality"(2009.07.20 - 2009.07.31, POSTECH, Pohang)
Shigeki Sugimoto"O(N) and USp(N) QCD from String Theory"
Quantum Theory and Symmetries 6(2009.07.20 - 2009.07.25, University of Kentucky,
Lexington, USA)
Tadashi Takayanagi"Holographic Entanglement Entropy, Fractional
Quantum Hall Effect, and Lifshitz-like Fixed Points"
Santa Fe 2009 Summer Cosmology Workshop(2009.07.20 - 2009.07.24, Santa Fe, USA)
Masahiro Takada"Theoretical issues in weak lensing"
Seminar at Shizuoka University(2009.07.22, Shizuoka, Japan)
Shinji Mukohyama"Aspects of Horava-Lifshitz cosmology"
Seminar at MPIA
(2009.07.31, Heidelberg, Germany)
Takaya Nozawa"Formation and destruction of dust in Type IIb SN:
Application to Cas A"

Conference Talks

Conference Talks

Seminar at Tokyo Institute of Technology(2009.05.20, Tokyo)
Shinji Mukohyama"Scale-invariant cosmological perturbations from
Horava-Lifshitz gravity without inflation"

Summer School on String Theory(2009.06.06 - 2009.06.19, Galileo Galilei Institute)
Hirosi Ooguri"Topological String Theory"

73

Workshop on tests of gravity and gravitational physics(2009.05.19 - 2009.05.21, Cleveland, USA)
Cosimo Bambi"Super-spinning black holes: motivations andobservational signatures"HMS and Hodge Theory(2009.08.08 - 2009.08.12, University of Vienna)
Sergey Galkin"Apery Class"
IAU Symposium 265 on Chemical Abundances in the
Universe: Connecting First Stars to Planets(2009.08.10 - 2009.08.14, Rio de Janeiro, Brazil)
Ken'ichi Nomoto"Nucleosynthesis of the Elements in Supernovae/
Hypernovae"

74

KITP Conference on Stellar Death and Supernovae(2009.08.17 - 2009.08.21, UC Santa Barbara)
Ken'ichi Nomoto"Single Degenerate Ignition Conditions andConstraints"
KITP Workshop on Particle Acceleration in Astrophysical
Plasmas(2009.08.24 - 2009.09.11, UC Santa Barbara)
Ken'ichi Nomoto"Explosion Energies of Supernovae"
GEOMAPS lecture at Niels Bohr Institute(2009.09.01 - 2009.09.03, Copenhagen)Shigeki Sugimoto"String Theory and QCD (I,II)"
KIAS-KAIST-YITP workshop(2009.09.02, KIAS, Korea)
Fuminobu Takahashi"Dark Matter and Cosmic-rays"

JSPS annual meeting(2009.09.13, Kounan University, Kobe, Japan)
Fuminobu Takahashi"Gravitino Problem and recent development"
Seminar at University of Toronto(2009.09.14, CITA, Toronto)
Shinji Mukohyama"Aspects of Horava-Lifshitz cosmology"
Seminar at Perimeter Institute(2009.09.15, Waterloo, Canada)
Shinji Mukohyama"Aspects of Horava-Lifshitz cosmology"
Shining Light on Black Holes Workshop(2009.09.21 - 2009.09.25, University of Michigan)
Shinji Mukohyama"Ghost condensate and black hole"
NIMS-APCTP Joint International workshop "String
Theory and Cosmology - Quantum Gravity Dark
Energy and Dark Matter"(2009.09.24 - 2009.09.26, Daejeon, Korea)
Seong Chan Park
"Kaluza-Klein Dark Matter"
Shinji Mukohyama"Aspects of Horava-Lifshitz cosmology"
Tadashi Takayanagi"Can we really have string theory duals of nonrelativistic fixed points ?"Damien Easson"Gravitational couplings in DBI inflation"
Statistical Frontiers of Astrophysics(2009.09.28 - 2009.10.02, IPMU)
Masahiro Takada"Non-Gaussian error properties of large-scale
structure probes"

Colloquium at Advanced Technology Center, NAOJ
(2009.09.02, NAOJ, Tokyo)
Masahiro Takada"Gravitational lensing of galaxy clusters: dark
matter and dark energy"

YITP workshop "Branes, Strings and Black holes''(2009.09.28 - 2009.11.01, YITP, Kyoto University)
Tadashi Takayanagi"Holographic Insulator/Superconductor Phase
Transition at Zero Temperature"
Taizan Watari"Flavor Structure in F-theory"

KIAS-KAIST-YITP workshop(2009.09.03, KIAS, Korea)
Seong Chan Park
"Kaluza-Klein Dark Matter"

Lecture series at Nagoya University(2009.09.28 - 2009.09.30, Nagoya)Shinji Mukohyama"Higgs phase of gravity"

KEK school "Galaxy and Dark Matter"(2009.09.28 - 2009.10.02, Karuizawa, Japan)
Fuminobu Takahashi"Dark matter and cosmic-rays"

Seminar at Nagoya University(2009.10.27, Nagoya)
Masahiro Takada"Neutrino mass and cosmology"

Seminar at University of Tokyo(2009.09.28, Tokyo)
Jose Miguel Figueroa-O'Farrill"M2-branes, ADE and Lie superalgebras"

Seminar at Nihon University(2009.10.28)
Shinji Mukohyama"Aspects of Horava-Lifshitz cosmology"

Seminar at Nagoya University(2009.09.29, Nagoya)Shinji Mukohyama"Aspects of Horava-Lifshitz cosmology"

Seminar at National Taiwan University(2009.11.05, Taiwan)
Fuminobu Takahashi"Supersymmetric Cosmology -problems andprospects-"

Seminar at ICRR
(2009.10.09, Kashiwa, Japan)
Masahiro Takada"Neutrino mass and cosmology"

Seminar at National Taiwan University(2009.11.06, Taiwan)
Fuminobu Takahashi"Gravitinos from Inflaton decay"

Seminar at CUHK(2009.10.12, The Chinese University of Hong Kong)
Tsz Yan Lam"Signature of Primordial Non-Gaussianity on Large
Scale Structure"

Seminar at Academia Sinica(2009.11.06, Taiwan)
Fuminobu Takahashi"New gravitino problem"

DENET workshop "Dark universe: from cosmology toplanets"(2009.10.14 - 2009.10.16, Hakone, Japan)
Masahiro Takada"Gravitational lensing and HSC survey"

Gravity at a Lifshitz Point(2009.11.08 - 2009.11.10, Perimeter Institute)Shinji Mukohyama"Cosmological implications of gravity at a Lifshitz
point"

Colloquium at ASIAA(2009.10.15, Taiwan)
Tsz Yan Lam"Signature of primordial non-Gaussianity on large
scale structure"

Seminars at Nat'l Center Theo Sci(2009.11.10 , NCTS, Taiwan)
Fuminobu Takahashi"Dark matter and cosmic-rays"
Fuminobu Takahashi"Affleck-Dine baryogenesis and its recent
development"
Fuminobu Takahashi"Non-Gaussianity as a probe of the early Universe"

Seminar at Hirosaki University(2009.10.15, Hirosaki, Japan)
Shinji Mukohyama"Aspects of Horava-Lifshitz cosmology"
Colloquium at NTHU
(2009.10.16, Taiwan)
Tsz Yan Lam"Signature of primordial non-Gaussianity on large
scale structure"
Galactic Center Workshop 2009(2009.10.19 - 2009.10.23, Shanghai, China)
Cosimo Bambi"Testing the black hole paradigm with future
observations of SgrA*"
Lecture series at Nagoya University(2009.10.26 - 2009.10.28, Nagoya)
Masahiro Takada"Weak gravitational lensing"Tours Symposium on Nuclear Physics and Astrophysics
VII(2009.11.16 - 2009.11.20, Kobe, Japan)
Keiichi Maeda"Nucleosynthesis in Type Ia Supernova Explosions
and Observational Signatures"
Ken'ichi Nomoto"Explosive Nucleosynthesis in Supernovae andHypernovae"
Japan-Korea Science Seminar 2009 (JSPS/KOSEF) -Galaxy Build-Up Across Cosmic Ages andEnvironments -(2009.11.25 - 2009.11.28, Hiraizumi, Japan)
Masahiro Takada"Subaru Weak Lens Study of 30 Galaxy Clusters"

Conference Talks

Conference Talks

Summer Institute 2009(2009.08.04 - 2009.08.06, Fujiyoshida, Japan)
Fuminobu Takahashi"Dark Matter and Cosmic-rays"
Shinji Mukohyama"Aspects of Horava-Lifshitz cosmology"

TAO-NIRCAM Workshop(2009.09.11, Inst. Astronomy, The University of Tokyo,
Mitaka Campus)
Keiichi Maeda"Near-Infrared Frontiers of Supernova Study"

75

The 2nd MSJ-SI "Arrangements of Hyperplanes"(2009.08.01 - 2009.08.13, Hokkaido University)
Toshitake Kohno"Topology of the complements of hyperplanearrangements, local system homology and iterated
integrals"

76

Tropical Structures in Geometry and Physics(2009.11.30 - 2009.12.04, MSRI, Berkeley)
Daniel Krefl"Real enumerative geometry via the topologicalstring"JGRG19(2009.11.30 - 2009.12.04, Rikkyo University, Tokyo)
Cosimo Bambi"Numerical simulations of the accretion process in
Kerr spacetimes with arbitrary value of the Kerr
parameter"

22nd Rironkon Symposium(2009.12.22, Nagoya University)
keiichi maeda"Explosion Geometry of Type Ia Supernovae:
Importance of Late-Time Observations in Opticaland Infrared"
2nd Indo-Japan Workshop on Gravitation &Cosmology(2009.12.29 - 2009.12.30, Jamia Millia Islamia, New
Delhi)
Shinji Mukohyama"Aspects of Horava-Lifshitz cosmology"
Workshop on String Theory(2010.01.05 - 2010.01.06, Rikkyo University)
Shigeki Sugimoto"Mesons as Open Strings"

Mirror Symmetry and Gromov-Witten invariants(2009.12.07 - 2009.12.11, Graduate School ofMathematical Sciences, University of Tokyo)
Yukinobu Toda
"On a computation of rank two DonaldsonThomas invariants"

11th Singularity Workshop(2010.01.09 - 2010.01.11, Shibaura Inst of Tech,
Tokyo)
Cosimo Bambi"Violation of the cosmic censorship conjecture andits astrophysical implications"Lecture Series at Rikkyo University(2009.12.10 - 2009.12.12, Tokyo)
Tadashi Takayanagi"AdS/CFT and its application to condensed matterphysics"

Essential Cosmology for the Next Generation(2010.01.11 - 2010.01.15, Cancun, Mexico)
Masahiro Takada"Lecture 1 "Weak gravitational lensing basics"
Masahiro Takada"Lecture 2 "Cluster weak lensing"
Masahiro Takada"Lecture 3 "Cosmic shear"

SUBARU HSC Science on Variable and Transients(2009.12.14, NCU, Taiwan)
Nozomu Tominaga"Supernova Shock breakouts"
Algebraic Geometry seminar(2009.12.14, Graduate School of Mathematical
Sciences, University of Tokyo)
Sergey Galkin"Invariants of Fano varieties via quantum
D-module"
Miami 2009(2009.12.15 - 2009.12.20, Miami)
Shinji Mukohyama"Aspects of Horava-Lifshitz cosmology"
Lecture Series at Tohoku University(2009.12.16 - 2010.12.18, Sendai)
Tadashi Takayanagi"AdS/CFT and its application to condensed matterphysics"

Open Questions in Gravity Workshop(2010.01.17 - 2010.01.20, Beyond Center, ArizonaState University)
Damien Easson"Extra Dimensions and the CMB"
Seminar at Kyoto University(2010.01.27, Kyoto )Shinji Mukohyama"Aspects of Horava-Lifshitz cosmology"
Inje Gravitation & Numerical Relativity meeting(2010.01.28 - 2010.01.29, Busan, Korea)
Shinji Mukohyama"Aspects of Horava-Lifshitz cosmology"

IPMU Focus Week, Condensed Matter Physics Meets
High Energy Physics(2010.02.08 - 2010.02.12, IPMU)
Tadashi Takayanagi"Entanglement Entropy and Topological Insulatorsfrom String Theory"

XXII Workshop Beyond the Standard Model(2010.03.08 - 2010.03.11, Physikzentrum Bad
Honnef, Germany)
Daniel Krefl"Aspects of the unoriented sector in topologicalstring theory"

The Future of Neutrino Mass Measurements: Terrestrial,
Astrophysical, and Cosmological Measurements in the
Next Decade(2010.02.08 - 2010.02.11, Inst for Nucl Theo, U.
Washington, Seattle)
Masahiro Takada"Neutrino masses and cosmic simulations (invitedreview)"

The First Stars and Galaxies: Challenges for the Next
Decade(2010.03.08 - 2010.03.11, University of Texas, Austin)
Ken'ichi Nomoto"Nucleosynthesis in Hypernovae and Faint
Supernovae"

GUT's and Strings 2010(2010.02.12, MPI Munich)Taizan Watari"Flavor Structure in F-theory"
Komaba 2010(2010.02.13 - 2010.02.14, Komaba Campus, Tokyo)
Hirosi Ooguri"Instability with Chern-Simons Terms"
16th ICEPP Symposium(2010.02.14 - 2010.02.15, Hakuba, Japan)
Shinji Mukohyama"What is cosmology telling us about fundamental
physics?"
Superstring theory and Cosmology(2010.02.18 - 2010.02.20, Konosaki, Japan)
Shigeki Sugimoto"Recent topics in holographic QCD"
Tadashi Takayanagi"An application of Lifshitz fixed points to AdS/CFT"
Exploring Supernova Remnants and Pulsar Wind
Nebulae in X-rays: before and after ASTRO-H(2010.02.18 - 2010.02.19, ISAS/JAXA)
Keiichi Maeda"Tackling Supernova Explosion Mechanism by
Astro-H"

Workshop: Formation and evolution of black holes(2010.02.14 - 2010.02.20, Aspen)
John Silverman"Co-evolution of Supermassive Black Holes andgalaxies in zCOSMOS''HEDLA 2010: 8th International Conference on HighEnergy Density Laboratory Astrophysics(2010.03.15 - 2010.03.18, Caltech, Pasadena)
Ken'ichi Nomoto"Radiation Hydrodynamics of Extremely Brightand Extremely Faint Supernovae"

Conference Talks

Conference Talks

Geometry Seminar at Tokyo Metropolitan University(2009.11.27, Tokyo)
Sergey Galkin"Mirror Symmetry for del Pezzo surfaces"

Joint Seminars on Cosmology and Gravitation(2009.12.18, RESCEU, The University of Tokyo)
Cosimo Bambi"Violation of the cosmic censorship conjecture andits astrophysical implications"Physics of Compact Objects(2010.03.16 - 2010.03.17, Okinawa, Japan)
Keiichi Maeda"Hunting for Type Ia Supernova Explosion
Mechanism"
The non-Gaussian universe(2010.03.24 - 2010.03.26, Kyoto)
Shinji Mukohyama"Aspects of Horava-Lifshitz cosmology and nonGaussianity"
Seminar at MIT(2010.03.25, Cambridge, USA)
Tadashi Takayanagi"Insulators from String Theory"
Seminar at University of Aberdeen(2010.03.25 , Aberdeen)
Sergey Galkin"Degenerations in the mirror''Crete Workshop on the Frontiers of Cosmology(2010.03.28, Crete Center of Theo Phys, Greece)
Shinji Mukohyama"Horava-Lifshitz gravity"
Workshop on Subgroups of Cremona groups(2010.03.29 - 2010.03.30 , Edinburgh)Sergey Galkin"Prokhorov-Hacking degenerations in the mirror''77

AdS/CFT: strongly coupled systems and exact results(2009.11.26 - 2009.11.27, Ecole Normale Supérieure/Institut Henri Poincaréacute, Paris)
Tadashi Takayanagi"Holographic Insulator/Superconductor Phase
Transition at Zero Temperature"S. Petcov, SISSA (Italy), particle theory, 3/20-4/17
A. Bondal, Aberdeen (UK), mathematics, 3/29-4/6
R. Gregory, Durham (UK), string theory, 3/30-4/9
H. Tye, Cornell (USA), particle theory, 3/30-4/3
W. Song, Inst.Theo.Phys.(China), particle theory, 3/30-4/3
F. Urban, UBC (Canada), cosmology, 3/31-4/2
N. Dalal, CITA (Canada), astronomy, 4/6-4/10
E. Komatsu, Texas (USA), cosmology, 4/6-4/10
L. Senatore, IAS (USA), particle theory, 4/6-4/10
B. Wandelt, Illinois (USA), astronomy, 4/6-4/10
D. Bond, CITA (Canada), cosmology, 4/6-4/10
A. Frolov, Simon Fraser (Canada), cosmology, 4/6-4/10
M. Sasaki, Kyoto (Japan), cosmology, 4/6-4/10
T. Takahashi, Saga (Japan), cosmology, 4/6-4/10
T. Tanaka, YITP (Japan), cosmology, 4/6-4/10
S. Yokoyama, Nagoya (Japan), cosmology, 4/6-4/10
K. Kohri, Lancaster (UK), cosmology, 4/6-4/10
Y.R. Garcia, UAN (Columbia), cosmology, 4/6-4/10
R. Crittenden, Portsmouth (UK), cosmology, 4/6 - 4/10
Y. Watanabe, Texas (USA), cosmology, 4/6-4/10
N. Barnaby, CITA (Canada), cosmology, 4/6-4/10
M. Nolta, CITA (Canada), cosmology, 4/6-4/10
J. Sievers, CITA (Canada), cosmology, 4/6-4/10
F. Vernizzi, CEA/Saclay (France), cosmology, 4/6-4/10
G. Rossi, KIAS (Korea), cosmology, 4/6-4/10
A. Curto, Cantabria (Spain), cosmology, 4/6-4/10
P. Vielva, IFCA Cantabria (Spain), cosmology, 4/6-4/10
B. Barreiro, IFCA Cantabria (Spain), cosmology, 4/6-4/10
E. Martinez-Gonzalez, IFCA Cantabria (Spain), cosmology,
4/6-4/10
A.E. Romano, YITP (Japan), cosmology, 4/6-4/10
H.W. Sobel, Irvine (USA), neutrino physics 4/6-4/15
E. Kiritsis, Crete (Greece), cosmology, 4/6-4/10
F. Bernardeau, CEA/Saclay (France), astronomy, 4/7-4/17
U. Seljak, Zurich (Swiss), cosmology, 4/8-4/10
M. Yamaguchi, Tohoku (Japan), particle theory, 4/139/30
J. Hewett, SLAC (USA), particle theory, 4/13-4/15
C. Grojean, CERN (Swiss), particle theory, 4/15-4/15
T. Suyama, Seoul (Korea), cosmology, 4/16-4/16
F. Gmeiner, NIKHEF (Netherlands), string theory, 4/194/25
J.D. Silverman, ETH-Zurich (Swiss), astronomy, 4/20-4/24
Y. Sekino, OIQP (Japan), string theory, 4/21-4/24
T. Higaki, Tohoku (Japan), particle theory, 4/23-4/23
T.E. Milanov, North Carolina State (USA), mathematics,
4/25-4/29
J. Wang, IHEP (China), cosmology, 4/26-4/30
L. Uruchurtu, Cambridge (UK), string theory, 4/28-5/27
M. Smy, Irvine (USA), neutrino physics, 4/28-5/17
Y.B. Ruan, Michigan (USA), mathematics, 5/6-5/13
K. Yoshikawa, Tokyo (Japan), mathematics, 5/8-5/8

