Study of the properties of hot and dense Quark-Gluon-Plasma via Quarkonia production

• Project/Area Number: 20740126
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: The University of Tokyo
• Principal Investigator: GUNJI Taku The University of Tokyo, 大学院・理学系研究科・原子核科学研究センター, 助教 (10451832)
• Project Period (FY): 2008 – 2009
• Project Status: Completed (Fiscal Year 2009)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2009: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000); Fiscal Year 2008: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
• Keywords: 原子核(実験) / LHC-ALICE実験 / 高エネルギー重イオン衝突 / クォークグルオンプラズマ / 遷移輻射検出器 / カラーグラス凝縮

Research Abstract

I participated in the ALICE experiment at CERN-LHC and performed the construction of the Transition Radiation Detector (TRD) and development of the readout electronics and its control system. I installed TRD in the experimental area and did commissioning at CERN. I successfully identified electrons with TRD and measured J/ψ via di-electron decay in the first p+p collisions at LHC.

Research Products

• [Journal Article] First proton+proton collisions at the LHC as observed with the ALICE detector-Measurement of the charged-particle pseudorapidity density at√s = 900 GeV (2010)
  • Author(s): K. Aamodt, T. Gunji,, et, al.
  • Journal Title: Eurp. Phys. Jornal C65 Pages: 111-125
  • Peer Reviewed
• [Journal Article] Detailed measurement of the e+e- pair continuum in p+p and Au+Au collisions at√sNN = 200 GeV and implications for the direct photon production (2010)
  • Author(s): A. Adare, T. Gunji, et, al.
  • Journal Title: hys. Rev. C81,034911
  • Peer Reviewed
• [Journal Article] First proton+proton collisions at the LHC as observed with the ALICE detector-Measurement of the charged-particle pseudorapidity density at sqrt s=900 GeV (2010)
  • Author(s): K.Adamodt, T.Gunji, et al.(ALICE Collaboration)
  • Journal Title: European Physics Journal C 65 Pages: 111-125
  • Peer Reviewed
• [Journal Article] Detailed measurement of the e+e- pair continuum in p+p and Au+Au collisions at s(NN)**(1/2)=200 GeV and implications for the direct photon production (2010)
  • Author(s): A.Adare, T.Gunji, et al.(PHENIX Collaboration)
  • Journal Title: Physical Review C 81 Pages: 34911-34911
  • Peer Reviewed
• [Journal Article] Enhanced production of direct photons in Au+Au collisions at sqrt(s_NN)=200GPV and implication for initial temperature (2010)
  • Author(s): A.Adare, T.Gunji, et al.(PHENIX Collaboration)
  • Journal Title: Physical Review Letter 104 Pages: 132301-132301
  • Peer Reviewed
• [Journal Article] Detailed measurement of the e+e- pair continuum in p+p and Au+Au coll isions at s(NN)**(1/2)=200 GeV and implications for the direct photon production (2010)
  • Author(s): A.Adare, T.Gunji, et al.(PHENIX Collaboration)
  • Journal Title: Physical Review C 81 Pages: 34911-34911
  • Peer Reviewed
• [Journal Article] Quarkonia Production in high-energy heavy-ion collisions at RHIC (2009)
  • Author(s): T. Gunji
  • Journal Title: Journal of Physics G36,064015
• [Journal Article] Photoproduction of J/ψand of high mass e+e- in ultra-relativistic Au+Au collisions at√sNN =200GeV (2009)
  • Author(s): S. Afanasive, T. Gunji, et, al.
  • Journal Title: Phys. Lett. B679 Pages: 321-329
  • Peer Reviewed
• [Journal Article] Measurement of Bottom versus Charm as a function of Transverse Momentum with Electron-Hadron Correlations in p+p collisions at√s=200GeV (2009)
  • Author(s): A. Adare, T. Gunji, et, al.
  • Journal Title: Phys. Rev. Lett. 103,082002
  • Peer Reviewed
• [Journal Article] Quarkonia Production in high-energy heavy-ion collisions at RHIC (2009)
  • Author(s): T.Gunji
  • Journal Title: Journal of Physics G 36 Pages: 64015-64015
• [Journal Article] Systematic Studies of Elliptic Flow Measurements in Au+Au collisions at s(NN)**(1/2)=200 GeV (2009)
  • Author(s): S.Afanasiev, T.Gunji, et al.(PHENIX Collaboration)
  • Journal Title: Physical Review C 80 Pages: 24909-24909
  • Peer Reviewed
• [Journal Article] High-pT pi0 production with respect to the reaction plane in Au+Au collisions at s(NN)**(1/2)=200 GeV (2009)
  • Author(s): S.Afanasiev, T.Gunji, et al.(PHENIX Collaboration)
