学术报告：Quarkonia production in relativistic heavy ion collisions
报告题目：Quarkonia production in relativistic heavy ion collisions
报告人：Che Ming Ko（Texas A&M University）
时 间：2014年1月6日（星期一）下午2：00-3：00
地 点：张江园区多功能厅
报告简介：
Since the suggestion by Matsui and Satz that the production of charmonium would be suppressed in relativistic heavy-ion collisions as a result of the screening of color charges in QGP and thus could be used as a signature for the produced QGP in these collisions, there have been extensive experimental and theoretical studies on this very interesting phenomenon. Although experiments from SPS, RHIC, and LHC have indeed shown a suppressed production of charmonium as well as the bottomonium, a satisfactory explanation involves the interplay of many effects from both the initial cold nuclear matter and the final hot partonic and hadronic matters. Including these effects in a two-component model that takes into account both initial production from nucleon-nucleon hard scattering and regeneration from produced QGP, we have carried out a series of studies of quarkonia production in relativistic heavy ion collisions [1-3]. A good description has been obtained for the nuclear modification factors of charmonia measured in heavy ion collisions at SPS, RHIC and LHC and of bottomonia measured at RHIC and LHC. An application of our model to p+Pb collisions at the LHC shows that the hot medium effects are also present for charmonium production in these collisions [4]. In this talk, I will review these results and also discuss the heavy quark non-equilibrium effect [5] and the initial- state fluctuations effect on quarkonia production [6], the formation time of quarkonia [7] and the heavy quark potential [8] in the quark-gluon plasma, and the validity of the dipole approximation used in calculating the chamronium dissociation cross section [9].
References
1) T. Song, C. M. Ko, S. H. Lee, and J. Xu, ``J/ψ production and elliptic flow in relativistic heavy ion Collisions”, Phys. Rev. C 83, 014914 (2011).
2) T. Song, K. Han, and C. M. Ko, ``Charmonium production in relativistic heavy-ion collisions", Phys. Rev. C 84, 034907 (2011).
3) T. Song, K. C. Han, and C. M. Ko, ``Bottomonia suppression in heavy ion collisions at RHIC and LHC", Phys. Rev. C 85, 014902 (2012).
4) Y. P. Liu, C. M. Ko, and T. Song, ``Hot Medium Effects on J/ψ Production in p+Pb Collisions at √s_NN=5.02 TeV", Phys. Lett. B 728, 437 (2013).
5) T. Song, K. C. Han, and C. M. Ko, ``Charmonium Production from Nonequilibrium Charm and Anticharm Quarks in Quark-Gluon Plasma", Phys. Rev. C, 85, 054905 (2012).
6) T. Song, K. C. Han, and C. M. Ko, ``The effect of initial fluctuations on bottomonia suppression in relativistic heavy ion collisions”, Nucl. Phys. A 897, 141 (2012).
7) T. Soong, C. M. Ko, and S. H. Lee, ``Quarkonia Formation Time in Quark-Gluon Plasma", Phys. Rev. C 87, 034910 (2013).
8) S. H. Lee, K. Morita, T. Song, and C. M. Ko, ``Free Energy Versus Internal Energy Potential for Heavy Quark Systems at Finite Temperature", arXiv:1304.4092 [nucl- th].
9) Y. P. Liu, C. M. Ko, and T. Song, ``Gluon dissociation of J/ψ Beyond the Dipole Approximation", Phys. Rev. C 88, 064902 (2013).
报告人简介：
EDUCATION:
B.Sc., Tunghai University, Taichung, Taiwan, 1965
M.Sc., McMaster University, Hamilton, Ontario, Canada, 1968 Ph.D., State University of New York, Stony Brook, New York, 1973
POSITIONS HELD:
1973-1974 Postdoctoral Research Fellow, McMaster University 1974-1977 Visiting Scientist, Max-Planck-Institute for Nuclear Physics 1977-1978 Research Associate, Michigan State University
1978-1980 Research Associate, Lawrence Berkeley Laboratory 1980-1984 Assistant Professor, Texas A&M University
1984-1985 Visiting Scientist, Oak Ridge National Laboratory
Visiting Associate Professor, University of Tennessee 1984-1988 Associate Professor, Texas A&M University 1988-present Professor, Texas A&M University 1996 Fall Visiting Professor, State University of New York at Stony Brook
Visiting Associate Professor, University of Tennessee 1984-1988 Associate Professor, Texas A&M University 1988-present Professor, Texas A&M University 1996 Fall Visiting Professor, State University of New York at Stony Brook
HONORS AND AWARDS:
1994 Fellow, American Physical Society
2004 Association of Texas A&M Former Students Distinguished Research Award 2010 Outstanding Referee, American Physical Society
2012 Excellence in Reviewing, Physics Letters B, Elsevier
PROFESSIONAL SERVICE:
1998-2000 Member, Editorial board, Physical Review C, American Institute of Physics 2009-present Associate Editor, Chinese Journal of Physics
RESEARCH INTERESTS: Theoretical nuclear and hadronic physics RESEARCH GRANTS: $4,669,356 since 1981 from National Science Foundation,
Department of Energy, Welch Foundation, and Texas Advanced Research Program
Department of Energy, Welch Foundation, and Texas Advanced Research Program
PUBLICATIONS: As of December 25, 2013, 316 publications with total citations of 11,357 and h index of 53 in ISI Web of Science.
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