M. Yamazaki, Tokyo (Japan), string theory, 5/11-5/29
A. Piepke, Alabama (USA), neutrino physics, 5/12-5/21
T. Suwa, Hokkaido (Japan), mathematics, 5/15-5/15
A. Voronov, Minnesota (USA), mathematics, 5/17-6/4
H. Nakajima, Kyoto RIMS (Japan), mathematics, 5/185/22
K. Fukaya, Kyoto (Japan), mathematics, 5/18-5/22
A. Hanany, Imperial College (UK), string theory, 5/185/22
D. Maulik, Columbia (USA), mathematics, 5/18-5/22
F. Denef, Harvard (USA), string theory, 5/18-5/22
M. Cheng, Harvard (USA), mathematics, 5/18-5/22
B. Szendroi, Oxford (UK), mathematics, 5/18-5/22
G. Mikhalkin, Geneve (Swiss), mathematics, 5/18-5/22
J. Bryan, UBC (Canada), mathematics, 5/18-5/22
Y. Soibelman, Kansas (USA), mathematics, 5/18-5/22
A. Neitzke, Harvard (USA), string theory, 5/18-5/22
T. Dimofte, Caltech (USA), string theory, 5/18-5/22
L. Hollands, Amsterdam (Netherlands), mathematics,
5/18-5/31
S. Naoz, Tel Aviv (Israel), cosmology, 5/18-5/22
J. Yoo, Fermilab (USA), cosmology, 5/20-5/22
P. Binetruy, Paris (France), particle theory, 5/20-5/22
S. Katsanevas, Paris (France), astroparticle phys, 5/215/22
E.L. Turner, Princeton (USA), astrophysics, 5/26-6/11
U.L. Pen, CITA (Canada), astrophysics, 5/28-6/7
K. Smith, Chicago (USA), cosmology, 6/1-6/8
B. Michel, Harvard (USA), particle theory, 6/1-8/15
E.T. Kearns, Boston (USA), neutrino physics, 6/3-6/8
D. Bryman, UBC (Canada), high energy phys, 6/4-6/5
M. Cortes, Sussex (UK), cosmology, 6/4-6/13
G. Giribet, Buenos Aires (Brazil), cosmology, 6/8-6/18
D. Spergel, Princeton (USA), astrophysics, 6/12-6/30
D. Eisenstein, Arizona (USA), astronomy, 6/17-6/25
S. Ho, LBL (USA), cosmology, 6/20-6/30
D. Clowe, Ohio (USA), astronomy, 6/21-6/26
L. Infante, UC (Chile), cosmology, 6/21-6/26
E. Saridakis, Athens (Greece), cosmology, 6/21-6/27
K. Homma, Hiroshima (Japan), high energy phys, 6/216/26
S. Jhingan, Jamia Millia Islamia (India), cosmology, 6/216/26
M. Shoji, Texas (USA), cosmology, 6/21-6/27
L. Hui, Columbia (USA), cosmology, 6/21-6/25
I. Gurwich, Ben-Gurion (Israel), cosmology, 6/21-6/27
S. Majumdar, TIFR (India), cosmology, 6/21-6/26
J. Jee, UC Davis (USA), astronomy, 6/21-6/27
M.S. Alam, Texas (USA), high energy physics, 6/21-6/27
Y. Fujii, Waseda (Japan), astronomy, 6/21-6/25
T. Shiromizu, Kyoto (Japan), string theory, 6/22-6/27
K. Mizutani, Saitama/Waseda (Japan), astrophysics, 6/226/26
A. Nishizawa, Tohoku (Japan), astronomy, 6/22-6/26

79

78

Conference Talks

JFY2009

Visitors

10. Visitors

Y. Tachikawa, Princeton (USA), string theory, 10/310/10
M.H. Crocce, ICE (Spain), cosmology, 10/4-10/13
S.R. Sanchez, DESY (Germany), particle theory, 10/410/10
R. Janik, Jagiellonian (Poland), particle theory, 10/811/16
A. Bondal, Aberdeen (UK), mathematics, 10/9-11/30
S. Zheng, Zhejiang (China), string theory, 10/1010/25
E. Mendez-Escobar, Edinburgh (UK), mathematicalPhys, 10/10-12/9
Z. Bajnok, Hungarian Acad.sci. (Hungary), string
theory, 10/13-11/14
M. Kontsevich, IHES (France), mathematics, 10/1510/16
M. Pevzner, Reims (France), mathematics, 10/1711/24
B.Q.P.J. de Wit, Utrecht (Netherlands), atomic phys,
10/18-11/7
A. Nishizawa, Tohoku (Japan), astronomy, 10/1910/21
I. Fleck, Siegen (Germany), particle theory, 10/2211/18
T. Ishibe, Hiroshima (Japan), mathematics, 10/3011/1
P. Zograf, Steklov (Russia), mathematics, 11/1-11/29
H. Minamoto, Kyoto (Japan), mathematics, 11/1-11/3
O. Iyama, Nagoya (Japan), mathematics, 11/1-11/3
S. Oppermann, NTNU (Norway), mathematics, 11/111/3
C. Schmidt-Colinet, ETH-Zurich (Swiss), string theory,
11/2-2010/10/31
M. Shigemori, Amsterdam (Netherlands), string
theory, 11/2-11/6
Y. Sekiya, Nagoya (Japan), mathematics, 11/2-11/3
M. Smy, Irvine (USA), neutrino phys, 11/3-11/16
R.G. Cai, Chongqing (China), cosmology, 11/5-11/5
G. Heckman, Radboud U Nijmegen (Netherlands),
mathematics, 11/5-11/6
H. Iritani, Kyushu (Japan), mathematics, 11/5-11/6
C. Olmos, Cordoba (Spain), mathematics, 11/5-11/6
D.H. Sternheimer, Bourgogne (France), mathematics,
11/5-11/6
M. Guest, Tokyo Met. (Japan), mathematics, 11/511/6
A. Rosly, ITEP (Russia), mathematics, 11/6-11/30
E.T. Kearns, Boston (USA), neutrino phys, 11/7-11/17
D. Krohn, Princeton (USA), particle theory, 11/811/14
G. Salam, Paris/CNRS (France), particle theory, 11/811/14
M. Schwartz, Harvard (USA), particle theory, 11/811/15

G. Zanderighi, Oxford (UK), particle theory, 11/8-11/15
P. Fox, Fermilab (USA), particle theory, 11/8-11/14
T. Logvinenko, Liverpool (UK), mathematics, 11/8-11/22
J. Alwall, SLAC (USA), particle theory, 11/9-11/14
R. Cavanaugh, Illinois-Chicago Circle (USA), particle
theory, 11/9-11/15
L. Dixon, SLAC (USA), particle theory, 11/9-11/13
J. Gallicchio, Harvard (USA), particle theory, 11/9-11/14
W.S. Cho, Seoul (Korea), particle theory, 11/9-11/14
I. Lewis, Wisconsin (USA), particle theory, 11/9-11/13
Z. Kunszt, ETH-Zurich (Swiss), particle theory, 11/9-11/14
K. Mawatari, Heidelberg (Germany), particle theory,
11/9-11/14
H. Yokoya, CERN (Swiss), particle theory, 11/9-11/15
Q. Li, Karlsrue (Germany), particle theory, 11/9-11/14
R. Frederix, Zurich (Swiss), particle theory, 11/9-11/16
C. Yu, Korea (Korea), particle theory, 11/9-11/16
S. Lee, Weizmann Inst (Israel), particle theory, 11/9-11/14
C. Young, Kyoto (Japan), particle theory, 11/9-11/10
S. Asai, Tokyo (Japan), high energy physics, 11/10-11/13
K. Choi, KAIST (Korea), particle theory, 11/10-11/14
H. Nastase, Titech (Japan), particle theory, 11/10-11/10
H. Nishino, Nagoya (Japan), particle theory, 11/10-11/13
C.W. Chiang, Taiwan Inst Phys (Taiwan), particle theory,
11/10-11/13
C.W. Walter, Duke (USA), neutrino physics, 11/10-11/16
N.J. Berkovits, Estadual Paulista (Brasil), string theory,
11/10-11/12
J. Thaler, Berkeley (USA), particle theory, 11/10-11/13
P. Bressler, Max Planck (Germany), mathematics, 11/1112/2
K. Scholberg, Duke (USA), neutrino physics, 11/11-11/16
T. Ishibe, Hiroshima (Japan), mathematics, 11/13-11/15
N. Yuichi, Tohoku (Japan), mathematics, 11/15-11/17
C. Ingalls, New Brunswick (Canada), mathematics, 11/1711/18
M. Drewes, Lausanne (Swiss), particle theory, 11/1911/19
J.M. Escude, Barcelona (Spain), astrophysics, 11/21-12/4
D. Kosower, CEA-Saclay (France), particle theory, 11/2212/6
M. Minamitsuji, Sogang (Korea), cosmology, 11/23-11/28
C. Kobayashi, ANU (Australia), astronomy, 11/23-12/6
J. Yagi, Rutgers (USA), particle theory, 11/24-11/24
A.E. Romano, Kyoto (Japan), cosmology, 11/24-11/25
D. Tamarkin, Northwestern (USA), mathematics, 11/2712/17
M. McQuinn, Berkeley (USA), astrophysics, 11/28-12/4
I. Iliev, Sussex (UK), astronomy, 11/28-12/3
X. Chen, Nat'l Astr. Obs. (China), astronomy, 11/29-12/6
B. Yue, Nat'l Astr. Obs. (China), astronomy, 11/29-12/3
A. Coley, Dalhousie (Canada), mathematics, 11/29-12/13
T. Yamada, Tohoku (Japan), astronomy, 11/29-12/3
G. Becker, Cambridge (UK), astrophysics, 11/29-12/5

Visitors

D.R. Morrison, UCSB (USA), mathematics, 8/17-9/1
S. Kahn, SLAC (USA), cosmology, 8/17-8/19
Y.K. Kim, Chicago/Fermilab (USA), high energy physics,
8/17-8/19
D. Ida, Gakushuin (Japan), cosmology, 8/17-8/21
A. Bondal, Aberdeen (UK), mathematics, 8/18-9/3
M. Gonokami, Tokyo (Japan), quantum optics, 8/18-8/18
N. Kaifu, Open U (Japan), astronomy, 8/18-8/18
S. Kojima, Titech (Japan), mathematics, 8/18-8/18
H. Ohta, Nagoya (Japan), mathematics, 8/19-8/20
G. Grantcharov, Maryland (USA), mathematics, 8/21-8/27
C.S. Park, Caltech (USA), string theory, 8/24-8/31
M.S. Shin, Princeton (USA), astrophysics, 8/24-8/26
H.N. Li, Inst. Phys (Tanwan), particle theory, 8/24-8/25
M. Yamazaki, Tokyo (Japan), string theory, 8/24-8/28
D. Kawata, Univ College (UK), astronomy, 8/25-8/25
P. Zinn-Justin, Pierre et Marie Curie (France), mathematics,
8/28-8/28
M. Yamazaki, Tokyo (Japan), string theory, 8/31-9/3
B. Webber, Cambridge (UK), particle theory, 9/1-9/30
S. Freedman, Berkeley (USA), neutrino physics, 9/5-9/11
T. Oshima, Tokyo (Japan), mathematics, 9/8-9/8
M. Hashimoto, W.Ontario (Canada), particle theory, 9/89/8
T. Ishibe, Hiroshima (Japan), mathematics, 9/11-9/13
M. Hashimoto, W.Ontario (Canada), particle theory, 9/149/14
P. Zograf, Steklov Inst (Russia), mathematics, 9/15-9/24
H. Iritani, Kyushu (Japan), mathematics, 9/17-9/19
M. Strauss, Princeton (USA), astrophysics, 9/23-9/30
R. Lupton, Princeton (USA), cosmology, 9/23-9/30
C. Loomis, Apache Point Obs. (USA), cosmology, 9/239/30
E.L. Turner, Princeton (USA), astrophysics, 9/24-0/10
I. Szapudi, Hawaii (USA), astronomy, 9/26-10/5
H. Peiris, Univ College (UK), astrophysics, 9/26-10/3
D. Mortlock, Imperial college (UK), astrophysics, 9/2710/3
J.A. Rice, Berkeley (USA), mathematics, 9/27-10/3
C.M. Schafer, Carnegie Mellon (USA), mathematics, 9/2710/3
D. Marinucci, Tor Vergata (Italy), mathematics, 9/27-10/3
X.L. Meng, Harvard (USA), mathematics, 9/27-10/1
J. Winn, MIT (USA), astrophysics, 9/27-10/3
P. Baines, Harvard (USA), mathematics, 9/27-10/2
J. Frost, cambridge (UK), high energy physics, 9/2710/11
D. Savransky, Princeton (USA), astronomy, 9/27-10/3
T.J. Loredo, Cornel (USA), astronomy, 9/27-10/3
D.W. Hogg, New York U (USA), astronomy, 9/28-10/2
R. Shibata, Keio (Japan), mathematics, 9/28-10/2
P.F. de Medeiros, Edinburgh (UK), mathematical Phys,
10/1-12/24
D.H. Diaz, Madrid (Spain), student exchange, 10/2-1/2

81

Visitors
80

S. Ichinose, Shizuoka (Japan), particle theory, 6/22-6/26
K. Bamba, Tsing Hua (Taiwan), cosmology, 6/22-6/26
H. Miyatake, Tokyo (Japan), cosmology, 6/22-6/26
T. Kobayashi, Waseda (Japan), cosmology, 6/22-6/26
H. Motohashi, Tokyo RESCEU (Japan), cosmology, 6/226/26
T. Moriya, Tokyo (Japan), astronomy, 6/22-6/26
S. Tsujikawa, TU Science (Japan), cosmology, 6/22-6/26
Y.C.M. Li, Tsing Hua (Taiwan), cosmology, 6/22-6/27
T. Chiba, Nihon (Japan), cosmology, 6/22-6/26
Y. Urakawa, Waseda (Japan), cosmology, 6/22-6/26
D. Jeong, Texas (USA), cosmology, 6/22-6/26
S. Saito, Tokyo (Japan), cosmology, 6/22-6/26
M. Kasai, Hirosaki (Japan), cosmology, 6/22-6/26
T. Nishimichi, Tokyo (Japan), astronomy, 6/22-6/26
A. Taruya, Tokyo RESCEU (Japan), astrophysics, 6/22-6/26
M. Nakashima, Tokyo RESCEU (Japan), astrophysics,
6/22-6/26
Y. Kamiya, Tokyo (Japan), astronomy, 6/22-6/26
M. Sumiyoshi, Kyoto (Japan), astrophysics, 6/22-6/26
M. Turner, Chicago (USA), cosmology, 6/22-6/25
L. Amendola, Astr.Obs.Rome (Italy), astronomy, 6/226/27
J.A. Gu, NTU (Taiwan), cosmology, 6/23-6/26
C.S. Kim, Yonsei (Korea), particle theory, 6/23-8/31
K.W. Ng, ASIAA (Taiwan), astrophysics, 6/24-7/2
T. Ishibe, Hiroshima (Japan), mathematics, 6/26-6/28
K. Nagao, Kyoto RIMS (Japan), mathematics, 6/30-7/2
N. Suzuki, Berkeley (USA), astrophysics, 7/7-7/11
M. Verbitsky, ITEP (Russia), mathematics, 7/8-9/4
M. Takeuchi, Tokyo ICRR (Japan), particle theory, 7/9-7/9
R. Nishio, Tokyo (Japan), particle theory, 7/13-7/15
M. Gaberdiel, ETH-Zurich (Swiss), mathematics, 7/137/17
K. Ioka, KEK (Japan), particle theory, 7/15-7/15
I. Runkel, King's College (UK), string theory, 7/21-7/21
B. Nienhuis, Amsterdam (Netherlands), particle theory,
7/22-7/26
Y. Niinou, Kyoto (Japan), astrophysics, 7/23-7/24
I. Low, Argon/Northwestern (USA), particle theory, 7/318/22
F.G. Malikov, USC (USA), mathematics, 8/1-8/19
T. Arakawa, Nara (Japan), mathematics, 8/3-8/31
N. Dorey, Cambridge (UK), high energy physics, 8/5-8/7
K. Ota, RIKEN (Japan), astronomy, 8/5-8/5
H. Yamaguchi, RIKEN (Japan), astronomy, 8/6-8/6
J. Ellis, CERN (Swiss), particle theory, 8/8-8/19
H.S. Goh, Maryland (USA), particle theory, 8/9-8/23
N. Xi, Chinese Acad.Sci. (China), mathematics, 8/9-8/12
S. Maeda, Kyoto (Japan), cosmology, 8/11-8/12
K. Naoi, Tokyo (Japan), mathematics, 8/13-8/13
B. Feldstein, Boston (USA), particle theory, 8/16-8/31
N. Reshetikhin, Berkeley (USA), mathematics, 8/16-8/20
R. Peccei, UCLA (USA), particle theory, 8/16-8/19

I. Fialkovskiy, St. Petersburg State U (Russia), particle
theory, 02/07-02/12
H. C. Kao, Natl. Taiwan Normal U (Taiwan), string theory,
02/07-02/12
F. L. Lin, NTNU (Taiwan), string theory, 02/07-02/12
A. Garcia-Garcia, Lisbon (Portugal), string theory, 02/0702/12
P. Koroteev, Minnesota (USA), cosmology, 02/07-02/12
D. K. Hong, Pusan (Korea), particle theory, 02/07-02/13
X. G. Wen, MIT (USA), condensed matter, 02/08-02/12
E. Fradkin, Illinois (USA), mathematical phys, 02/0802/13
S. Fujimoto, Kyoto (Japan), condensed matter, 02/0802/11
J. Trump, Arizona (USA), astronomy, 02/08-02/09
S. Zhang, Stanford (USA), condensed matter,
02/0902/10
A. Bamba, JAXA (Japan), astronomy, 02/09-02/09
B. Zwiebach, MIT (USA), string theory, 02/10-02/12
N. Berkovits, São Paulo (Brazil), string theory, 02/1002/12
T. Ishibe, Hiroshima (Japan), mathematics,02/12-02/14
B. Burton, Queensland (Australia), mathematics, 02/1302/21
R. Budney, Victoria (Canada), mathematics, 02/13-02/21
T. Okuda, Perimeter Inst (Canada), string theory, 02/1402/17
T. Kugo, Kyoto (Japan), particle theory, 02/22-03/31
K. Ichiki, Nagoya (Japan), cosmology, 02/22-02/24
D. Wands, Portsmouth (UK), cosmology, 02/23-02/26
E. Lupercio, Cinvestav (Mexico), mathematics, 02/2302/23
X. F. Wang, Tsinghwa (China), particle theory, 02/2502/28
C. Kobayashi, Australian Natl U (Australia), astronomy,
02/26-03/06

