HAD_01:

Measurements of Jets andPhotons in Heavy Ion Collisions
at the Highest Beam Energy
during the LHC-Run 2 by ALICE
Tatsuya Chujo (Univ. of Tsukuba)
2016 Joint Workshop of FKPPL and TYL/FJPPL(Particle Physics Laboratories) @ KIAS
May 18, 2016
KIAS, Seoul,Had_01: project goals• LHC heavy ion physics at ALICE
experiment.
• Perform high precision measurements
for the quantitative determination ofQPG properties at the highest
temperature.
• Run-1 (2009-2013) and Run-2(2015-2018) data.
• Jets and photons measurements,
Japan and France in ALICE, by EMCal/
DCal detectors, which has been built
within the framework of France-Japancollaboration.
2016 Joint Workshop of FKPPL and TYL/FJPPL @ KIAS, May 18, T. Chujo (U. Tsukuba)

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Courtesy of Paul Sorensen and Chun Shen

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Probing new physics by ALICE-DCal
PHOS

DCal!"#$%%&'()*++%!"#,%%-&.()%/01(&2(%3*)*

45*+%(6/7.%8936+7(%:%5;<=%>?7-9.7%&'()*++*)&9'@!"#$%&'()*+(,+-%./(ALICE DCal
New electromagnetic calorimeterfor jet and photon physics, byUS, Japan, France, China, Italy
・T. Chujo：EMCal・DCal deputy project leader

3&BG7)%F&)0%8*20%29'7%.*3&*)&9'%0*+&(-#+1()*+(1)"#&'23(4#.52+-($.26(7!"#$%&'"'$()*'&+,>)079.1@)"9&1%:#&()#(9(;+9623(4#.52+-(5"#$+(7-./-$%&'"'$()*'&01

A?BA?%,C"!%D7E%F&)0%3&BG7)%%
2*'3&3*)7%><6'B!%3*)*H%!"#,@

From discovery to determination of properties
Quark Gluon Plasma (QGP) by using jets and photons! Search for the gluon radiation, Equation of state of QGP!

Overview of ALICE 2015 data taking

2016 Joint Workshop of FKPPL and TYL/FJPPL @ KIAS, May 18, T. Chujo (U. Tsukuba)

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ALICE data taking profile: Run-2 vs. Run-1

2016 Joint Workshop of FKPPL and TYL/FJPPL @ KIAS, May 18, T. Chujo (U. Tsukuba)

6Project report(FY2015)2016 Joint Workshop of FKPPL and TYL/FJPPL @ KIAS, May 18, T. Chujo (U. Tsukuba)

First year of DCal, jet/photon L1 trigger
Jet trigger efficiency

H.Yokoyama, R. Hosokawa, R. Guernane, J. Kral, T. Chujo• DCal and L1 trigger: Operational in 2015, first year ofphysics data taking.
• Grenoble LPSC - Tsukuba- Jyvaskyla team for L0/L1 trigger• Tsukuba: EMCal/ DCal /PHOS Level-1 jet & photontrigger, FPGA firmware development.
• Reasonable turn-on curve on jet trigger.
• Rejection factor 104 at 30 GeV jet.
• Physics data analysis is on-going.

! DCal + PHOS trigger patch (H. Yokoyama)

2016 Joint Workshop of FKPPL and TYL/FJPPL @ KIAS, May 18, T. Chujo (U. Tsukuba)8

!0-jet correlations to determine path length dep. of energy loss

D. Watanabe (PhD)!0-jet correlations in pp and PbPb

• Daisuke Watanabe (Tsukuba), obtained PhD in 2016, March.
• Developed by FJPPL, presented at QM2015 (Kobe)• Study of jet structure by triggering high pT "0 hadrons.
• pp 7 TeV finished, and Pb-Pb 2.76 TeV finalizing for the publication.
2016 Joint Workshop of FKPPL and TYL/FJPPL @ KIAS, May 18, T. Chujo (U. Tsukuba)