  • Journal Title: Physical Review C 80 Pages: 54907-54907
  • Peer Reviewed
• [Journal Article] Photoproduction of J/Ψ and of high mass e+e- in ultra-relativistic Au+Au collisions at s(NN)**(1/2)=200GeV (2009)
  • Author(s): S.Afanasiev, T.Gunji, et al.(PHENIX Collaboration)
  • Journal Title: Physical Letters B 679 Pages: 321-329
  • Peer Reviewed
• [Journal Article] Measurement of Bottom versus Charm as a function of Transverse Momentum with Electron-Hadron Correlations in p+p collisions at sqrt(s)=200 GeV (2009)
  • Author(s): A.Adare, T.Gunji, et al.(PHENIX Collaboration)
  • Journal Title: Physical Review Letter 103 Pages: 82002-82002
  • Peer Reviewed
• [Journal Article] Dilepton mass spectra in p+p collisions at s**(1/2)=200 GeV and the contribution from open charm (2009)
  • Author(s): A.Adare, T.Gunji, et al.(PHENIX Collaboration)
  • Journal Title: Physical Letter B 670 Pages: 313-320
  • Peer Reviewed
• [Journal Article] J/ψProduction in√sNN = 200 GeV Cu+Cu Collisions (2008)
  • Author(s): A. Adare, T. Gunji, et, al.
  • Journal Title: Phys. Rev. Lett. 101,122301
  • Peer Reviewed
• [Journal Article] Cold Nuclear Matter Effects on J/ψProduction as Constrainted by Deuteron-Gold Measurements at√sNN = 200 GeV (2008)
  • Author(s): A. Adare, T. Gunji, et, al.
  • Journal Title: Phys. Rev. C77,024912
  • Peer Reviewed
• [Journal Article] The ALICE experiment at the CERN LHC (2008)
  • Author(s): K. Aamodt, T. Gunji, et, al.
  • Journal Title: Journal of Instrumentation 3,S08002
  • Peer Reviewed
• [Journal Article] Charged hadron multiplicity fluctuation in Au+Au and Cu+Cu collisions from s(NN)**(1/2)=22.5 to 200 GeV (2008)
  • Author(s): A.Adare, T.Gunji, et al.(PHENIX Collaboration)
  • Journal Title: Physical Review C 78 Pages: 44902-44902
  • Peer Reviewed
• [Journal Article] J/ψ Production in √sNN=200GeV Cu+Cu collisions (2008)
  • Author(s): A. Adare, T. Gunji, et.al.
  • Journal Title: Phys. Rev. Lett(For the PHENIX collab) 101 Pages: 122301-122301
  • Peer Reviewed
• [Journal Article] The ALICE Experiment at the CERN LHC (2008)
  • Author(s): K. Aamodt, T. Gunji, et.al.
  • Journal Title: Journal of Instrumentation(For the ALICE Collaboration) 3
  • Peer Reviewed
• [Journal Article] Charged hadron multiplicity fluctuation in Au+Au and Cu+Cu collisions from √SNN=22.5 to 200 GeV (2008)
  • Author(s): A. Adare, T. Gunji, et.al.
  • Journal Title: Phys. Rev. C(For the PHENIX collab) 78 Pages: 44902-44902
  • Peer Reviewed
• [Journal Article] Quantitative Constraints on the Opacity of Hot Partonic Matter from Semi?Inclusive Single High Transverse Momentum Pion Suppression in Au+Au Collisions at s(NN)**1/2 = 200 GeV (2008)
  • Author(s): A. Adare, T. Gunji, et.al.
  • Journal Title: Phys. Rev. C(For the PHENIX collab.) 77 Pages: 46907-46907
  • Peer Reviewed
• [Journal Article] Suppression pattern of neutral pions at high transverse momentum in Au+Au collisions at s(NN)**(1/2)=200 GeV and const raints on medium transport coefficients (2008)
  • Author(s): A. Adare, T. Gunji et.al.
  • Journal Title: Phys. Rev. Lett(For the PHENIX collab) 101 Pages: 232301-232301
  • Peer Reviewed
• [Journal Article] Dihadron azimuthal correlation in Au+Au collisions at s(NN)**(1/2)=200 GeV (2008)
  • Author(s): A. Adare, T. Gunji et.al.
  • Journal Title: Phys. Rev. C(For the PHENIX collab) 78 Pages: 14901-14901
  • Peer Reviewed
• [Journal Article] Onset of pi0 suppression studied in Cu+Cu Collisions at sNN=22.4, 62.4 and 200 GeV (2008)
  • Author(s): A. Adare, T. Gunji et.al.
  • Journal Title: Phys. Rev. Lett(For the PHENIX collab) 101 Pages: 162301-162301
  • Peer Reviewed
• [Presentation] Practices on GRID/CAF (2010)
  • Author(s): T.Gunji
  • Organizer: ALICE Analysis workshop for Asian countries
  • Place of Presentation: 広島大学
  • Year and Date: 2010-01-21
• [Presentation] J/psi Production in High Energy heavy Ion Collisions at RHIC (2010)
  • Author(s): T. Gunji
  • Organizer: 第65回日本物理学会年次大会
  • Place of Presentation: 岡山大学
• [Presentation] Practices on GRID/CAF (2010)
  • Author(s): T. Gunji
  • Organizer: ALICE Analysis workshop for Asian Countries
  • Place of Presentation: 広島大学
• [Presentation] Forward Physics at LHC energies (2009)
  • Author(s): T.Gunji