R. Penner, southern Cal (USA), mathematics, 02/28-03/06
T. Okamoto, Tsukuba (Japan), cosmology, 03/01-03/03
J. Fonseca, Portsmouth (UK), cosmology, 03/02-03/02
B. Carr, QMUL (UK), cosmology, 03/04-03/04
T. Ishibe, Hiroshima (Japan), mathematics, 03/04-03/07
J. Schmidt, DESY (Germany), particle theory, 03/07-05/08
C. Weniger, DESY (Germany), particle theory, 03/0705/08
R. Suzuki, Cambridge (UK)), string theory, 03/08-03/10
R. Jimenez, Barcelona (Spain), astronomy, 03/08-03/29
L. Verde, Barcelona (Spain), astronomy, 03/08-03/29
B. Venkov, Steklov Inst (Russia), mathematics, 03/0804/15
S. Petcov, SISSA (Italy), particle theory, 03/10-04/13
N. Kawakatu, NAOJ (Japan), astronomy, 03/11-03/11
N. Scheithauer, Darmstadt Tech (Germany), mathematics,
03/13-03/18
Z. Kunszt, ETH Zurich (Switzerland), particle theory,
03/15-05/15
A. J. Leggett, Illinois (USA), condensed matter theory,
03/15-03/15
J. Stoppa, Cambridge (UK), mathematics, 03/15-03/16
T. Ishibe, Hiroshima (Japan), mathematics, 03/16-03/19
S. Kondo, Nagoya (Japan), mathematics, 03/17-03/19
H. Aoki, Tokyo U of Sci. (Japan), mathematics, 03/1703/19
D. Sternheimer, Bourgogne (France), mathematics,
03/17-03/17
J. Sekiguchi, Tokyo A&T (Japan), mathematics, 03/1803/18
C. Beil, Santa Barbara (USA), mathematics, 03/24-06/18
T. O'Donnell, Berkeley (USA), neutrino physics, 03/2706/25
M. Ratz, Tech U Munich (Germany), particle theory,
03/28-04/02

Visitors

D. Morrison, Santa Barbara (USA), mathematics, 01/0201/09
J. Marsano, Enrico Fermi Inst. (USA), mathematics, 01/0201/10
A. Grassi, Pennsylvania (USA), mathematics, 01/02-01/09
A. Bondal, Aberdeen (UK), mathematics, 01/02-01/11
S. Schafer-Nameki, KITP (USA), mathematics, 01/0301/09
S. Katz, Illinois (USA), mathematics, 01/03-01/09
C. Cordova, Harvard (USA), mathematics, 01/03-01/11
J. Heckman, Princeton (USA), mathematics, 01/03-01/09
J. H. Oh, Kentucky (USA), string theory, 01/04-01/12
N. Nakayama, Kyoto (Japan), mathematics, 01/04-01/08
T. Shioda, Rikkyo (Japan), mathematics, 01/04-01/08
Y. Miyaoka, Tokyo (Japan), mathematics, 01/04-01/08
M. Saito, Kobe (Japan), mathematics, 01/04-01/08
T. Kawano, Tokyo (Japan), mathematics, 01/04-01/08
D. Spolyar, Fermilab (USA), cosmology, 01/06-01/14
M. Wolk, Paris 6 (France), cosmology, 01/10-02/26
T. Ishibe, Hiroshima (Japan), mathematics, 01/10-01/12
R. Lupton, Princeton (USA), cosmology, 01/12-01/23
K. Nakazato, Kyoto (Japan), astronomy, 01/14-01/14
E. Turner, Princeton (USA), astrophysics, 01/15-01/30
S. Bickerton, Princeton (USA), cosmology, 01/16-01/29
C. Loomis, Princeton (USA), cosmology, 01/16-01/29
A. Bondal, Aberdeen (UK), mathematics, 01/20-01/24
X. G. He, NTU (Taiwan), particle theory, 01/21-02/10
J. Lattimer, Stony Brook (USA), astronomy, 01/28-01/31
V. Schomerus, DESY (Germany), string theory, 01/3002/19
Y. Hikida, Keio (Japan), string theory, 02/01-02/13
M. Ooguri, KIPAC (USA), cosmology, 02/01-02/04
G. Smoot, Berkeley (USA), astrophysics, 02/03-03/01
S. Ryu, Berkeley (USA), condensed matter, 02/04-02/13
M. Yamanaka, Saitama (Japan), particle theory, 02/0402/04
S. Hartnoll, Harvard (USA), condensed matter phys,
02/07-02/13
N. Read, Yale (USA), applied math, 02/07-02/13
D. T. Son, Washington (USA), particle theory, 02/07-02/11
S. Kachru, KITP (USA), string theory, 02/07-02/12
S. Minwalla, TIFR (India), string theory, 02/07-02/13
H. Liu, MIT (USA), string theory, 02/07-02/13
E. Kiritsis, Crete (Greece), cosmology, 02/07-02/13
A. Kitaev, Caltech (USA), string theory, 02/07-02/13
A. Yarom, Princeton (USA), condensed matter, 02/0702/12
C. Keeler, Harvard (USA), cosmology, 02/07-02/13
R. Meyer, Crete (Greece), string theory, 02/07-02/13
D. Hofman, Harvard (USA), string theory, 02/07-02/13
S. Kim, Seoul (Korea), particle theory, 02/07-02/12
P. Nag, TIFR (India), string theory, 02/07-02/13
M. Cheng, Harvard (USA), mathematics, 02/07-02/12

83

Visitors
82

G. Mellema, Stockholm (Sweden), astronomy, 11/29-12/3
S. Zaroubi, Groningen (Netherlands), astrophysics, 11/2912/9
L.V.E. Koopmans, Groningen (Netherlands), cosmology,
11/29-12/3
A. Lidz, Harvard (USA), astronomy, 11/29-12/3
U.L. Pen, CITA (Canada), astrophysics, 11/29-12/6
H. Tashiro, IAS (USA), cosmology, 11/29-12/3
K.W. Ng, ASIAA (Taiwan), astrophysics, 11/29-12/3
S.R. Das, Kentucky (USA), string theory, 11/30-2010/3/3
J.H. Oh, Kentucky (USA), string theory, 11/30-12/22
N. Kashikawa, NAOJ (Japan), astronomy, 11/30-12/2
L.J. Greenhill, Harvard (USA), astrophysics, 11/30-12/3
V. Jelic, Groningen (Nethernlands), astrophysics, 11/3012/3
J. Sekiguchi, Tokyo A&T (Japan), mathematics, 11/3012/1
T. Ishibe, Hiroshima (Japan), mathematics, 11/30-12/2
G. Felder, ETH-Zurich (Swiss), mathematics, 12/2-12/19
P. Hut, IAS (USA), astrophysics, 12/3-2010/1/18
C.W. Walter, Duke (USA), neutrino physics, 12/3-12/14
A.E. Taklimi, IPM (Iran), particle theory, 12/4-12/13
Q. Yuan, IHEP (China), astrophysics, 12/5-12/20
J. Hung, Perimeter Inst (Canada), string theory, 12/512/14
P.F. Yin, Peking (China), astrophysics, 12/5-12/20
S. Rajendran, MIT (USA), particle theory, 12/6-12/15
P. Mertsch, Edinburgh (UK), particle theory, 12/6-12/12
D. Hooper, Fermilab (USA), particle theory, 12/6-12/12
A. Ibarra, TUM (Germany), particle theory, 12/6-12/12
P.D. Serpico, CERN (Swiss), astrophysics, 12/6-12/13
P. Gondolo, Utah (USA), cosmology, 12/6-12/12
C. Rott, Ohio State (USA), astrophysics, 12/6-12/12
K. Hirotani, ASIAA (Taiwan), astrophysics, 12/6-12/12
Y.G. Kim, KAIST (Korea), particle theory, 12/6-12/12
L. Visinelli, Utah (USA), particle theory, 12/6-12/12
O. Seto, Hokkai-Gakuen (Japan), particle theory, 12/612/11
A. Strumia, Pisa (Italy), particle theory, 12/6-12/13
X.J. Bi, IHEP (China), particle theory, 12/6-12/12
M. Casolino, INFN (Italy), particle theory, 12/7-12/11
S. Torii, Waseda (Japan), particle theory, 12/7-12/8
M. Hoshino, Tokyo (Japan), particle theory, 12/7-12/11
T. Jeltema, Santa Cruz (USA), astronomy, 12/8-12/12
S. Ketov, Tokyo Met. (Japan), cosmology, 12/8-12/8
S. Profumo, Santa Cruz (USA), particle theory, 12/8-12/12
H. Fritzsch, Muenchen (Germany), particle theory, 12/1012/10
M. Gleiser, Dartmouth (USA), particle theory, 12/13-12/15
R. Kitano, Tohoku (Japan), particle theory, 12/17-12/17
R. Donagi, Pennsylvania (USA), mathematics, 12/252010/1/9
T. Pantev, Pennsylvania (USA), mathematics, 2010/01/0201/15

11. Publications

84

Visitors

The r-Process in Supersonic Neutrino-driven
Winds: The Role of the Wind Termination Shock,Kuroda, T., Wanajo, S., and Nomoto, K.,
Astrophys. J. 672, 1068 (2008)
How Much 56Ni Can Be Produced in Core-Collapse
Supernovae? Evolution and Explosions of 30–100
M ○・ Stars,
Umeda, H. and Nomoto, K.,
Astrophys. J. 673, 1014 (2008)
Asphericity in Supernova Explosions from LateTime Spectroscopy,
Keiichi Maeda, Koji Kawabata, Paolo A. Mazzali,
Masaomi Tanaka, Stefano Valenti, Ken'ichi Nomoto,Takashi Hattori, Jinsong Deng, Elena Pian, Stefan
Taubenberger, Masanori Iye, Thomas Matheson, Alexei
V. Filippenko, Kentaro Aoki, George Kosugi, Youichi
Ohyama, Toshiyuki Sasaki, Tadafumi Takata,
Science 319, 1220 (2008), IPMU 08-003

A hybrid method for determining SUSY particle
masses at the LHC with fully identified cascadedecays,Mihoko M. Nojiri , Giacomo Polesello, Daniel R. Tovey,
JHEP 05, 014 (2008), IPMU07-0008
Probing reheating temperature of the universe
with gravitational wave background,
Kazunori Nakayama, Shun Saito, Yudai Suwa, Jun'ichi
Yokoyama,
JCAP 06, 020 (2008), IPMU08-0122
Determining the mass of a ultra-light gravitino at
LHC,
K. Hamaguchi, S. Shirai, and T.T. Yanagida,
Phys. Lett. B 663, 86 (2008), IPMU07-0015
Chemical Abundances of the Secondary Star in theBlack Hole X-ray Binary XTE J1118+480,
Jonay I. Gonzalez Hernandez, Rafael Rebolo, Garik
Israelian, Alexei V. Filippenko, Ryan Chornock,Nozomu Tominaga, Hideyuki Umeda, and Ken'ichi
Nomoto,Astrophys. J. 679, 732 (2008), IPMU08-0005

The broad-lined Type Ic supernova 2003jd,
Valenti, S., Benetti, S., Cappellaro, E., Patat, F., Mazzali,P., Turatto, M., Hurley, K., Maeda, K., Gal-Yam, A.,
Foley, R. J., Filippenko, A. V., Pastorello, A., Challis,P., Frontera, F., Harutyunyan, A., Iye, M., Kawabata,K., Kirshner, R. P., Li, W., Lipkin, Y. M., Matheson,T., Nomoto, K., Ofek, E. O., Ohyama, Y., Pian, E.,
Poznanski, D., Salvo, M., Sauer, D. N., Schmidt, B. P.,
Soderberg, A., and Zampieri, L.,
MNRAS 383, 1485 (2008)

Constraints on scalar-tensor models of dark energy
from observational and local gravity tests,
Shinji Tsujikawa, Kotub Uddin, Shuntaro Mizuno, Reza
Tavakol, Jun'ichi Yokoyama,
Phys. Rev. D 77, 103009 (2008), IPMU08-0119

Phase diagram of nuclear ``pasta'' and its
uncertainties in supernova cores,
Hidetaka Sonoda, Gentaro Watanabe, Katsuhiko Sato,
Kenji Yasuoka, Toshikazu Ebisuzaki,
Phys. Rev. C 77, 035806 (2008), IPMU07-0006

Single-field inflation, anomalous enhancement ofsuperhorizon fluctuations, and non-Gaussianity inprimordial black hole formation,
Ryo Saito, Jun'ichi Yokoyama, Ryo Nagata,
JCAP 06, 024 (2008), IPMU08-0123

Towards a Categorical Construction of Lie
Algebras,
Kyoji Saito,
Advanced Studies in Pure Mathematics 50, 101 (2008),
IPMU09-0015

Young and Massive Binary Progenitors of Type Ia
Supernovae and Their Circumstellar Matter,
Izumi Hachisu, Mariko Kato, and Ken'ichi Nomoto,
Astrophys. J. 679, 1390 (2008), IPMU07-0010

JFY2008
The Outermost Ejecta of Type Ia Supernovae,
Masaomi Tanaka, Paolo A. Mazzali, Stefano Benetti,
Ken'ichi Nomoto, Nancy Elias-Rosa, Rubina Kotak,
Giuliano Pignata, Vallery Stanishev, Stephan
Hachinger,
Astrophys. J. 677, 448 (2008), IPMU07-0018

Publications

nu-Process Nucleosynthesis in Population III CoreCollapse Supernovae,
Takashi Yoshida, Hideyuki Umeda, and Ken'ichi
Nomoto,Astrophys. J. 672, 1043 (2008), IPMU07-0009

Moduli stabilization in stringy ISS models,Yu Nakayama, M. Yamazaki, T. T. Yanagida,
Phys. Lett. B 663, 281 (2008), IPMU 07-0001

Decaying D-branes and Moving Mirrors,
Tomoyoshi Hirata, Shinji Mukohyama and Tadashi
Takayanagi,
JHEP 05, 089 (2008), IPMU08-0016

Inclusive transverse mass analysis for squark andgluino mass determination,
Mihoko M. Nojiri, Yasuhiro Shimizu, Shogo Okada,Kiyotomo Kawagoe,
JHEP 06, 035 (2008), IPMU08-0006

85

JFY2007

Test of Anomaly Mediation at the LHC,
Shoji Asai, Takeo Moroi, T.T. Yanagida,
Phys. Lett. B 664, 185 (2008), IPMU08-0009
Delayed pulsar kicks from the emission of sterile
neutrinos,
Alexander Kusenko, Bhabani Prasad Mandal, Alok
Mukherjee,
Phys. Rev. D 77, 123009 (2008), IPMU09-0155

86Electromagnetic Properties of the Early Universe,
Keitaro Takahashi, Kiyotomo Ichiki, Naoshi Sugiyama,
Phys. Rev. D 77, 124028 (2008), IPMU07-0016
Upperbound on Squark Masses in GaugeMediation Model with Light Gravitino,
Junji Hisano, Minoru Nagai, Shohei Sugiyama, and T. T.
Yanagida,
Phys. Lett. B 665, 237 (2008), IPMU08-0021
Extremal C=(2,2) 2D Conformal Field Theories andConstraints of Modularity,
Matthias R. Gaberdiel, Sergei Gukov, Christoph A.
Keller, Gregory W. Moore, and Hirosi Ooguri,
Communications in Number Theory and Physics 2,
743 (2008), IPMU08-0031
Metastable Vacua in Perturbed Seiberg-Witten
Theories, Part 2: Fayet-Iliopoulos Terms and Kahler
Normal Coordinates,
Joseph Marsano, Hirosi Ooguri, Yutaka Ookouchi,
Chang-Soon Park,
Nucl. Phys. B 798, 17 (2008), IPMU 07-0003
The Peculiar Type Ib Supernova 2006jc: A WCO
Wolf-Rayet Star Explosion,
N. Tominaga, M. Limongi, T. Suzuki, M. Tanaka,
K. Nomoto, K. Maeda, A. Chieffi, A. Tornambe, T.
Minezaki, Y. Yoshii, I. Sakon, T. Wada, Y. Ohyama, T.
Tanabe, H. Kaneda, T. Onaka, T. Nozawa, T. Kozasa,
K. S. Kawabata, G. C. Anupama, D.K. Sahu, U.K.
Gurugubelli, T.P. Prabhu, and J. Deng,
Astrophys. J. 687, 1208 (2008), IPMU07-0012
Quantum Interference Effects Among Helicities at
LEP-II and Tevatron,
Matthew R. Buckley, Beate Heinemann, William
Klemm, and Hitoshi Murayama,
Phys. Rev. D 77, 113017 (2008), IPMU08-0017

Affleck Dine leptogenesis via multiple flat
directions,Kohei Kamada, Jun'ichi Yokoyama,
Phys. Rev. D 78, 043502 (2008), IPMU08-0120
Solar neutrino measurements in SuperKamiokande-II,
The Super-Kamiokande Collaboration,
Phys. Rev. D 78, 032002 (2008)
New Aspects of Heterotic-F Theory Duality,
Hirotaka Hayashi, Radu Tatar, Yukinobu Toda, Taizan
Watari, and Masahito Yamazaki,
Nucl. Phys. B 806, 224 (2008), IPMU08-0024
Inflation at the GUT scale in a Higgsless universe,
Nemanja Kaloper, Lorenzo Sorbo, Jun'ichi Yokoyama,
Phys. Rev. D 78, 043527 (2008), IPMU08-0121
The Delay Time Distribution of Type Ia Supernovae
and the Single Degenerate Model,
Izumi Hachisu, Mariko Kato, and Ken'ichi Nomoto,
Astrophys. J. Lett. 683, L127 (2008), IPMU08-0043
A Measurement of Neutralino Mass at the LHC in
Light Gravitino Scenarios,
Koichi Hamaguchi, Eita Nakamura, Satoshi Shirai,
Phys. Lett. B 666, 57 (2008), IPMU08-0029
Early Formation of Dust in the Ejecta of Type Ib
SN 2006jc and Temperature and Mass of the Dust,
Takaya Nozawa, Takashi Kozasa, Nozomu Tominaga,
Itsuki Sakon, Masaomi Tanaka, Tomoharu Suzuki,
Ken'ichi Nomoto, Keiichi Maeda, Hideyuki Umeda,
Marco Limongi, Takashi Onaka,
Astrophys. J. 684, 1343 (2008), IPMU08-0004