946*+%47I.77%A.9I.*8%>A0C4@%
J.7'9?+7%KC%B%KC%9-%D(6L6?*• !"#$%&'#()$*+#",*-.(/0%,#12(3%4"*#"5(6$7()$*+#",*-.(%8(9,4:4&6;(6<"##7(-%(,-6"-()07%G9&')%396?+7%37I.77%/.9I.*8%>A0C4@%&'%!"#,C%• =41#"+*,#7(&.(->%(*$,?-4-#,(/!"#$%&'#(6$7(9,4:4&65(%$(,6@#(-2#,*,(-%1*A,B(• C2BD(8"%@(&%-2(!"#$%&'#(6$7(9,4:4&6(6E#"(,4AA#,,84'(7#8#$,#B(• )FG(/*$(0616$#,#5H(2I1HJJ>>>B16,B-,4:4&6B6ABK1J%+#"+*#>J1"%<"6@J7%4&'#L7#<"##J(• DF9%()637')((*$(-2*,(1"%<"6@(>*-2*$(-2#(8"6@#>%":(%8(30CCGH(• M&.9L&%N9L91*8*(/)B(9,4:4&65H(,-6"-#7(M1"*'(NOPQB(• R0#-(,1#A-"6(6-(QBON(9#S(*$(C&LC&(/MGTUV5W(• D#8#$A#(#X1#A-#7(=#1B(NOPY(• <&)(61*%M9(9L*F*(/)B(9,4:4&65H(,-6"-#7(=#1B(NOPQB(• R34''(K#-(19(,1#A-"6(*$(PZ(9#S(1L1W(6$7(RK#-L267"%$(A%""#'6?%$,(*$(C&C&/84-4"#5WPOALICE Calo meeting in Osaka (2015)• Discussed EMCal/DCal/ PHOS, jet andphoton physics, within FJPPL, including
Russian collaboration.
• 2.5 days, around 30 participants.
• https://indico.cern.ch/event/439906/• Next meeting in Tokyo 2016, May-June.
• https://indico.cern.ch/event/506125/

2016 Joint Workshop of FKPPL and TYL/FJPPL @ KIAS, May 18, T. Chujo (U. Tsukuba)

11Project proposal(FY2016)2016 Joint Workshop of FKPPL and TYL/FJPPL @ KIAS, May 18, T. Chujo (U. Tsukuba)

Keys to understand dE/dx in QCD plasma
1. Control path length (parton scattering point)
2. Energy calibration (e.g. #-jet)
3. Detection of medium response by jet (parton)
propagation!"#$%&'()*+(,+-%./(• Within the framework of FJPPL and FCPPL, wedeveloped the new analysis team in ALICE, called
AAF (ALICE Asian France) collaboration.
0*+&(-#+1()*+(1)"#&'23(4#.52+-($.26(7!"#$%&'"'$()*'&+• First results on jet at “Hard Probe 2016 (Wuhan)”,)"9&1%:#&()#(9(;+9623(4#.52+-(5"#$+(7-./-$%&'"'$()*'&0and continue for the future jet/ photon analysis.
2016 Joint Workshop of FKPPL and TYL/FJPPL @ KIAS, May 18, T. Chujo (U. Tsukuba)

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QGP ﬂuid + jet model
Y. Tachibana, T. Hirano(QM2015)

1. Mach cone as a hydrodynamic response• Fluidity of the bulk medium• Properties of QGP e.g. sound velocity, viscosity, stopping power,etc.
2. Bulk dynamics of the QGP in jet events in HIC• Hydrodynamic response to jets in the expanding QGP• Consequent spectra of particles from the bulk medium

14HAD_01: Project Members

2016 Joint Workshop of FKPPL and TYL/FJPPL @ KIAS, May 18, T. Chujo (U. Tsukuba)

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HAD_01: Funding request (2015-2016)

FranceJapan* Requested same amount as last year for the travel support in France and Japan,
most for the students and young researchers.
2016 Joint Workshop of FKPPL and TYL/FJPPL @ KIAS, May 18, T. Chujo (U. Tsukuba)

16Summary✓ 2015:– Successful first ALICE DCal data taking with L1, developed by FJPPL– Started double degree PhD program between Grenoble - Tsukuba, two students
enrolled.
– Presented jet results (Run-1) developed by FJPPL at QM2015– Held “ALICE Calo meeting in Osaka (2015)” within FJPPL– New “AAF analysis team” formed by FJPPL, FCPPL, work on Run-2 data.
– D. Watanabe obtained Ph.D (2016, March, Tsukuba U.)– Two master students in Tsukuba have been supported by “TYL-FJPPL Studentor Early Stage Researcher Secondment" ). Thank you!

✓ 2016:-Continue 2015 activities:-Data analysis (Run-2 jet and photon results) → physics outputs &publications (by FJPPL, AAF)

-Double degree program, EMCal/DCal and L1 trigger

Thank you for the continuos and strong support by TYL/FJPPL !
2016 Joint Workshop of FKPPL and TYL/FJPPL @ KIAS, May 18, T. Chujo (U. Tsukuba)

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