  • Organizer: Workshop on ALICE upgrade by Asian countries
  • Place of Presentation: Yonsei Univ., Korea
  • Year and Date: 2009-11-05
• [Presentation] Quarkonia Melting in Expanding hot and dense medium at RHIC (2009)
  • Author(s): T. Gunji
  • Organizer: Mini-symposium heavy ion collisions at JSP/DNP meeting
  • Place of Presentation: Hawaii
  • Year and Date: 2009-10-17
• [Presentation] Quarkonia Melting in Expanding hot and dense medium at RHIC (2009)
  • Author(s): T.Gunji
  • Organizer: 3^<rd> Joint DNP/JPS Meeting
  • Place of Presentation: Hawaii, USA
  • Year and Date: 2009-10-17
• [Presentation] Heavy Quarkonia Production in High Energy Heavy Ion Collisions at RHIC and Perspectives for LHC (2009)
  • Author(s): T. Gunji
  • Organizer: Workshop on Expanding Future of High Energy Nuclear Physics at LHC and RHIC
  • Place of Presentation: Hawaii
  • Year and Date: 2009-10-13
• [Presentation] Heavy Quarkonia Production in High Energy Heavy Ion Collisions at RHIC and Perspectives for LHC (2009)
  • Author(s): T.Gunji
  • Organizer: Workshop on Expanding Future of High Energy Nuclear Physics at LHC and RHIC
  • Place of Presentation: Hawaii, USA
  • Year and Date: 2009-10-13
• [Presentation] Heavy Quarks and Quarkonia Production at RHIC as a probe of hot and dense QCD medium (2009)
  • Author(s): T.Gunji
  • Organizer: 34^<th> International Symposium on Multiparticle Dynamics
  • Place of Presentation: Gomel, Belarus
  • Year and Date: 2009-09-05
• [Presentation] Quarkonia Melting in expanding hot and dense medium at RHIC C (2009)
  • Author(s): T.Gunji
  • Organizer: Workshop on Heavy Quarkonium Production in Heavy Ion Collisions
  • Place of Presentation: Trento, Italy
  • Year and Date: 2009-05-29
• [Presentation] Forward Physics at LHC energy (2009)
  • Author(s): T. Gunji
  • Organizer: Workshop for ALICE upgrade by Asian Countries
  • Place of Presentation: Yonsei University, Soul, Korea
• [Presentation] Heavy Quarks and Quarkonia Production at RHIC as a probe of hot and dense QCD medium (2009)
  • Author(s): T. Gunji
  • Organizer: 34th International Symposium on Multiparticle Dynamics
  • Place of Presentation: Gomel, Belarus
• [Presentation] Quarkonia Melting in expanding hot and dense medium at RHIC (2009)
  • Author(s): T. Gunji
  • Organizer: Workshop on Heavy Quarkonium Production in Heavy Ion Collisions
  • Place of Presentation: Trent, Italy
• [Presentation] Probing hot and dense medium via heavy quarks and quarkonia (2009)
  • Author(s): T. Gunji
  • Organizer: Workshop on Photons and leptons in Hot/Dense QCD
  • Place of Presentation: 名古屋大学
• [Presentation] Heavy Quark and Quarkonia Production at RHIC (2008)
  • Author(s): T. Gunji
  • Organizer: Asia Triangle Heavy Ion Conference 2008
  • Place of Presentation: つくば、日本
  • Year and Date: 2008-10-13
• [Presentation] Heavy Quarkonia Production in High Energy Heavy Ion Collisions (2008)
  • Author(s): T. Gunji
  • Organizer: Strangeness in Quark Matter 2009
  • Place of Presentation: 北京、中国
  • Year and Date: 2008-10-07
• [Presentation] ALICE performance for the Measurement of Heavy Quarkonia via di-electron decays (2008)
  • Author(s): T. Gunji
  • Organizer: 日本物理学会
  • Place of Presentation: 山形大学
  • Year and Date: 2008-09-21
• [Presentation] ALICE Performance for the Measurement of Heavy Quarkonia via dielectr on decays (2008)
  • Author(s): T. Gunii for the ALICE Coll aboration
  • Organizer: 日本物理学会
  • Place of Presentation: 山形大学、日本
  • Year and Date: 2008-09-21
• [Presentation] Heavy Quark and Quarkonia Measurement at RHIC (2008)
  • Author(s): T. Gunji
  • Organizer: Workshop on Photons and Jets with ALICE
  • Place of Presentation: CCNU, Wuhan, China
• [Presentation] Heavy Quark and Quarkonia Production at RHIC (2008)
  • Author(s): T. Gunji
  • Organizer: The 2nd Asian Triangle Heavy Ion Conference (ATHIC07)
  • Place of Presentation: Tsukuba, Japan
• [Presentation] Quarkonia Production in High Energy Heavy Ion Collisions at RHIC (2008)
  • Author(s): T. Gunji
  • Organizer: International Conference on Strangeness in Quark Matter (SQM08)
  • Place of Presentation: Beijing, China
• [Remarks]
  • URL: http://phenix.cns.s.u-tokyo.ac.jp
• [Remarks]
  • URL: http://phenix.cns.s.u-tokyo.ac.jp/~gunji