Non-Gaussianity from Symmetry,
Teruaki Suyama and Fuminobu Takahashi,
JCAP 09, 007 (2008), IPMU08-0015
Isocurvature fluctuations in Affleck-Dine
mechanism and constraints on inflation,
Shinta Kasuya, Masahiro Kawasaki and Fuminobu
Takahash,
JCAP 10, 017 (2008), IPMU08-0032
Empirical Abundance Scaling Laws and
Implications for the Gamma Process in CoreCollapse Supernovae,
Hayakawa, T., Iwamoto, N., Kajino, T., Shizuma, T.,
Umeda, H., and Nomoto, K.,
Astrophys J. 685, 1089 (2008)
The metamorphosis of Supernova SN2008D/
XRF080109: a link between Supernovae andGRBs/Hypernovae,
Paolo A. Mazzali, Stefano Valenti, Massimo Della Valle,
Guido Chincarini, Daniel N. Sauer, Stefano Benetti,
Elena Pian, Tsvi Piran, Valerio D'Elia, Nancy EliasRosa, Raffaella Margutti, Francesco Pasotti, L. Angelo
Antonelli, Filomena Bufano, Sergio Campana, Enrico
Cappellaro, Stefano Covino, Paolo D'Avanzo, Fabrizio
Fiore, Dino Fugazza, Roberto Gilmozzi, Deborah
Hunter, Kate Maguire, Elisabetta Maiorano, Paola
Marziani, Nicola Masetti, Felix Mirabel, Hripsime
Navasardyan, Ken'ichi Nomoto, Eliana Palazzi, Andrea
Pastorello, Nino Panagia, Leonardo J. Pellizza, Re'em
Sari, Stephen Smartt, Gianpiero Tagliaferri, Masaomi
Tanaka, Stefan Taubenberger, Nozomu Tominaga,
Carrie Trundle, Massimo Turatto,
Science 321, 1185 (2008), IPMU08-0049
Gauge Mediation with Sequestered Supersymmetry
Breaking,
Satoshi Shirai, Fuminobu Takahashi, T. T. Yanagida andKazuya Yonekura,Phys. Rev. D 78, 075003 (2008), IPMU08-0053

GALEX Spectroscopy of SN 2005ay suggests a UV
spectral uniformity among type II-P supernovae,
A. Gal-Yam, F. Bufano, T. Barlow, E. Baron, S. Benetti,
E. Cappellaro, P.J. Challis, R.S. Ellis, A.V. Filippenko,
R.J. Foley, D.B. Fox, R.P. Kirshner, D.C. Leonard, W.
Li, D. Maoz, T. Matheson, P.A. Mazzali, M. Modjaz, K.
Nomoto, E.O. Ofek, J. Simon, T. Small, G.P. Smith, M.
Turatto, S.D. Van Dyk, and L. Zampieri,
Astrophys. J. Lett. 685, L117 (2008), IPMU08-0047

Simulations of Baryon Accoustic Osccilations I:
Growth of Large-Scale Density Fluctuations,
Ryuichi Takahashi, Naoki Yoshida, et al.
MNRAS 389, 1675 (2008)

Hidden Grassmann Structure in XXZ Model II:
Creation Operators,
H. Boos, M. Jimbo, T. Miwa, F. Smirnov, Y. Takeyama,Commun. Math. Phys. 286, 875 (2009), IPMU08-0001

Growth functions associated with Artin monoidsof finite type,
Kyoji Saito,
Proc. Japan Acad. Ser. A, 84, 179-183 (2008), IPMU080037

On the Eccentricity Distribution of Exoplanetsfrom Radial Velocity Surveys,
Yue Shen and Edwin L. Turner,
Astrophys. J. 685, 553 (2008), IPMU09-0073

The ground states of baryoleptonic Q-balls insupersymmetric models,
Ian M. Shoemaker, Alexander Kusenko,
Phys. Rev. D 78, 075014 (2008), IPMU09-0152

Handling jets + missing E(T) channel using
inclusive m(T2),
Mihoko M. Nojiri, Kazuki Sakurai, Yasuhiro Shimizu,
Michihisa Takeuchi,
JHEP 0810, 100 (2008), IPMU-08-0051
Study of the top reconstruction in top-partner
events at the LHC,
Mihoko M. Nojiri, Michihisa Takeuchi,
JHEP 0810, 025 (2008), IPMU08-0010
Non-Gaussianity from isocurvature perturbations,
Masahiro Kawasaki, Kazunori Nakayama, Toyokazu
Sekiguchi, Teruaki Suyama, Fuminobu Takahashi,
JCAP 11, 019 (2008), IPMU08-0050
Injection of Short-Lived Radionuclides into the
Early Solar System from a Faint Supernova with
Mixing Fallback,Takigawa, A., Miki, J., Tachibana, S., Huss, G. R.,
Tominaga, N., Umeda, H., and Nomoto, K.,
Astrophys. J. 685, 1382 (2008)

Publications

Publications

Gravitational Waves as a Probe of the Gravitino
Mass,
Fuminobu Takahashi, T.T. Yanagida, and Kazuya
Yonekura,
Phys. Lett. B 664, 194 (2008), IPMU08-0011

Discriminating spin through quantum interference,
Matthew R. Buckley, Hitoshi Murayama, William
Klemm,Vikram Rentala,Phys. Rev. D 78, 014028 (2008), IPMU 07-0002

Tycho Brahe's 1572 Supernova as a standard typeIa explosion revealed from its light echo spectrum,
Oliver Krause, Masaomi Tanaka, Tomonori Usuda,
Takashi Hattori, Miwa Goto, Stephan Birkmann,Ken'ichi Nomoto,
Nature 456, 617 (2008), IPMU08-0108
Reconstruction of the primordial fluctuation
spectrum from the five-year WMAP data by
the cosmic inversion method with band-power
decorrelation analysis,
Ryo Nagata, Jun'ichi Yokoyama,
Phys. Rev. D 78, 123002 (2008), IPMU08-0124
Optical Spectropolarimetry and Asphericity of TypeIc SN 2007gr,
Masaomi Tanaka, Koji S. Kawabata, Keiichi Maeda,
Takashi Hattori, and Ken'ichi Nomoto,
Astrophys. J. 689, 1191 (2008), IPMU08-0045
Constraints on the time variation of the finestructure constant by the 5-year WMAP data,
Masahiro Nakashima, Ryo Nagata, Jun'ichi Yokoyama,
Prog. Theor. Phys. 120, 1207 (2008), IPMU08-0125
Holographic Baryons: Static Properties and Form
Factors from Gauge/String Duality,
Koji Hashimoto, Tadakatsu Sasaki, and Shigeki
Sugimoto,
Prog. Theo. Phys. 120, 1093 (2008), IPMU08-0027
Disordered Systems and Replica Method in AdS/
CFT,
Mitsutoshi Fujita, Yasuaki Hikida, Shinsei Ryu andTadashi Takayanagi,
JHEP 12, 065 (2008), IPMU08-0080

87

The evolution of the peculiar Type Ia supernova
SN 2005hk over 400 days,
D.K. Sahu, Masaomi Tanaka, G.C. Anupama, Koji S.
Kawabata, Keiichi Maeda, Nozomu Tominaga, Ken'ichi
Nomoto, and Paolo A. Mazzali,
Astrophys. J. 680, 580 (2008), IPMU07-0011

Subaru and Keck Observations of the Peculiar
Type Ia Supernova 2006gz at Late Phases,
Keiichi Maeda, Koji Kawabata, Weidong Li, Masaomi
Tanaka, Paolo A. Mazzali, Takashi Hattori, Ken'ichi
Nomoto, Alex V. Filippenko,
Astrophys. J. 690, 1745-1752 (2009), IPMU08-0073
Implications to Sources of Ultra-high-energy
Cosmic Rays from their Arrival Distribution,
Hajime Takami and Katsuhiko Sato,
Astroparticle Physics 30, 306 (2009), IPMU08-0101

88

A note on Markov type constants,
Shin-ichi Ohta and Mikael Pichot,
Arch. Math. 92, No. 1, 80-88 (2009), IPMU08-0079
Impact of Rotation on Neutrino Emission and Relic
Neutrino Background from Population III Stars,
Yudai Suwa, Tomoya Takiwaki, Kei Kotake, andKatsuhiko Sato,
Astrophys. J. 690, 913 (2009), IPMU08-0099
Neutrino mixing and mass hierarchy in Gaussian
landscapes,
Lawrence J. Hall, Michael P. Salem and Taizan Watari,
Phys. Rev. D 79, 025010 (2009), IPMU08-0076
Constraints on Neutrino Masses from Weak
Lensing,
Kiyotomo Ichiki, Masahiro Takada, Tomo Takahashi,
Phys. Rev. D 79, 023520 (2009), IPMU08-0083
Consistent Anti-de Sitter-Space/ConformalField-Theory Dual for a Time-Dependent Finite
Temperature System,
Shunichiro Kinoshita, Shinji Mukohyama, ShinNakamura, Kin-ya Oda,
Phys. Rev. Lett. 102, 031601 (2009), IPMU08-0055
Nonlinear superhorizon perturbations of noncanonical scalar field,
Yu-ichi Takamizu and Shinji Mukohyama,
JCAP 0901, 013 (2009), IPMU08-0056
Cosmological Moduli Problem from Thermal
Effects,
Kazunori Nakayama, Fuminobu Takahashi,
Phys. Lett. B 670, 434 (2009), IPMU08-0085

Solving Cosmological Problems of Supersymmetric
Axion Models in Inflationary Universe,
Masahiro Kawasaki, Kazunori Nakayama,
Phys. Rev. D 77, 123524 (2008), IPMU08-0025

Thermal Evolution of Hyperon-Mixed NeutronStars,
Tsuruta, S., Sadino, J., Kobelski, A., Teter, M. A.,
Liebmann, A. C., Takatsuka, T., Nomoto, K., andUmeda, H.,
Astrophys J. 691, 621 (2009)

Type Ib Supernova 2008D associated with the
Luminous X-ray Transient 080109: An Energetic
Explosion of a Massive Helium Star,
Masaomi Tanaka, Nozomu Tominaga, Ken'ichi
Nomoto, S. Valenti, D.K. Sahu, T. Minezaki, Y. Yoshii, M.
Yoshida, G.C. Anupama, S. Benetti, G. Chincarini, M.
Della Valle, P.A. Mazzali, E. Pian,
Astrophys. J. 692, 1131 (2009), IPMU08-0048

GeV Majorana Neutrinos in Top Decay at the LHC,
Zongguo Si and Kai Wang,
Phys. Rev. D 79, 014034 (2009), IPMU08-0068
Implications to Ultra-high energy cosmic rays forTransient Sources in the Auger Era,
Kohta Murase, Hajime Takami,
Astrophys J. Lett. 690, L14 (2009)
Cosmogenic neutrinos as a probe of the transition
from Galactic to extragalactic cosmic rays,
Hajime Takami, Kohta Murase, Shigehiro Nagataki,
Katsuhiko Sato,
Astropart. Phys. 31, 201 (2009)
Non-Gaussianity from Baryon Asymmetry,
Masahiro Kawasaki, Kazunori Nakayama, Fuminobu
Takahashi,
JCAP 01, 002 (2009), IPMU08-0061
Hilltop Non-Gaussianity,
Masahiro Kawasaki, Kazunori Nakayama, Fuminobu
Takahashi,
JCAP 01, 026 (2009), IPMU08-0072
A General Analysis of Non-Gaussianity from
Isocurvature Perturbations,
Masahiro Kawasaki, Kazunori Nakayama, Toyokazu
Sekiguchi, Teruaki Suyama, Fuminobu Takahashi,
JCAP 01, 042 (2009), IPMU08-0069
Apparent shape of super-spinning black holes,
Cosimo Bambi and Katherine Freese,
Phys. Rev. D 79, 043002 (2009), IPMU08-0095
Properties of newly formed dust by SN2006jc
based on near-to-mid infrared observation withAKARI,
I. Sakon, T. Wada, Y. Ohyama, D. Ishihara, T. Tanabe,
H. Kaneda, T. Onaka, N. Tominaga, M. Tanaka, T.
Suzuki, H. Umeda, K. Nomoto, T. Nozawa, T. Kozasa, T.
Minezaki, Y. Yoshii, S. Ohyabu, F. Usui, H. Matsuhara, T.
Nakagawa, and H. Murakami,
Astrophys. J. 692, 546-555 (2009), IPMU07-0013
Current Correlators for General Gauge Mediation,
Hirosi Ooguri, Yutaka Ookouchi, Chang-Soon Park,and Jaewon Park,
Nucl. Phys. B 808, 121-136 (2009), IPMU08-0038

Cosmic rays from Leptonic Dark Matter,
Chuan-Ren Chen, Fuminobu Takahashi,
JCAP 02, 004 (2009), IPMU08-0071
Gravity with Perturbative Constraints: Dark Energy
Without New Degrees of Freedom,
Alan Cooney, Simon DeDeo, Dimitrios Psaltis,
Phys. Rev. D 79, 044033 (2009), IPMU08-0098
A Holographic Dual of Bjorken Flow,
Shunichiro Kinoshita, Shinji Mukohyama, ShinNakamura, Kin-ya Oda,
Prog. Theo. Phys. 121, 121-164 (2009), IPMU08-0039
Observational Characteristics and Possible
Asphericity of Over-Luminous Type Ia Supernovae,
Keiichi Maeda and Koichi Iwamoto,MNRAS 394, 239 (2009), IPMU08-0090
High-energy Cosmic-Ray Positrons from HiddenGauge-Boson Dark Matter,
Chuan-Ren Chen, Fuminobu Takahashi and T. T.
Yanagida,
Phys. Lett. B 673, 255 (2009), IPMU08-0086
Color Sextet Scalars at the CERN Large Hadron
Collider,Chuan-ren Chen, William L. Klemm, Vikram Rentala,Kai Wang,
Phys. Rev. D 79, 054002 (2009), IPMU08-0084
Triplet Scalars and Dark Matter at the LHC,
Pavel Fileviez Perez, Hiren Patel, Michael RamseyMusolf, Kai Wang,
Phys. Rev. D 79, 055024 (2009), IPMU08-0091
GUT Relations from String Theory
Compactifications,Radu Tatar and Taizan Watari,
Nucl. Phys. B 810, 316 (2009), IPMU08-0035
The Interplay Between the "Low" and "High"Energy CP-Violation in Leptogenesis,
E. Molinaro, S. T. Petcov
Eur. Phys. J. C61, 93-109 (2009), IPMU08-0013

JFY2009
Spectral Energy Distribution of Radio Sourcesin Nearby Clusters of Galaxies: Implications for
Sunyaev-Zel'dovich Effect Surveys,
Y.-T. Lin, R.B. Partridge, J. Pober, K. El Bouchefry, S.
Burke, J. Klein, J. Coish, K. Huffenberger,
Astrophys. J. 694, 992 (2009), IPMU10-0030
Conformal Inflation, Modulated Reheating and
WMAP5,
Takeshi Kobayashi and Shinji Mukohyama,
Phys. Rev. D 79, 083501 (2009), IPMU08-0060
The 21cm Signature of Early Relic HII Regions,
Midori Tokutani, Naoki Yoshida, S. Peng Oh, Naoshi
Sugiyama,
MNRAS 395, 777 (2009)
Search for Proton Decay via p → e+π0 and
p →μ+π0 in a Large Water Cherenkov Detector,
The Super-Kamiokande Collaboration,
Phys Rev. Lett. 102, 141801 (2009)
No Evidence for Variability of Intervening
Absorption Lines toward GRB 060206:
Implications for the Mg II Incidence Problem,
Kentaro Aoki, Tomonori Totani, Takashi Hattori, Kouji
Ohta, Koji S. Kawabata, Naoto Kobayashi, Masanori
Iye, Ken'ichi Nomoto, and Nobuyuki Kawai,
Publ. Astron. Soc. Japan 61, 387 (2009), IPMU080066
Emergent Calabi-Yau Geometry,
Hirosi Ooguri and Masahito Yamazaki,
Phys. Rev. Lett. 102, 161601 (2009), IPMU09-0025
Nucleosynthesis of 56Ni in wind-driven Supernova
Explosions and Constraints on the Central Engine
of Gamma-Ray Bursts,
Keiichi Maeda and Nozomu Tominaga,
MNRAS 394, 1317 (2009), IPMU09-0001
A Possible Solution to the Strong CP Problem,
Fuminobu Takahashi,
Prog. Theo. Phys. 121, 711 (2009), IPMU08-0022
Tensors, non-Gaussianities, and the future ofpotential reconstruction,
Brian A. Powell, Konstantinos Tzirakis, William H.
Kinney,JCAP 04, 019 (2009), IPMU08-0114
Nucleosynthesis in Electron Capture Supernovaeof Asymptotic Giant Branch Stars,
Wanajo, S., Nomoto, K., Janka, H.-T., Kitaura, F. S., andMüller, B.,
Astrophys. J. 695, 208 (2009)

Publications

Publications

Aspherical Properties of Hydrodynamics andNucleosynthesis in Jet-induced Supernovae,
Nozomu Tominaga,
Astrophys. J. 690, 526 (2009), IPMU07-0014

Gamma rays and positrons from a decaying
hidden gauge boson,
Chuan-Ren Chen, Fuminobu Takahashi, T. T. Yanagida,
Phys. Lett. B 671, 71 (2009), IPMU08-0058

89

Optical photometry and spectroscopy of the typeIbn supernova SN2006jc until the onset of dust
formation,
G. C. Anupama, D. K. Sahu, U. K. Gurugubelli, T. P.
Prabhu, N. Tominaga, M. Tanaka, K. Nomoto,MNRAS 392, 894 (2009), IPMU08-0111

Publications

The Impact of Non-Gaussian Errors on Weaklensing Surveys,
Masahiro Takada, Bhuvnesh Jain,MNRAS 395, 2065-2086 (2009), IPMU08-0070
The Extremely Luminous Supernova 2006gy at
Late Phase: Detection of Optical Emission fromSupernova,
Kawabata, K., Tanaka, M., Maeda, K., Hattori, T.,
Nomoto, K., Tominaga, N., Yamanaka, M.,
Astrophys. J. 697, 676-683 (2009), IPMU09-0039

90

Formation of the First Stars and Galaxies,
Volker Bromm, Naoki Yoshida, Christopher McKee, Lars
Hernquist,
Nature, 459, 49 (2009)
Coset construction for Duals of Non-relativistic
CFTs,
Sakura Schafer-Nameki, Masahito Yamazaki, Kentaroh
Yoshida,JHEP 05, 038 (2009), IPMU09-0036
Decaying Hidden Gaugino as a Source of PAMELA/ATIC Anomalies,
Satoshi Shirai, Fuminobu Takahashi, T.T.Yanagida,
Phys. Lett. B 675, 73 (2009), IPMU09-0027
Dark Matter Model Selection and the ATIC/PPBBETS anomaly,
Chuan-Ren Chen, Koichi Hamaguchi, Mihoko Nojiri,
Fuminobu Takahashi, Shoji Torii,
JCAP 0905, 015 (2009), IPMU08-0113
The broad line type Ic supernova SN 2007ru:
Adding to the diversity of type Ic supernovae,
D.K. Sahu, Masaomi Tanaka, G.C. Anupama, Uday K.
Gurugubelli, and Ken'ichi Nomoto,
Astrophys. J. 697, 676 (2009), IPMU08-0044
Split universal extra dimension and dark matter,
Seong Chan Park and Jing Shu,
Phys. Rev. D 79, 091702(R) (2009), IPMU09-0003
Quasar Clustering from SDSS DR5: Dependenceson Physical Properties,
Y. Shen, M.A. Strauss, N.P. Ross, P.B. Hall, Y.-T. Lin, G.T.
Richards, D.P. Schneider, D.H. Weinberg, A.J. Connolly,
X. Fan, J.F. Hennawi, F. Shankar, D.E. Vanden Berk,
N.A. Bahcall, R.J. Brunner,
Astrophys. J. 697, 1656 (2009), IPMU10-0031

Fractional Quantum Hall Effect via Holography:
Chern-Simons, Edge States, and Hierarchy,
Mitsutoshi Fujita, Wei Li, Shinsei Ryu, Tadashi
Takayanagi,
JHEP 06, 066 (2009), IPMU09-0002

Modeling Nonlinear Evolution of Baryon Acoustic
Oscillations,Takahiro Nishimichi, Akihito Shirata, Atsushi Taruya,
Shun Saitoh, Kazuhiro Yahata, Yasushi Suto, Ryuichi
Takahashi, Naoki Yoshida, Takahiko Matsubara, Naoshi
Sugiyama, Issha Kayo, Yi-Peng Jing, Kohji Yoshikawa,
Publication of Astronomical Society of Japan 61, 32(2009)

Neutrino-induced reactions on Fe56 and Ni56,
and production of Mn55 in population III stars,
Suzuki, T., Honma, M., Higashiyama, K., Yoshida, T.,
Kajino, T., Otsuka, T., Umeda, H., and Nomoto, K.,
Phys. Rev. C 79, 061603 (2009)

Toward First-Principle Simulations of Galaxy
Formation II,
Takayuki Saitoh, Hiroshi Daisaka, Eiichiro Kokubo, Jun
Makino, Takashi Okamoto, Kohji Tomisaka, Keiichi
Wada, Naoki Yoshida,
Publication of Astronomical Society of Japan, 61, 481(2009)
Configuration of the central streams in the moduli
of abelian varieties,
Shushi Harashita,
Asian J. Math. 13, 215 (2009), IPMU08-0104
Runaway Dynamics and Supersymmetry Breaking,Izawa K.-I., Fuminobu Takahashi, T.T.Yanagida, Kazuya
Yonekura,
Phys. Lett. B 677, 195 (2009), IPMU09-0020
Kinematic reconstruction of atmospheric neutrino
events in a large water Cherenkov detector with
proton identification
The Super-Kamiokande Collaboration,
Phys. Rev. D 79, 112010 (2009)
Nebular emission-line profiles of Type Ib/c
Supernovae - probing the ejecta asphericity,
S. Taubenberger, S. Valenti, S. Benetti, E. Cappellaro, M.
Della Valle, N. Elisa-Rosa, S. Hachinger, W. Hillebrandt,
K. Maeda, P.A. Mazzali, A. Pastorello, F. Patat, S.A. Sim,and M. Turatto,
MNRAS 397, 677 (2009), IPMU09-0051
Scale-invariant cosmological perturbations from
Horava-Lifshitz gravity without inflation,
Shinji Mukohyama,
JCAP 0906, 001 (2009), IPMU09-0041
Thermodynamic and dynamical stability of FreundRubin compactification,
Shunichiro Kinoshita and Shinji Mukohyama,
JCAP 0906, 020 (2009), IPMU09-0031
Discriminating Electroweak-ino Parameter Ordering
at the LHC and Its Impact on LFV Studies,
Junji Hisano, Mihoko M. Nojiri, Warintorn
Sreethawong,
JHEP 0906, 044 (2009)

Neutrinoless Double Beta Decay and Br(H±± → l ±l ±)Decays in the Higgs Triplet Model,
S.T. Petcov, H. Sugiyama and Y. Takanishi,
Phys. Rev. D 80, 015005 (2009), IPMU09-0037
Gravitational waves from the fragmentation of asupersymmetric condensate,
Alexander Kusenko, Anupam Mazumdar, Tuomas
Multamaki,
Phys. Rev. D 79, 124034 (2009), IPMU09-0151
Cross-correlation between UHECR Arrival
Distribution and Large-scale Structure,
Hajime Takami, Takahiro Nishimichi, Kazuhiko Yahata,
Katsuhiko Sato,
JCAP 06, 031 (2009), IPMU08-0102
The Onset of Star Formation in Primordial Halos,
Umberto Maio, Benedetta Ciardi, Naoki Yoshida, Klaus
Dolag, Luca Tornatore,
Astronomy and Astrophysics, 503, 25 (2009)
Spectropolarimetry of the Unique Type Ib
Supernova 2005bf: Larger Asymmetry Revealed by
Later-Phase Data,
Tanaka, M., Kawabata, K.S., Maeda, K., Iye, M., Hattori,T., Pian, E., Nomoto, K., Mazzali, P.A., Tominaga, N.,
Astrophys. J. 699, 1119-1124 (2009), IPMU09-0077
Axion braneworld cosmology,
Cosimo Bambi, Masahiro Kawasaki, Federico R. Urban,
Phys. Rev. D 80, 023533 (2009), IPMU09-0033
Neutrinos from the terrestrial passage ofsupersymmetric dark matter Q-balls,
Alexander Kusenko, Ian M. Shoemaker,
Phys. Rev. D 80, 027701 (2009), IPMU09-0149
New Limits on Sterile Neutrinos from Suzaku
Observations of the Ursa Minor Dwarf Spheroidal
Galaxy,Michael Loewenstein, Alexander Kusenko, Peter L.
Biermann,
Astrophys. J. 700, 426 (2009), IPMU09-0035

On the Spin-Orbit Misalignment of the XO-3
Exoplanetary System,
Joshua N. Winn, John Asher Johnson, Daniel
Fabrycky, Andrew W. Howard, Geoffrey W. Marcy,
Norio Narita, Ian J. Crossfield, Yasushi Suto, Edwin L.
Turner, Gil Esquerdo and Matthew J. Holman,
Astrophys. J. 700, 302-308 (2009), IPMU09-0074
Hidden Grassmann Structure in XXZ Model III:
Introducing Matsubara direction,
M. Jimbo, T. Miwa, F. Smirnov,
J. Phys. A42, 304018 (2009), IPMU08-0116
Cosmological Constraints on a Massive Neutrino,
Masahiro Kawasaki, Katsuhiko Sato,
Prog. Theo. Phys. 122, 205 (2009), IPMU09-0109
Simulations of Baryon Acoustic Oscillations II,
Ryuichi Takahashi, Naoki Yoshida, Masahiro Takada,
Takahiko Matsubara, Naoshi Sugiyama, Issha Kayo,
Takahiro Nishimichi, Akihito Shirata, Atsushi Taruya,
Shun Saitoh,
Astrophys. J. 700, 479 (2009)

Publications

Search for Neutrinos from GRB 08031B at SuperKamiokande,
The Super-Kamiokande Collaboration
Astrophys. J. 697, 730-734 (2009)

Decaying gravitino dark matter and an upperbound on the gluino mass,
Koichi Hamaguchi, Fuminobu Takahashi, Tsutomu
Yanagida,
Phys. Lett. B677, 59-61 (2009), IPMU09-0005

Curvatons in Warped Throats,
Takeshi Kobayashi and Shinji Mukohyama,
JCAP 07 (2009) 032, IPMU09-0064
Relating Field Theories via Stochastic
Quantization,
Robbert Dijkgraaf, Domenico Orlando, SusanneReffert,Nucl. Phys. B 824, 365 (2010), IPMU09-0030
Nebular Phase Observations of the Type Ib
Supernova 2008D/X-ray Transient 080109: SideViewed Bipolar Explosion,
Tanaka, M., Yamanaka, M., Maeda, K., Kawabata, K.S.,
Hattori, T., Minezaki, T., Valenti, S., Della Valle, M.,
Sahu, D.K., Anupama, G.C., Tominaga, N., Nomoto, K.,
Mazzali, P.A., Pian, E.,
Astrophys. J. 700, 1680 (2009), IPMU09-0078
Phenomenological Aspects of Horava-Lifshitz
Cosmology,
Shinji Mukohyama, Kazunori Nakayama, Fuminobu
Takahashi, Shuichiro Yokoyama,
Phys. Lett. B679:6-9, 2009, IPMU09-0052
On the Renormalizability of Horava-Lifshitz-type
Gravity,
Domenico Orlando and Susanne Reffert,
Class. Quant. Grav. 26, 155021 (2009), IPMU09-0053
Nuclear Force from String Theory,
Koji Hashimoto, Tadakatsu Sakai, Shigeki Sugimoto,
Prog. Theo. Phys. 122, 427 (2009), IPMU09-0010

91

First Study of Neutron Tagging with a Water
Cherenkov Detector,
The Super-Kamiokande Collaboration,
Astropart. Phys. 31, 320-328 (2009)

Early Blackhole Formation by Accretion of Gas andDark Matter,
Hideyuki Umeda, Naoki Yoshida, Ken'ichi Nomoto, Mei
Sasaki, Sachiko Tsuruta,
JCAP 08, 024 (2009)
Decaying Hidden Gauge Boson and the PAMELA
and ATIC/PPB-BETS Anomalies,
Chua-Ren Chen, Mihoko M. Nojiri, Fuminobu
Takahashi, T.T. Yanagida,
Prog. Theor. Phys. 122, 553-559 (2009), IPMU08-0092

92

The R-axion and non-Gaussianity,
Kazunori Nakayama, Fuminobu Takahashi,
Phys. Lett. B 679, 436 (2009), IPMU09-0082
Dark matter as integration constant in HoravaLifshitz gravity,
Shinji Mukohyama,
Phys. Rev. D 80, 064005 (2009), IPMU09-0066
Large U e3 and Tri-bimaximal Mixing,
Srubabati Goswami, Serguey Petcov, Shamayita Ray,
Werner Rodejohann,Phys. Rev. D 80, 053013 (2009)
Successive extensions of minimal p-divisiblegroups,Shushi Harashita,
Journal of Pure and Applied Algebra 213, 1823-1834(2009), IPMU08-0105
Non-Gaussianity from Isocurvature Perturbations:
Analysis of Trispectrum,
Etsuko Kawakami, Masahiro Kawasaki, Kazunori
Nakayama, Fuminobu Takahashi,
JCAP 0909, 002 (2009), IPMU09-0059
Caustic avoidance in Horava-Lifshitz gravity,
Shinji Mukohyama,
JCAP 0909, 005 (2009), IPMU09-0081
Non-thermal Gravitino Dark Matter in Gauge
Mediation,
Koichi Hamaguchi, Fuminobu Takahashi, Ryuichiro
Kitano,JHEP 09, 127 (2009), IPMU09-0088

Accretion process onto super-spinning objects,
Cosimo Bambi, Katherine Freese, Tomohiro Harada,
Rohta Takahashi, Naoki Yoshida,Phys. Rev. D 80, 104023 (2009), IPMU09-0113

Cosmological Constraints on Rapid Roll Inflation,
Takeshi Kobayashi, Shinji Mukohyama, Brian A. Powell,
JCAP 09, 023 (2009), IPMU09-0050

Photometric Variability in Earthshine Observations,
Sally V. Langford, J. Stuart, B. Wyithe and Edwin L.
Turner,Astrobiology 9(3), 305 (2009), IPMU09-0076

Circumventing the eta problem,
Damien Easson and Ruth Gregory,Phys. Rev. D 80, 083518 (2009), IPMU09-0009
SN 2003bg: A Broad-Lined Type IIb Supernova
with Hydrogen,
Mazzali, P. A., Deng, J., Hamuy, M., and Nomoto, K.,
Astrophys. J. 703, 1624 (2009)
R-violating Decay of Wino Dark Matter andelectron/positron Excesses in the PAMELA/Fermi
Experiments,
Satoshi Shirai, Fuminobu Takahashi, T. T. Yanagida,
Phys. Lett. B 680, 485 (2009), IPMU09-0054
Conformal Supersymmetry Breaking in Vector-like
Gauge Theories,
Izawa K.-I., Fuminobu Takahashi, T. T. Yanagida, andKazuya Yonekura,Phys. Rev. D 80, 085017 (2009), IPMU09-0057
Nonlinear galaxy power spectrum for a mixed
dark matter model: perturbation theory approachand parameter forecasts,
Shun Saito, Masahiro Takada, Atsushi Taruya,
Phys. Rev. D 80, 083528 (2009), IPMU09-0084
Half-BPS quotients in M-theory: ADE with a twist,
Paul de Medeiros, Jose Figueroa-O'Farrill, Sunil
Gadhia, Elena Mendez-Escobar,
JHEP 10, 038 (2009), IPMU09-0108
Crystal Melting and Toric Calabi-Yau Manifolds,
Hirosi Ooguri and Masahito Yamazaki,
Commun. Math. Phys. 292, 179-199 (2009), IPMU080087
Implications of primordial black holes on the firststars and the origin of the super-massive black
holes,
Cosimo Bambi, Douglass Spolyar, Alexander D.
Dolgov, Katherine Preese, Marta Volonteri,
MNRAS 399, 1347 (2009), IPMU08-0096
Like-sign Di-lepton Signals in Higgsless Models at
the LHC,
Tao Han, Haishan Liu, Mingxing Luo, Kai Wang, Wei
Wu,
Phys. Rev. D 80, 095010 (2009), IPMU09-0072

Growth functions for Artin monoids,
Kyoji Saito,
Proc. Jpn. Acad. Ser.A 85, Ser. A, No.7,84-88 (2009),
IPMU09-0034
Simplicity in the Faulkner construction,
Jose Figueroa-O'Farrill,
J. Phys A 42, 445206 (2009), IPMU09-0069
AKARI Infrared Observations of the Supernova
Remnant G292.0+1.8: Unveiling Circumstellar
Medium and Supernova Ejetca,
Ho-Gyu Lee, Bon-Chul Koo, Dae-Sik Moon, Itsuki
Sakon, Takashi Onaka, Woong-Seob Jeong, Hidehiro
Kaneda, Takaya Nozawa, Takashi Kozasa,
Astrophys. J. 706, 441 (2009), IPMU09-0122
Properties of Type II Plateau Supernova SNLS04D2dc: Multicolor Light Curves of Shock
Breakout and Plateau,
N. Tominaga, S. Blinnikov, P. Baklanov, K. Nomoto,
Astrophys. J. Lett. 705, 10 (2009), IPMU09-0115
Cosmic-ray Electron and Positron Excesses from
Hidden Gaugino Dark Matter,
Satoshi Shirai, Fuminobu Takahashi, T. T. Yanagida,
Prog. Theo. Phys. 122, 1277-1284 (2009), IPMU090065
Right-handed neutrinos in F-theory
compactifications,Radu Tatar, Yoichi Tsuchiya and Taizan Watari,
Nucl. Phys. B 823, 1 (2009), IPMU09-0047
Codimension-3 Singularities and Yukawa
Couplings in F-theory,
Hirotaka Hayashi, Teruhiko Kawano, Radu Tatar andTaizan Watari,
Nucl. Phys. B 823, 47 (2009), IPMU09-0014
Early Phase Observations of Extremely Luminous
Type Ia Supernova 2009dc,
Yamanaka, M., Kawabata, K. S., Kinugasa, K., Tanaka,
M., Imada, A., Maeda, K., Nomoto, K., Arai, A.,
Chiyonobu, S., Fukazawa, Y., Hashimoto, O., Honda,
S., Ikejiri, Y., Itoh, R., Kamata, Y., Kawai, N., Komatsu,
T., Konishi, K., Kuroda, D., Miyamoto, H., Miyazaki,S., Nagae, O., Nakaya, H., Ohsugi, T., Omodaka,T., Sakai, N., Sasada, M., Suzuki, M., Taguchi, H.,
Takahashi, H., Tanaka, H., Uemura, M., Yamashita, T.,
Yanagisawa, K., and Yoshida, M.,
Astrophys. J. Lett. 707, 118 (2009)

O(N) and USp(N) QCD from String Theory,
Toshiya Imoto, Tadakatsu Sakai, Shigeki Sugimoto,
Prog. Theo. Phys. 122, 1433 (2009), IPMU09-0085
Bar complex, configuration spaces and finite typeinvariants for braids,
Toshitake Kohno,
Topology and its Appliations 157, 2 (2010), IPMU080030
Heavy sterile neutrinos and supernova explosions,George M. Fuller, Alexander Kusenko, Kalliopi Petraki,Phys. Lett. B 670, 281 (2009), IPMU09-0154
Nebular Spectra and Explosion Asymmetry of TypeIa Supernovae,
Keiichi Maeda, Stefan Taubenberger, Jesper Sollerman,
Paolo A. Mazzali, Giorgos Leloudas, Ken'ichi Nomoto,
Kentaro Motohara,
Astrophys. J. 708, 1703 (2010), IPMU09-0093

Publications

Publications

Subaru High-Resolution Spectroscopy of Star G in
the Tycho Supernova Remnant,Kerzendorf, W. E., Schmidt, B. P., Asplund, M.,
Nomoto, K., Podsiadlowski, P., Frebel, A., Fesen, R. A.,
and Yong, D.,
Astrophys. J. 701, 1665 (2009)

Search for Astrophysical Neutrino Point Sources at
Super-Kamiokande,
The Super-Kamiokande Collaboration,
Astrophys. J. 704, 503-512 (2009)

On the Perturbative Expansion around a Lifshitz
Point,
Domenico Orlando and Susanne Reffert,
Phys. Lett. B 683, 61 \& 8211, 68 (2010), IPMU090105
Sterile neutrinos: the dark side of the lightfermions,
Alexander Kusenko,
Phys. Rept. 481, 1 (2009), IPMU09-0148
Dark matter and collider phenomenology of splitUED,
Chuan-Ren Chen, Mihoko M. Nojiri, Seong Chan Park,
Jing Shu, Michihisa Takeuchi,
JHEP 09, 078 (2009), IPMU08-0023
Gravitino dark matter from Q-ball decays,
Ian M. Shoemaker, Alexander Kusenko,
Phys. Rev. D 80, 075021 (2009), IPMU09-0147
Novel reconstruction technique for New Physics
processes with initial state radiation,
Johan Alwall, Kenji Hiramatsu, Mihoko M. Nojiri,
Yasuhiro Shimizu,
Phys. Rev. Lett. 103, 151802 (2009)
Will the Large Synoptic Survey Telescope Detect
Extra-Solar Planetesimals Entering the Solar
System?,Moro-Martin, A., Turner, E. L. and Loeb, A.,
Astrophy. J. 704, 733 (2009)
Improved Measurement of the Rossiter-McLaughlin
Effect in the Exoplanetary System HD 17156,
Narita, N., Hirano, T., Sato, B., Winn, J. N., Suto, Y.,
Turner, E. L., Aoki, W., Tamura, M. and Yamada, T.,
Publ. Astron. Soc. Japan 61, 991 (2009)93

Simulations of Wide-Field Weak Lensing Surveys I,
Masanori Sato, Takashi Hamana, Ryuichi Takahashi,
Masahiro Takada, Naoki Yoshida, Takahiko Matsubara,
Naoshi Sugiyama,
Astrophys. J. 701, 945 (2009)

Neutrino mass from a hidden world and its
phenomenological implications,Seong-Chan Park, Kai Wang, T.T. Yanagida,
Phys. Lett. B685, 309-312 (2010), IPMU09-0104

The real topological vertex at work,
Daniel Krefl, Sara Pasquetti and Johannes Walcher,
Nucl. Phys. B 833, 153-198 (2010),

Axigluon as Possible Explanation for ttbar Forward
Backward Asymmetry at Tevatron,
Paul Frampton, Jing Shu and Kai Wang,
Phys. Lett. B 683, 294-297 (2010), IPMU09-0135−,
Invisible Higgs boson from B → Kνν
C.S. Kim, Seongchan Park, Kai Wang, Guo-huai Zhu,
Phys. Rev. D 81, 054004 (2010), IPMU09-0103

Gravitational waves from fragmentation of aprimordial scalar condensate into Q-balls,
Alexander Kusenko, Anupam Mazumdar,
Phys. Rev. Lett. 101, 211301 (2008), IPMU09-0153

Supercomputer simulations of structure formationin the Universe,
Naoki Yoshida,
Computer Physics Communications 180, 625 (2009)

The initial shear field in models with primordial
local non-Gaussianity and implications for halo
and void abundance,
Tsz Yan Lam, Ravi K. Sheth, Vincent Desjacques,
MNRAS 399, 1482 (2009), IPMU10-0003

Simulations of the Microwave Sky,
N. Sehgal, P. Bode, S. Das, C. Hernandez-Monteagudo,
K. Huffenberger, Y.-T. Lin, J. Ostriker, H. Trac,
Astrophys. J. 709, 920 (2010), IPMU10-0033

94

Evolution of Very Massive Population III Stars with
Mass Accretion,
Takuya Ohkubo, Ken'ichi Nomoto, Hideyuki Umeda,
Naoki Yoshida, Sachiko Tsuruta,
Astrophy. J. 706, 1184 (2009)
The Role of Type Ia Supernovae in Chemical
Evolution I: Lifetime of Type Ia Supernovae andMetallicity Effect,
Chiaki Kobayashi, Ken'ichi Nomoto,
Astrophys. J. 707, 1466-1484 (2009), IPMU10-0005
A new interpretation of the gamma-ray
observations of active galactic nuclei,
Warren Essey, Alexander Kusenko,
Astropart. Phys. 33, 81-85 (2010), IPMU09-0150
A Case of Subdominant/Suppressed "High Energy"
Contribution,
E. Molinaro, S.T. Petcov,
Phys. Lett. B671, 60-65 (2009), IPMU08-0057
Observational Signatures of Gravitational
Couplings in DBI Inflation,
Damien A. Easson, Shinji Mukohyama, Brian A. Powell,
Phys. Rev. D81, 023512 (2010), IPMU09-0114
Gamma-ray Constraints on Hadronic and Leptonic
Activities of Decaying Dark Matter,
Chuan-ren Chen, Sourav K. Mandal, Fuminobu
Takahashi,
JCAP 01, 023 (2010), IPMU09-0126

Explorations of the Top quark forward-backward
asymmetry at the Tevatron,
Jing Shu, Tim Tait and Kai Wang,
Phys. Rev. D 81, 034012 (2010), IPMU09-0130

The nonlinear redshift space probability
distribution function in models with local
primordial non-Gaussianity,
Tsz Yan Lam, Vincent Desjacques, Ravi K. Sheth,
MNRAS 402, 2397 (2010), IPMU10-0004

Cosmic-Ray Electron Excess from Pulsars is Spiky
or Smooth?: Continuous and Multiple Electron/
Positron injections,
Norita Kawanaka, Kunihito Ioka, Mihoko M. Nojiri,
Astrophys. J. 710, 958-963 (2010)
Cascade Events at IceCube+DeepCore asa Definitive Constraint on the Dark Matter
Interpretation of the PAMELA and Fermi
Anomalies,
Sourav K. Mandal, Matthew R. Buckley, Katherine
Freese, Douglas Spolyar, Hitoshi Murayama,
Phys. Rev. D 81, 043508 (2010), IPMU09-0143
Production of radioactive isotopes through cosmic
muon spallation in KamLAND,
S. Abe, S. Enomoto, K. Furuno, Y. Gando, H. Ikeda,
K. Inoue, Y. Kibe, Y. Kishimoto, M. Koga, Y. Minekawa,T. Mitsui, K. Nakajima, K. Nakajima, K. Nakamura, M.
Nakamura, I. Shimizu, Y. Shimizu, J. Shirai, F. Suekane,
A. Suzuki, Y. Takemoto, K. Tamae, A. Terashima, H.
Watanabe, E. Yonezawa, S. Yoshida, A. Kozlov, H.
Murayama, J. Busenitz, T. Classen, C. Grant, G. Keefer,
D. S. Leonard, D. McKee, A. Piepke, T. I. Banks, T.
Bloxham, J. A. Detwiler, S. J. Freedman, B. K. Fujikawa,
F. Gray, E. Guardincerri, L. Hsu, K. Ichimura, R. Kadel,
C. Lendvai, K.-B. Luk, T. O'Donnell, H. M. Steiner, L.
A. Winslow, D. A. Dwyer, C. Jillings, C. Mauger, R. D.
McKeown, P. Vogel, C. Zhang, B. E. Berger, C. E. Lane,
J. Maricic, T. Miletic, M. Batygov, J. G. Learned, S.
Matsuno, S. Pakvasa, J. Foster, G. A. Horton-Smith, A.
Tang, S. Dazeley, K. E. Downum, G. Gratta, K. Tolich, W.
Bugg, 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,
Phys. Rev. C 81, 025807 (2010), IPMU10-0037

95

Publications

Majorana Phases and Leptogenesis in See-Saw
Models with A4 Symmetry,
C. Hagedorn, E. Molinaro, S.T. Petcov,
JHEP 0909, 115 (2009), IPMU09-0095

Nucleosynthesis in Two-Dimensional Delayed
Detonation Models of Type Ia Supernova
Explosions,
Keiichi Maeda, Friedrich K. Roepke, Michael Fink,
Wolfgang Hillebrandt, Claudia Travaglio, Friedel
Thielemann,
Astrophys. J. 712, 624 (2010), IPMU09-0094

Publications

Tests of gravity from imaging and spectroscopic
surveys,
Jacek Guzik, Bhuvnesh Jain, Masahiro Takada,Phys. Rev. D 81, 023503 (2010), IPMU10-0015

LHC signature of supersymmetric models with
non-universal sfermion masses,
Sung-Gi Kim, Nobuhiro Maekawa, Keiko I. Nagao,
Mihoko M. Nojiri, Kazuki Sakurai,
JHEP 10, 005 (2009)12. Preprints
IPMU09-0040
Keiichi Maeda
Supernovae in Three-Dimension: A Link toGamma-Ray Bursts,
Frascati Workshop 2007
IPMU09-0041
Shinji Mukohyama,
Scale-invariant cosmological perturbations from
Horava-Lifshitz gravity without inflation,
JCAP 0906, 001 (2009), arXiv:0904.2190 [hep-th]

96

IPMU09-0042
Kazuhide Ichikawa, Masahiro Kawasaki, Mazunori
Nakayama, Toyokazu Sekiguchi, Tomo Takahashi,
Constraining Light Gravitino Mass from Cosmic
Microwave Background
IPMU09-0043
Masahiro Kawasaki, Kazunori Kohri, Kazunori
Nakayama,
Diffuse Gamma-ray Background and Cosmic-ray
positrons from Annihilating Dark Matter

IPMU09-0050
Takeshi Kobayashi, Shinji Mukohyama, Brian A. Powell,
Cosmological Constraints on Rapid Roll Inflation
JCAP 09, 023 (2009), arXiv:0902.1798 [hep-th]
IPMU09-0051
S. Taubenberger, S. Valenti, S. Benetti, E. Cappellaro, M.
Della Valle, N. Elisa-Rosa, S. Hachinger, W. Hillebrandt,
K. Maeda, P.A. Mazzali, A. Pastorello, F. Patat, S.A. Sim,and M. Turatto,
Nebular emission-line profiles of Type Ib/c
Supernovae - probing the ejecta asphericity,
MNRAS 397, 677 (2009), arXiv:0904.4632 [astro-ph]
IPMU09-0052
Shinji Mukohyama, Kazunori Nakayama, Fuminobu
Takahashi, Shuichiro Yokoyama,
Phenomenological Aspects of Horava-Lifshitz
Cosmology,
Phys. Lett. B679,6(2009), arXiv:0905.0055 [hep-th]
IPMU09-0053
Domenico Orlando and Susanne Reffert,
On the Renormalizability of Horava-Lifshitz-type
Gravity,Class. Quant. Grav. 26, 155021 (2009),
arXiv:0905.0301 [hep-th]

IPMU09-0044
Sergei Blinnikov,
Notes on Hidden Mirror World,
Physics of Atomic Nuclei, arXiv:0904.3609 [astro-ph]

IPMU09-0054
Satoshi Shirai, Fuminobu Takahashi and T. T. Yanagida,
R-violating Decay of Wino Dark Matter andelectron/positron Excesses in the PAMELA/Fermi
Experiments,
Phys. Lett. B 680, 485 (2009),arXiv:0905.0388 [hep-ph]

IPMU09-0045
S.I. Blinnikov, I.V. Panov, M.A.Rudzsky, K. Sumiyoshi,
The equation of state and composition of hot,dense matter in core-collapse supernovae,
Astronomy & Astrophysics, arXiv:0904.3849 [astro-ph]

IPMU09-0055
Tatsuo Azeyanagi, Wei Li, Tadashi Takayanagi,
On String Theory Duals of Lifshitz-like Fixed
Points,arXiv:0905.0688 [hep-th]

IPMU09-0046
Shinta Kasuya, Masahiro Kawasaki,
Axion Isocurvature Fluctuations with Extremely
Blue Spectrum

IPMU09-0056
Tatsuma Nishioka, Shinsei Ryu, Tadashi Takayanagi,
Holographic Entanglement Entropy: An Overview

IPMU09-0047
Radu Tatar, Yoichi Tsuchiya and Taizan Watari,
Right-handed neutrinos in F-theory
compactifications,
Nucl. Phys. B 823, 1 (2009), arXiv:0905.2289 [hep-th]
IPMU09-0048
Hitoshi Murayama and Vikram Rentala,Randall-Sundrum graviton spin determination
using azimuthal angular dependence

IPMU09-0057
Izawa K.-I., Fuminobu Takahashi, T. T. Yanagida, andKazuya Yonekura,
Conformal Supersymmetry Breaking in Vector-like
Gauge Theories,
Phys. Rev. D 80, 085017 (2009), arXiv:0905.1764[hep-th]
IPMU09-0058
Hitoshi Murayama and Jing Shu,
Topological Dark Matter

Preprints

Publications

IPMU09-0039
Kawabaka, K., Tanaka, M., Maeda, K., Hattori, T.,
Nomoto, K., Tominaga, N., Yamanaka, M.,
The Extremely Luminous Supernova 2006gy at
Late Phase: Detection of Optical Emission fromSupernova,
Astrophys. J. 697, 676-683 (2009), arXiv:0902.1440[astro-ph]

IPMU09-0049
Shirley Ho, Simon DeDeo, David Spergel,
A New Way to Find the Missing Baryons,Physical Review D, arXiv:0903.2845 [astro-ph]97

JFY2009

IPMU09-0060
Koichi Hamaguchi, Kouhei Nakaji, Eita Nakamura,Inverse Problem of Cosmic-Ray Electron/Positronfrom Dark Matter

IPMU09-0071
Izawa K.-I.,
A Note on Quasi-Riemannian Gravity with Higher
Derivatives,
arXiv:0904.3593 [hep-th]

Preprints

IPMU09-0061
Hirosi Ooguri and Chang-Soon Park,
Supersymmetric Non-relativistic Geometries in M
Theory
IPMU09-0062
Tatsuma Nishioka,
Horava-Lifshitz Holography,
arXiv:0905.0473 [hep-th]
IPMU09-0063
Junji Hisano, Kazunori Nakayama, and Masaki Yang,
Upward muon signals at neutrino detectors as aprobe of dark matter properties

98

IPMU09-0064
Takeshi Kobayashi and Shinji Mukohyama,
Curvatons in Warped Throats,
JCAP 07 (2009) 032, arXiv:0905.2835 [hep-th]
IPMU09-0065
Satoshi Shirai, Fuminobu Takahashi, T. T. Yanagida,
Cosmic-ray Electron and Positron Excesses from
Hidden Gaugino Dark Matter,
JHEP 0909, 115 (2009), arXiv:0905.3235 [hep-ph]
IPMU09-0066
Shinji Mukohyama,
Dark matter as integration constant in HoravaLifshitz gravity,
Phys. Rev. D 80, 064005 (2009), arXiv:0905.3563[hep-th]
IPMU09-0067
Satoshi Shirai and T. T. Yanagida,
A Test for Light Gravitino Scenario at the LHC
IPMU09-0068
Oleg Lychkovskiy, Sergei Blinnikov,
Spin flip of neutrinos with magnetic moment incore-collapse supernova,
Yadernaya Fizika (Physics of Atomic Nuclei),arXiv:0905.3658 [astro-ph]
IPMU09-0069
Jose Figueroa-O'Farrill,
Simplicity in the Faulkner construction,
J. Phys A 42, 445206 (2009), arXiv:0905.4900 [hep-th]

IPMU09-0072
Tao Han, Haishan Liu, Mingxing Luo, Kai Wang, Wei
Wu,
Like-sign Di-lepton Signals in Higgsless Models at
the LHC,
Phys. Rev. D 80, 095010 (2009), arXiv:0908.2186[hep-ph]IPMU09-0073
Yue Shen and Edwin L. Turner,
On the Eccentricity Distribution of Exoplanetsfrom Radial Velocity Surveys,
Astrophys. J. 685, 553 (2008), arXiv:0806.0032 [astroph]
IPMU09-0074
Joshua N. Winn, John Asher Johnson, Daniel
Fabrycky, Andrew W. Howard, Geoffrey W. Marcy,
Norio Narita, Ian J. Crossfield, Yasushi Suto, Edwin L.
Turner, Gil Esquerdo and Matthew J. Holman,
On the Spin-Orbit Misalignment of the XO-3
Exoplanetary System,
Astrophys. J. 700, 302-308 (2009), arXiv:0902.3461[astro-ph]

IPMU09-0078
Tanaka, M., Yamanaka, M., Maeda, K., Kawabata, K.S.,
Hattori, T., Minezaki, T., Valenti, S., Della Valle, M.,
Sahu, D.K., Anupama, G.C., Tominaga, N., Nomoto, K.,
Mazzali, P.A., Pian, E.,
Nebular Phase Observations of the Type Ib
Supernova 2008D/X-ray Transient 080109: SideViewed Bipolar Explosion,
Astrophys. J. 700, 1680 (2009), arXiv:0906.1061[astro-ph]
IPMU09-0079
Kawabata, K.S., Maeda, K., Nomoto, K., Taubenberger,
S., Tanaka, M., Hattori, T., Itagaki, K.,
A unique Core-Collapse Supernova in An Elliptical
Galaxy,arXiv:0906.2811 [astro-ph]
IPMU09-0080
Jacek Guzik, Bhuvnesh Jain, Masahiro Takada,
Tests of Gravity from Imaging and Spectroscopic
Surveys,arXiv:0906.2221 [astro-ph]
IPMU09-0081
Shinji Mukohyama,
Caustic avoidance in Horava-Lifshitz gravity,
JCAP 0909, 005 (2009), arXiv:0906.5069 [hep-th]
IPMU09-0082
Kazunori Nakayama, Fuminobu Takahashi,
The R-axion and non-Gaussianity
Phys. Lett. B 679, 436 (2009)
IPMU09-0083
Gaston Giribet, Yasuaki Hikida, Tadashi Takayanagi,
Topological String on OSP(1–2)/U(1)

IPMU09-0075
Norio Narita; Teruyuki Hirano; Bun'ei Sato; Joshua
N. Winn; Yasushi Suto; Edwin L. Turner; Wako Aoki;
Motohide Tamura & Toru Yamada,Improved Measurement of he Rossiter-McLaughlin
Effect in the Exoplanetary System HD 17156,
PASJ in press, arXiv:0905.4727 [astro-ph]

IPMU09-0084
Shun Saito, Masahiro Takada, Atsushi Taruya,
Nonlinear galaxy power spectrum for a mixed
dark matter model: perturbation theory approachand parameter forecasts,
Phys. Rev. D 80, 083528 (2009), arXiv:0907.2922[astro-ph]

IPMU09-0076
Sally V. Langford, J. Stuart, B. Wyithe and Edwin
L. Turner,
Photometric Variability in Earthshine Observations,Astrobiology 9(3), 305 (2009), arXiv:0904.0845 [astroph]

IPMU09-0085
Toshiya Imoto, Tadakatsu Sakai, Shigeki Sugimoto,
O(N) and USp(N) QCD from String Theory,
Prog. Theo. Phys. 122, 1433 (2009), arXiv:0907.2968[hep-th]

IPMU09-0077
Tanaka, M., Kawabata, K.S., Maeda, K., Iye, M.,
Hattori, T., Pian, E., Nomoto, K., Mazzali, P.A.,
Tominaga, N.,
Spectropolarimetry of the Unique Type Ib
Supernova 2005bf: Larger Asymmetry Revealed by
Later-Phase Data,
Astrophys. J. 699, 1119-1124 (2009), arXiv:0906.1062[astro-ph]

IPMU09-0086
William Klemm, Vikram Rentala, Zongguo Si and Kai
Wang,
Top-top pair at the CERN LHC

IPMU09-0087
Toru Kanzaki, Masahiro Kawasaki and Kazunori
Nakayama,
Effects of Dark Matter Annihilation on the Cosmic
Microwave Background,arXiv:0812.0219 [astro-ph]
IPMU09-0088
Koichi Hamaguchi, Fuminobu Takahashi, Ryuichiro
Kitano,Non-thermal Gravitino Dark Matter in Gauge
Mediation
JHEP 09, 127 (2009)
IPMU09-0089
Sunghoon Jung, Hitoshi Murayama, Aaron Pierce,
James D. Wells,
Top quark forward-backward asymmetry from newt-channel physics

Preprints

IPMU09-0070
Douglas Spolyar, Matthew Buckley, Katherine Freese,
Dan Hooper, and Hitoshi Murayama,
High Energy Neutrinos As A Test of Leptophilic
Dark Matter,
arXiv:0905.4764 [astro-ph]

IPMU09-0090
Wei Li, Tatsuma Nishioka, Tadashi Takayanagi,
Some No-go Theorems for String Duals of Nonrelativistic Lifshitz-like Theories
IPMU09-0091
Mina Aganagic, Hirosi Ooguri, Cumrun Vafa, Masahito
Yamazaki,Wall Crossing and M-Theory,
Nucl. Phys. B
IPMU09-0092
M. Ibe, Izawa K.-I., Y. Nakai,
Studying Gaugino Mass in Semi-Direct Gauge
Mediation,
arXiv:0907.2970 [hep-ph]
IPMU09-0093
Keiichi Maeda, Stefan Taubenberger, Jesper Sollerman,
Paolo A. Mazzali, Giorgos Leloudas, Ken'ichi Nomoto,
Kentaro Motohara,
Nebular Spectra and Explosion Asymmetry of TypeIa Supernovae,
Astrophys. J. 708, 1703 (2010)
IPMU09-0094
Keiichi Maeda, Friedrich K. Roepke, Michael Fink,
Wolfgang Hillebrandt, Claudia Travaglio, Friedel
Thielemann,
Nucleosynthesis in Two-Dimensional Delayed
Detonation Models of Type Ia Supernova
Explosions,Astrophys. J. 712, 624 (2010)
IPMU09-0095
C. Hagedorn , E. Molinaro, S.T. Petcov,
Majorana Phases and Leptogenesis in See-Saw
Models with A4 Symmetry
JHEP 0909, 115 (2009)99

IPMU09-0059
Etsuko Kawakami, Masahiro Kawasaki, Kazunori
Nakayama, and Fuminobu Takahashi,
Non-Gaussianity from Isocurvature Perturbations:
Analysis of Trispectrum,
JCAP 0909, 002 (2009), arXiv:0905.1552 [astro-ph]Preprints

IPMU09-0098
Jose Figueroa-O'Farrill,
M2-branes, Einstein manifolds and triple systems
IPMU09-0099
Shinji Mukohyama,
Can ghost condensate decrease entropy?,
arXiv:0908.4123 [hep-th]
IPMU09-0100
Cosimo Bambi, Katherine Freese, Rohta Takahashi,
Is the Carter-Israel conjecture correct?,
Arxiv:0908.3238

100

IPMU09-0101
Chuan-Ren Chen, Mihoko M. Nojiri, Seong Chan Parkand Jing Shu,
Kaluza-Klein Dark Matter After Fermi,
arXiv:0908.4317 [hep-ph]
IPMU09-0102
Gian F. Giudice, Tao Han, Kai Wang, Lian-Tao Wang,
Nearly Degenerate Gauginos and Dark Matter at
the LHC
IPMU09-0103
C.S. Kim, Kai Wang, Guo-huai Zhu,
Constraining Invisible Higgs from B¿ K+missing,
IPMU09-0104
Seong-Chan Park, Kai Wang, T.T. Yanagida,
Neutrino mass from a hidden world and its
phenomenological implications,Phys. Lett. B685, 309-312 (2010), arXiv:0909.2937[hep-ph]IPMU09-0105
Domenico Orlando and Susanne Reffert,
On the Perturbative Expansion around a Lifshitz
Point,
Phys. Lett. B 683, 61 & 8211, 68 (2010),
arXiv:0908.4429 [hep-th]
IPMU09-0106
H. Sung Cheon, Sin Kyu Kang, C. S. Kim,
Cosmic ray anomalies and DAMA experiment in an
Extended Seesaw Model

IPMU09-0108
Paul de Medeiros, Jose Figueroa-O'Farrill, Sunil
Gadhia, Elena Mendez-Escobar,
Half-BPS quotients in M-theory: ADE with a twist,
JHEP, arXiv:0909.0163 [hep-th]
IPMU09-0109
Masahiro Kawasaki, Katsuhiko Sato,
Cosmological Constraints on a Massive Neutrino,
Prog. Theo. Phys. 122. 205 (2009), arXiv:0907.2007[astro-ph]
IPMU09-0110
Daniel Krefl, Sara Pasquetti and Johannes Walcher,
The real topological vertex at work,
Nucl. Phys. B 833, 153-198 (2010), arXiv:0909.1324[hep-th]
IPMU09-0111
Hajime Takami and Katsuhiko Sato,
Does Galactic Magnetic Field Disturb theCorrelation of the Highest Energy Cosmic Rays
with their Sources?,
Astrophys. J., arXiv:0909.1532 [astro-ph]
IPMU09-0112
Satoshi Maeda, Shinji Mukohyama and Tetsuya
Shiromizu,
Primordial magnetic field from non-inflationary
cosmic expansion in Horava-Lifshitz gravity,
arXiv:0909.2149 [astro-ph]
IPMU09-0113
Cosimo Bambi, Katherine Freese, Tomohiro Harada,
Rohta Takahashi, Naoki Yoshida,
Accretion process in Kerr spacetimes with |a| > M
Phys. Rev. D 80, 104023 (2009)
IPMU09-0114
Damien A. Easson, Shinji Mukohyama, Brian A. Powell,Observational Signatures of Gravitational
Couplings in DBI Inflation
Phys. Rev. D81, 023512 (2010)
IPMU09-0115
N. Tominaga, S. Blinnikov, P. Baklanov, K. Nomoto,
Properties of Type II Plateau Supernova SNLS04D2dc: Multicolor Light Curves of Shock
Breakout and Plateau,
Astrophys. J. Lett. 705, 10 (2009), arXiv:0908.2162[astro-ph]

IPMU09-0116
Takaya Nozawa, et al.,Formation and Evolution of Dust in Type IIb
Supernova with Application to the Cassiopeia A
Supernova Remnant,
Astrophys. J., arXiv:0909.4145 [astro-ph]

IPMU09-0126
Chuan-ren Chen, Sourav K. Mandal, Fuminobu
Takahashi,
Gamma-ray Constraints on Hadronic and Leptonic
Activities of Decaying Dark Matter,
JCAP 01(2010)023, arXiv:0910.2639 [hep-ph]

IPMU09-0117
Yukinobu Toda,
Curve counting theories via stable objects II: DT/
ncDT/flop formula,
arXiv:0909.5129 [math]

IPMU09-0127
Masaomi Tanaka, Koji S. Kawabata, Masayuki
Yamanaka, Keiichi Maeda, Takashi Hattori, Kentaro
Aoki, Ken'ichi Nomoto, Masanori Iye, Toshiyuki Sasaki,
Paolo A. Mazzali, Elena Pian,
Spectropolarimetry of Extremely Luminous Type Ia
Supernova 2009dc: Nearly Spherical Explosion ofSuper-Chandrasekhar Mass White Dwarf,
Astrophys. J., arXiv:0908.2057 [astro-ph]

IPMU09-0118
Seong Chan Park, James Frost,
Warped Black Holes at the LHC and beyond,
IPMU09-0119
Seong Chan Park, Jing Shu,
Dark Matter and Collider Physics in Split-UED,
IPMU09-0120
Keiichi Maeda, Nozomu Tominaga, Hideyuki Umeda,
Ken'ichi Nomoto, Tomoharu Suzuki,
Supernova Nucleosynthesis and Stellar Populationin the Early Universe,
IPMU09-0121
Paul H. Frampton and Kevin Ludwick,
Number and Entropy of Halo Black Holes,
IPMU09-0122
Ho-Gyu Lee, Bon-Chul Koo, Dae-Sik Moon, Itsuki
Sakon, Takashi Onaka, Woong-Seob Jeong, Hidehiro
Kaneda, Takaya Nozawa, Takashi Kozasa,
AKARI Infrared Observations of the Supernova
Remnant G292.0+1.8: Unveiling Circumstellar
Medium and Supernova Ejetca,
Astrophys. J. 706, 441 (2009), arXiv:0910.0922 [astroph]
IPMU09-0123
Paul H. Frampton,
Alternative Version of Chiral Color as Alternative
to the Standard Model,
IPMU09-0124
Ryosuke Sato, T.T.Yanagida, Kazuya Yonekura,
Relaxing the constraint on the number ofmessengers in a low-energy gauge mediation,
IPMU09-0125
Hirotaka Hayashi, Teruhiko Kawano, Yoichi Tsuchiya
and Taizan Watari,
Flavor Structure in F-theory Compactifications,
arXiv:0910.2762 [hep-th]

IPMU09-0128
M. Yamanaka, K. S. Kawabata, K. Kinugasa, M.
Tanaka, A. Imada, K. Maeda, K. Nomoto, A. Arai, S.
Chiyonobu, Y. Fukazawa, O. Hashimoto, S. Honda, Y.
Ikejiri, R. Itoh, Y. Kamata, N. Kawai, T. Komatsu,
D. Kuroda, H. Miyamoto, S. Miyazaki, O. Nagae, H.
Nakaya, T. Ohsugi, T. Omodaka, N. Sakai, M. Sasada,
M. Suzuki, H. Taguchi, H. Takahashi, H. Tanaka, M.
Uemura, T. Yamashita, K. Yanagisawa, M. Yoshida,
Early Phase Observations of Extremely Luminous
Type Ia Supernova 2009dc,
Astrophys. J. Lett., arXiv:0908.2059 [astro-ph]
IPMU09-0129
Shin Nakamura, Hirosi Ooguri, Chang-Soon Park,
Gravity Dual of Spatially Modulated Phase,to be determined, , http://arxiv.org/abs/0911.0679
IPMU09-0130
Jing Shu and Tim Tait and Kai Wang,
Explorations of the Top quark forward-backward
asymmetry at the Tevatron,
Phys. Rev. D 81, 034012 (2010), arXiv:0911.3237[hep-ph]IPMU09-0131
Hajime Takami, Takahiro Nishimichi, Katsuhiko Sato,
Systematic Survey of the Correlation between
Northern HECR events and SDSS Galaxies,
JCAP, arXiv:0910.2765 [astro-ph]
IPMU09-0132
Kentaro Nagao, Masahito Yamazaki,
The Non-commutative Topological Vertex and Wall
Crossing Phenomena,
arXiv:0910.5479 [hep-th]
IPMU09-0133
Masahiro Kawasaki, Toyokazu Sekiguchi,
Probing the primordial power spectra with
inflationary priors,
JCAP,

Preprints

IPMU09-0097
William Klemm, Hai-shan Liu, Kai Wang,
Probing spin of the resonance unitarizing WW
Scattering at the LHC

IPMU09-0107
Chuan-Hung Chen, C. S. Kim,
Sommerfeld Enhancement for Dark Matter
Annihilation from Unparticle Exchange

101

IPMU09-0096
Paul de Medeiros, Jose Figueroa-O'Farrill, Elena
Mendez-Escobar,
Superpotentials for superconformal Chern-Simons
theories from representation theory,
J Phys A, arXiv:0908.2125 [hep-th]

IPMU09-0136
Keisuke Izumi and Shinji Mukohyama,
Stellar center is dynamical in Horava-Lifshitz
gravity,
JHEP,
IPMU09-0137
Domenico Orlando, Susanne Reffert, Nicolai
Reshetikhin,
On domain wall boundary conditions for the XXZ
spin Hamiltonian,arXiv:0912.0348 [math-ph]102

IPMU09-0138
Kyoji Saito and Tadashi Ishibe,
Monoids in the fundamental groups of thecomplement of logarithmic free divisors in C 3,
IPMU09-0139
Qing-Hong Cao, C. B. Jackson, Wai-Yee Keung, Ian
Low, Jing Shu,
The Higgs Mechanism and Loop-induced Decaysof a Scalar into Two Z Bosons,Phys.Rev.D., arXiv:0911.3398 [hep-ph]
IPMU09-0140
Kazunori Nakayama and Fuminobu Takahashi,
The Affleck-Dine Mechanism in Conformally
Sequestered Supersymmetry Breaking,Phys. Lett. B, arXiv:0911.5326 [hep-ph]
IPMU09-0141
Kenneth Intriligator and Matthew Sudano,
General Gauge Mediation with Gauge Messengers,
IPMU09-0142
Mina Aganagic and Masahito Yamazaki,
Open BPS Wall Crossing and M-theory,
arXiv:0911.5342 [hep-th]
IPMU09-0143
Sourav K. Mandal, Matthew R. Buckley, Katherine
Freese, Douglas Spolyar, Hitoshi Murayama,
Cascade Events at IceCube+DeepCore asa Definitive Constraint on the Dark Matter
Interpretation of the PAMELA and Fermi
Anomalies,
Phys. Rev. D 81, 043508 (2010), arXiv:0911.5188[hep-ph]IPMU09-0153
Alexander Kusenko, Anupam Mazumdar,
Gravitational waves from fragmentation of aprimordial scalar condensate into Q-balls,
Phys. Rev. Lett. 101, 211301 (2008), arXiv:0807.4554[gr-qc]

IPMU09-0145
Motoi Endo, Koichi Hamaguchi, Sho Iwamoto,
Lepton Flavor Violation and Cosmological
Constraints on R-parity Violation,
arXiv:0912.0585 [hep-ph]

IPMU09-0154
George M. Fuller, Alexander Kusenko, Kalliopi Petraki,
Heavy sterile neutrinos and supernova explosions,Phys. Lett. B 670, 281 (2009), arXiv:0806.4273 [astroph]

IPMU09-0146
Michael Loewenstein, Alexander Kusenko,
Dark Matter Search Using Chandra Observationsof Willman 1, and a Spectral Feature Consistent
with a Decay Line of a 5 keV Sterile Neutrino,
arXiv:0912.0552 [astro-ph]

IPMU09-0155
Alexander Kusenko, Bhabani Prasad Mandal, Alok
Mukherjee,
Delayed pulsar kicks from the emission of sterile
neutrinos,
Phys. Rev. D 77, 123009 (2008), arXiv:0801.4734[astro-ph]

IPMU09-0147
Ian M. Shoemaker, Alexander Kusenko,
Gravitino dark matter from Q-ball decays,
Phys. Rev. D 80, 075021 (2009), arXiv:0909.3334[astro-ph]
IPMU09-0148
Alexander Kusenko,
Sterile neutrinos: the dark side of the lightfermions,
Phys. Rept. 481,1 (2009), arXiv:0906.2968 [hep-ph]
IPMU09-0149
Alexander Kusenko, Ian M. Shoemaker,
Neutrinos from the terrestrial passage ofsupersymmetric dark matter Q-balls,
Phys. Rev. D 80, 027701 (2009), arXiv:0905.3929[astro-ph]
IPMU09-0150
Warren Essey, Alexander Kusenko,
A new interpretation of the gamma-ray
observations of active galactic nuclei,
Astropart. Phys. 33, 81-85 (2010), arXiv:0905.1162[astro-ph].
IPMU09-0151
Alexander Kusenko, Anupam Mazumdar, Tuomas
Multamaki,
Gravitational waves from the fragmentation of asupersymmetric condensate,
Phys. Rev. D 79, 124034 (2009), arXiv:0902.2197[astro-ph]
IPMU09-0152
Ian M. Shoemaker, Alexander Kusenko,
The ground states of baryoleptonic Q-balls insupersymmetric models,
Phys. Rev. D 78, 075014 (2008), arXiv:0809.1666[astro-ph]

IPMU09-0156
Koichi Hamaguchi, Eita Nakamura, Satoshi Shirai,
Tsutomu T. Yanagida,
Low-Scale Gauge Mediation and Composite
Messenger Dark Matter,
IPMU09-0157
Paul Frampton, Masahiro Kawasaki, Fuminobu
Takahashi, Tsutomu T. Yanagida,
Primordial Black Holes as All Dark Matter,
arXiv:1001.2308 [hep-ph]
IPMU09-0158
Issha Kayo, Naohisa Inada, Masamune Oguri, Tomoki
Morokuma, Patrick B. Hall, Christopher S. Kochanek,
Donald P. Schneider,
Eight New Quasar Lenses from the Sloan Digital
Sky Survey Quasar Lens SearchD",
AJ, arXiv:0912.1462 [astro-ph]
IPMU09-0159
Ryosuke Sato, Kazuya Yonekura,
Low Scale Direct Gauge Mediation with
Perturbatively Stable Vacuum,arXiv:0912.2802 [hep-ph]
IPMU09-0160
Yukinobu Toda,
On a computation of rank two Donaldson-Thomas
invariants,
arXiv:0912.2507 [math]
IPMU09-0161
Masahiro Ibe and Tsutomu T. Yanagida,
Neutralino Dark Matter in Gauge Mediation inLight of CDMS-II,

IPMU09-0162
Qing-Hong Cao, Chuan-Ren Chen, Chong Sheng Li
and Hao Zhang,
Effective dark matter theory - relic density, CDMS
II, Fermi LAT and LHC,IPMU09-0163
Motoi Endo, Satoshi Shrai, Kazuya Yonekura,
Phenomenological Aspects of Gauge Mediation
with Sequestered Supersymmetry Breaking in lightof Dark Matter Detection,
IPMU09-0164
Cosimo Bambi,
Numerical simulations of the accretion process in
Kerr space-times with arbitrary value of the Kerr
parameter,
arXiv:0912.4944 [gr-qc]
IPMU09-0165
Yu Nakayama,
Anisotropic scale invariant cosmology,

Preprints

Preprints

IPMU09-0135
Paul Frampton and Jing Shu and Kai Wang,
Axigluon as Possible Explanation for ttbar Forward
Backward Asymmetry at Tevatron,
Phys. Lett. B 683:294-297,2010,arXiv:0911.2955 [hep-ph]

IPMU09-0144
Koji Ishiwata, Masahiro Kawasaki, Kazunori Kohri,
Takeo Moroi,
Weak-scale Right-handed Sneutrino and Big-Bang
Nucleosynthesis,
JCAP,

IPMU09-016
6Izutani, Natsuko; Umeda, Hideyuki; Tominaga,
Nozomu,Explosive Nucleosynthesis of Weak R-Process
Elements in Extremely Metal-Poor Core-Collapse
Supernovae,
Astrophys. J. 692, 1517(2009), arXiv:0810.5661[astro-ph]
IPMU09-0167
Nomoto, Ken'ichi; Wanajo, Shinya; Kamiya, Yasuomi;
Tominaga, Nozomu; Umeda, Hideyuki,
Chemical Yields from Supernovae and Hypernovae,
IPMU09-0168
Damien A. Easson,Mustapha Ishak, Jacob
Moldenhauer, John Thompson,
Supernovae, BAO, and CMB surface distanceconstraints on f (G ) higher order gravity models,
Phys. Rev. D,
IPMU10-0001
Cosimo Bambi,
Testing the Black Hole Paradigm with Future
Observations of SgrA*,
IPMU10-0002
Jing Shu, Peng-fei Yin, Shou-hua Zhu,
Neutrino Constrains on Inelastic Dark Matter after
CDMS II,
Phys. Rev. D,
IPMU10-0003
Tsz Yan Lam, Ravi K. Sheth, Vincent Desjacques,
The initial shear field in models with primordial
local non-Gaussianity and implications for halo
and void abundance,
MNRAS 399, 1482 (2009), arXiv:0905.1706 [astro-ph]103

IPMU09-0134
Tatsuma Nishioka, Shinsei Ryu and Tadashi Takayanagi,
Holographic Superconductor/Insulator Transition
at Zero Temperature,

IPMU10-0005
Chiaki Kobayashi, Ken'ichi Nomoto,
The Role of Type Ia Supernovae in Chemical
Evolution I: Lifetime of Type Ia Supernovae andMetallicity Effect,
Astrophys. J. 707, 1466-1484 (2009), arXiv:0801.0215[astro-ph]

IPMU10-0016
Daniel Krefl,
Wall Crossing Phenomenology of Orientifolds,
arXiv:1001.5031 [hep-th]

IPMU10-0006
Chiaki Kobayashi,
Chemo-dynamical simulations of galaxies,
IPMU10-0007
Chiaki Kobayashi,
Numerical Simulations of Elliptical Galaxies,

104

IPMU10-0008
Louis Funar, Toshitake Kohno,
On images of quantum representations ofmapping class groups,
Quantum Topology, arXiv:0907.0568 [math]
IPMU10-0009
Toshitake Kohno,
The volume of a hyperbolic simplex and iterated
integrals,
IPMU10-0010
Toshitake Kohno,
Loop spaces of configuration spaces and link
homotopy invariants,
IPMU10-0011
Shinsei Ryu, Tadashi Takayanagi,
Topological Insulators and Superconductors fromD-branes,
arXiv:1001.0763 [hep-th]
IPMU10-0012
Ryuichiro Kitano, Hirosi Ooguri, and Yutaka Ookouchi,
Supersymmetry Breaking and Gauge Mediation,
IPMU10-0013
Yu Nakayama,
Schrodinger-like (dilaton-)garvity,
IPMU10-0014
Masamune Oguri, Masahiro Takada, Nobuhiro Okabe,
Graham P. Smith,Direct measurement of dark matter halo ellipticity
from two-dimensional lensing shear maps of 25
massive clusters,
Phys. Rev. D, 80, 083528 (2009)

IPMU10-0017
Masahiro Kawasaki, Koichi Miyamoto, Kazunori
Nakayama,
Gravitational waves from kinks on infinite cosmic
strings,
Phys. Rev. D,
IPMU10-0018
Tomonori Furukawa, Shuichiro Yokoyama, Kiyotomo
Ichiki, Naoshi Sugiyama, Shinji Mukohyama,
Ghost Dark Matter,
arXiv:1001.4634 [astro-ph]
IPMU10-0019
Cosimo Bambi, Tomohiro Harada, Rohta
Takahashi, Naoki Yoshida,
Outflows from accreting super-spinars,
Phys. Rev. D 81, 104004 (2010)
IPMU10-0020
Kyoungchul Kong, Seong Chan Park, Thomas G. Rizzo,
Collider phenomenology of split-UED,
IPMU10-0021
Yu Nakayama,
Universal time-dependent deformations ofSchrodinger geometry,
IPMU10-0022
Hiroyuki Hirashita, Takaya Nozawa, Huirong Yan,
Takashi Kozasa,
Effects of grain shattering by turbulence on
extinction curves in starburst galaxies,
MNRAS, arXiv:1001.2606 [astro-ph]
IPMU10-0023
Masahito Yamazaki,
Crystal Melting and Wall Crossing Phenomena,
TBA, arXiv:1002.1709 [hep-th]
IPMU10-0024
Takashi Hiramatsu, Masahiro Kawasaki, Ken'ichi
Saikawa,
Gravitational Waves from Collapsing Domain
Walls,
Phys. Rev. D,

IPMU10-0025
Amihay Hanany, Domenico Orlando, Susanne Reffert,
Sublattice Counting and Orbifolds,
arXiv:1002.2981 [hep-th]
IPMU10-0026
Paul H. Frampton,
Intermediate Black Holes as Dark Matter,
arXiv:0907.1704v1 [hep-th]
IPMU10-0027
Atsushi Nishizawa, Masahiro Takada, T. Hamana, H.
Furusawa,
The impact of photometric redshift errors on weaklensing tomography: a clipping method of thecatastrophic errors,
Astrophys. J., arXiv:1002.2476 [astro-ph].
IPMU10-0028
Takashi Hiramatsu, Masahiro Kawasaki, Fuminobu
Takahashi,
Numerical study of Q-ball formation in gravity
mediation,
IPMU10-0029
T.T.Yanagida and Kazuya Yonekura,Semi-direct Gauge Mediation in Conformal
Windows of Vector-like Gauge Theories,
IPMU10-0030
Y.-T. Lin, R.B. Partridge, J. Pober, K. El Bouchefry,
S. Burke, J. Klein, J. Coish, K. Huffenberger,
Spectral Energy Distribution of Radio Sourcesin Nearby Clusters of Galaxies: Implications for
Sunyaev-Zel'dovich Effect Surveys,
Astrophys. J. 694, 992 (2009), arXiv:0805.1750 [astroph]
IPMU10-0031
Y. Shen, M.A. Strauss, N.P. Ross, P.B. Hall, Y.-T. Lin,
G.T. Richards, D.P. Schneider, D.H. Weinberg, A.J.
Connolly, X. Fan, J.F. Hennawi, F. Shankar, D.E.
Vanden Berk, N.A. Bahcall, R.J. Brunner,
Quasar Clustering from SDSS DR5: Dependenceson Physical Properties,
Astrophys. J. 697, 1656 (2009), arXiv:0810.4144[astro-ph]
IPMU10-0032
Yen-Ting Lin, Jeremiah P. Ostriker, Christopher J. Miller,
A New Test of the Statistical Nature of theBrightest Cluster Galaxies,
Astrophys. J., arXiv:0904.3098 [astro-ph]
IPMU10-0033
N. Sehgal, P. Bode, S. Das, C. Hernandez-Monteagudo,
K. Huffenberger, Y.-T. Lin, J. Ostriker,H. Trac,
Simulations of the Microwave Sky,
Astrophys. J. 709, 920 (2010), arXiv:0908.0540 [astroph]

IPMU10-0034
A. Hincks et al,
The Atacama Cosmology Telescope (ACT): BeamProfiles and First SZ Cluster Maps,
Astrophys. J., arXiv:0907.0461 [astro-ph]
IPMU10-0035
J. Fowler et al,
The Atacama Cosmology Telescope: A
Measurement of the 600 < ℓ < 8000 Cosmic
Microwave Background Power Spectrum at 148
GHz,
Astrophys. J., arXiv:1001.2934 [astro-ph]
IPMU10-0036
Damien Easson, Paul H. Frampton and George F.
Smoot,
Entropic Accelerating Universe,
IPMU10-0037
S. Abe, S. Enomoto, K. Furuno, Y. Gando, H. Ikeda,
K. Inoue, Y. Kibe, Y. Kishimoto, M. Koga, Y. Minekawa,T. Mitsui, K. Nakajima, K. Nakajima, K. Nakamura, M.
Nakamura, I. Shimizu, Y. Shimizu, J. Shirai, F. Suekane,
A. Suzuki, Y. Takemoto, K. Tamae, A. Terashima, H.
Watanabe, E. Yonezawa, S. Yoshida, A. Kozlov,
H. Murayama, J. Busenitz, T. Classen, C. Grant, G.
Keefer, D. S. Leonard, D. McKee, A. Piepke, T. I.
Banks, T. Bloxham, J. A. Detwiler, S. J. Freedman,
B. K. Fujikawa, F. Gray, E. Guardincerri, L. Hsu, K.
Ichimura, R. Kadel, C. Lendvai, K.-B. Luk, T. O'Donnell,
H. M. Steiner, L. A. Winslow, D. A. Dwyer, C. Jillings,
C. Mauger, R. D. McKeown, P. Vogel, C. Zhang, B. E.
Berger, C. E. Lane, J. Maricic, T. Miletic, M. Batygov,
J. G. Learned, S. Matsuno, S. Pakvasa, J. Foster, G. A.
Horton-Smith, A. Tang, S. Dazeley, K. E. Downum, G.
Gratta, K. Tolich, W. Bugg, 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,
Production of radioactive isotopes through cosmic
muon spallationin KamLAND,
Phys. Rev. C 81, 025807 (2010),
arXiv:0907.0066 [hep-ex]
IPMU10-0038
Takeshi Kobayashi and Shinji Mukohyama,
Effects of Light Fields During Inflation,
arXiv:1003.0076 [astro-ph]
IPMU10-0039
Damien Easson, Paul Frampton, George Smoot,Entropic Inflation,
IPMU10-0040
Paul H. Frampton and Xiao-Gang He,
Unitarity Boomerang,
IPMU10-0041
Domenico Orlando, Linda I. Uruchurtu,
Warped anti-de Sitter spaces from braneintersections in type II string theory,

Preprints

IPMU10-0015
Jacek Guzik, Bhuvnesh Jain, Masahiro Takada,
Tests of gravity from imaging and spectroscopic
surveys,Phys. Rev. D 81, 023503 (2010), arXiv:0906.2221[astro-ph]105

Preprints

IPMU10-0004
Tsz Yan Lam, Vincent Desjacques, Ravi K. Sheth,
The nonlinear redshift space probability
distribution function in models with local
primordial non-Gaussianity,
MNRAS 402, 2397 (2010), arXiv:0908.2285 [astro-ph]Preprints

IPMU10-0043
Dong Zhe, Tao Han, Min-xin Huang, Gary Shiu,
Top Quarks as a Window to String Resonances,
IPMU10-0044
Warren Essey, Oleg E. Kalashev, Alexander Kusenko,
John F. Beacom,
Secondary photons and neutrinos from cosmic
rays produced by distant blazars,
Phys. Rev. Lett. 104,141102 (2010), arXiv:0912.3976[astro-ph]
IPMU10-0045
Satoshi Shirai, Masahito Yamazaki, Kazuya Yonekura,
Aspects of Non-minimal Gauge Mediation,
arXiv:1003.3155 [hep-ph]106

IPMU10-0046
Masahiro Kawasaki, Koichi Miyamoto, Kazunori
Nakayama,
B-mode polarization induced by gravitational
waves from kinks on infinite cosmic strings,

IPMU10-0047
Paul Howard Frampton,
Black Holes Constitute All Dark Matter,
IPMU10-0048
Paul Howard Frampton,
Primordial Black Holes Constitute All Dark Matter,
IPMU10-0049
Yong-Seon Song, Issha Kayo,
Decomposition of Spectra from Redshift Distortion
Maps,
arXiv:1003.2420 [astro-ph]
IPMU10-0050
Satoshi Kondo, Seidai Yasuda,
Product structures in motivic cohomology andhigher Chow groups,
IPMU10-0051
Satoshi Kondo, Seidai Yasuda,
On two higher Chow groups of a scheme over afinite field,
PMU10-0052
T. Kugo and T.T. Yanagida,
Supersymmetric Nonlinear Sigma Models Coupled
to Supergravity,

We have been trying hard to convey
the importance and excitement of thescience we are pursuing to general publicthrough public lectures and a variety ofoutreach programs, often putting very best
researchers of the institute including thecenter director and principal investigators.
We organized all of our public lectures witha plenty of discussion time after the lectureso that attendants were able to talk directlywith the speakers. Up to now, all of our ■ Hitoshi Murayama answers questions from thepublic lectures have been very successful. audience during a public lecture.
We have been noticing that general public isvery curious about the universe and anxious to be part of our scientific quest.
This year, we started the outreach program which are specifically aimed toward attracting
junior high school and high school students into physics and mathematics. We hosted a tour
and discussion event for female junior high school and high school students. We hosted ascience camp ''New Encounter of Modern Mathematics and Modern Physics'' for high school
students.
We began to have active communication with public relation groups of otherorganizations both in Japan and abroad. Some of our public lectures were jointly hosted withother institutions as a result of this type of communication. The program for female students
was a part of a whole UT Science Faculty activity. In April, we hosted a meeting of InterAction
collaboration which is a worldwide network of communication specialists working at particle
physics and astrophysics laboratories.
Our effort in outreach program is producing visible results. We view the approval of the
SuMIRe proposal by the Council for Science and Technology Policy not just as a recognition ofits scientific importance, but also as a result of our persistent efforts to convince the governmentand communities that high precision astronomicalmeasurements have great potential to strengthen
the scientific and technological basis of Japan.
Effect from a widely publicized ''Government
Revitalization Unit Hearing''to review governmentfunded research programs, that took place inNovember, was minimal to our institute. During
this process, more than 900 letters were sent to thegovernment in support of IPMU, some of whichfrom people who attended our outreach program.
■ IPMU hosted InterAction collaboration
meeting.

Outreach and Public Communications

IPMU10-0042
Yu-ichi Takamizu, Shinji Mukohyama, Misao Sasaki,
Yoshiharu Tanaka,
Non-Gaussianity of superhorizon curvature
perturbations beyond delta N formalism,

107

13.

Outreach andPublic Communications

We hosted the following public lectures.

Attracting female students to science is an important task for us. In August, we organized,
as a part of UT Science Faculty project, a special event for female junior high school and highschool students and their parents (optional) to tour the B-factory accelerator at KEK, the site ofexperimental verification of Kobayashi-Maskawa theory of CP violation. Some 20 students andtheir parents joined the event. The tour was followed by lectures and discussion with scientists
including IPMU female researchers. It is also important to bring the subject of mathematics

The Biggest Magic in the History of the Universe - Missing Antimatter, Hitoshi Murayama,
April 18, 2009, Tsukuba (IPMU-KEK Special Talk Show on Particle Physics)2.

Birth of Stars and Galaxies from Dark Universe, Naoki Yoshida, April 18, 2009, Kashiwa(ICRR-IPMU Joint Public Lecture ''Let's Talk about the Universe'')3.

Tokui - The singularities in the universe, the Big Bang and Black Holes, Hitoshi Murayama,
April 25, 2009, Yasuda Hall

4.

The Dark Side of the Universe, Michael Turner (Univ. Chicago), Kashiwa Campus, June 24,
2009

5.

Exploring the Universe with Gravitational Waves, Katsuhiko Sato, June 30, 2009, Tokyo(Fujiwara Seminar ''Worldwide Network for Gravitational Wave'')

6.

A Story of Milky Way Galaxy, Naoki Yoshida, July 7, 2009, Kashiwa

7.

''Soramiru'' (Looking into the Universe), Hitoshi Murayama, July 13, 2009, Komaba
Campus8.

Further than the Edge of the Universe, Hitoshi Murayama
Universe seen from Underground Kamiokande, Masayuki Nakahata
October 10, 2009, Tokyo (ICRR-IPMU Joint Public Lecture)9.

Seeing the Dark Sector of the Universe with Gravitational Lensing, Masahiro Takada,
October 30, 2009, Kashiwa Campus (UT Kashiwa Campus Open House)

10.

SORAHAKU 2009 - Will the Universe Ever End?, Hitoshi Murayama, December 6, 2009,
Tokyo International Forum

11.

Exploring Dark Age of the Universe, Naoki Yoshida, December 20, 2009, Komaba
Campus12.

Miracle of String Theory, Shigeki Sugimoto
Searching for Dark Matter - dark hoarse of the universe-, Masahiro Takada
Wrinkles and Seeds of the Universe, Hitoshi Murayama
January 20, February 20, March 6, 2010, Science Cafe at Tama Rokuto Scinece Museum■ Program of tour and discussion for female students
and their parents.

■ Science camp for high school students ''New
encounter of modern mathematics and modern physics''
109

1.

Outreach and Public Communications

Programs for Junior High School and High School Students

108

Outreach and Public Communications

Public Lectures

into outreach program especially for young students. A recent government report expressed
a concern that majority of young Japanese today study mathematics just as requirements or atool for solving problems in other fields, but not as an attractive research subject of its own. We
want to play a challenging role to reverse this trend. As a first step we hosted, jointly with JST,a science camp of mathematics for high school students in March 2010. We were pleasantly
surprised to receive a large number of enthusiastic applications from all over Japan for thecapacity of only 20. The students were fascinated to learn different geometries which result inthe sums of three inner angles of the triangle being different from 180 degrees, or to ''countinfinity'' using a toy model for Bose particles and Fermi particles.

IPMU NEWS and Video Clips
We published 3 editions of IPMU news, covering a wide range of information including
hosted conferences and seminars, research highlight, introduction of new members. They also
feature interesting related research topics. We broadcasted 3 more short video clips, in which
IPMU scientists explain technical scientific terms to general public in just one minute, on thewebsite.

Outreach and Public Communications■ IPMU Arts Society held ''Searching for the Other
Physics - An Art Exhibition at a Science Lab - .'' [January
2010]

111

Outreach and Public Communications
110

Communications in Diﬀerent Ways

■ Mark Vagins posed as a Santa Claus at a Christmas
party of ''Donguri Hoikuen'', the Kashiwa Campus
nursery. [December 2009]■ IPMU staff took extra precaution at a May 2009
Focus Week that was held in the middle of swine flu
outbreak.[May 2009]■ Children from Toyofuta Elementary School listen to
IPMU researchers of various nationalities who explained
their work while visiting Tokatsu Techno Plaza locatedright next to Kashiwa campus. [May 2009]■ Members of IPMU volunteer group, who regularly
assist our work in dealing with foreign staff and visitors,
joined the coffee break at a June conference. [June2009]■ Children of Matsuba kindergarten listen to Naoki
Yoshida's explanation about a miracle of the eclipse.
[July 2009]■ Simeon Hellerman conducts newly formed IPMU
orchestra at the reception which was held after theinauguration ceremony for the new building. [February
2010]

112

Outreach and Public Communications

IPMU ANNUAL REPORT 2009

IPMU
Annual Report
2009

April 2009 — March 2010

April 2009 — March 20105-1-5 Kashiwanoha, Kashiwa, Chiba 277-8583, Japan
Tel: +81-4-7136-4940 Fax: +81-4-7136-4941
http://www.ipmu.jp/

Institute for the Physics and Mathematics of the Universe (IPMU)

Institute for the Physics and Mathematics of the Universe (IPMU)
The University of Tokyo