Azimuthal anisotropies such as the elliptic flow v2 are important tools for studying the properties of the quark-gluon plasma. Studies with parton transport models have shown [1] that most parton v2 comes from the anisotropic parton escape, not from the hydrodynamic flow, even for semi-central Au+Au collisions at 200A GeV. Here we use a multi-phase transport (AMPT) model to investigate the flavor dependence of this parton escape mechanism, with the focus on charm quark v2 in heavy ion as well as small system collisions at RHIC and LHC energies. By performing the azimuth-randomized tests, we extract the relative contributions of the escape mechanism to the v2 of light, strange, and charm quarks. We find [2] that the common escape mechanism is at work for both the charm and light quark v2. However, contrary to the naive expectation, we find the charm v2 to be much more sensitive to the hydrodynamic flow than lighter quarks’ v2. This suggests that the charm v2 is a better probe for studying the hydrodynamic properties of the quark-gluon plasma.
[1] L. He et al., Phys. Lett. B 753, 506 (2016); Z.W. Lin, et al., Nucl. Phys. A 956, 316 (2016).
[2] Z.W. Lin, H. Li, and F. Wang, EPJ Web of Conferences 171, 19005 (2018); H. Li, Z.W. Lin, and F. Wang, arXiv:1804.02681.
报告人简介：
Education
Ph.D. Columbia University, New York, NY, USA, Physics, 1996
M.Phil. Columbia University, New York, NY, USA, 1994
M.S. Columbia University, New York, NY, USA, Physics, 1994
B.S. University of Science and Technology of China, Hefei, China, Theoretical Physics, 1991
Academic Employment
Guest Professor, Central China Normal University (June 2016 - Present), Wuhan, China.
Associate Professor, East Carolina University (August 2013 - Present), Greenville, NC.
Assistant Professor, East Carolina University (August 2007 - August 2013), Greenville, NC.
Research Scientist, University of Alabama in Huntsville / NASA Marshall Space Flight Center (December 2003 - August 2007), Huntsville, AL.
Postdoctoral Research Associate, The Ohio State University (October 2002 - November 2003), Columbus, OH.
Research Associate, Texas A & M University (October 1998 - September 2002), College Station, TX.
Postdoctoral Fellow, Lawrence Berkeley National Laboratory (October 1996 - September 1998), Berkeley, CA.
Selected Publication List (in the last five years)
Nagle, J.L., Belmont, R., Hill, K., Koop, J.O., Perepelitsa, D.V., Yin, P., Lin, Z.W., McGlinchey, D. (2017). Study of Minimal Conditions for Collectivity in e+e- and p+p Collisions. arXiv:1707.02307, Phys. Rev. C (in press)
He, Y., Lin, Z.W. (2017). Improved Quark Coalescence for a Multi-Phase Transport Model. Physical Review C, 96, 014910.
Li, H., He, L., Lin, Z.W., Molnar D., Wang F.Q., Xie W. (2017). Origin of the Mass Splitting of Azimuthal Anisotropies in a Multi-Phase Transport Model. Physical Review C, 96, 014901.
Li, H., Lin, Z.W., Wang, F.Q. (2017). The Physics Mechanisms of Light and Heavy Flavor v2 and Mass Ordering in AMPT. 16th International Conference on Strangeness in Quark Matter (SQM2016), 779 (1), 012063.
Lin, Z.W., He, L., Edmonds, T., Liu, F., Molnar, D., Wang, F.Q. (2016). Elliptic Anisotropy v2 May Be Dominated by Particle Escape instead of Hydrodynamic Flow. Nuclear Physics A 956, 316.
Jiang, Y., Lin, Z.W., Liao, J. (2016). Rotating Quark-Gluon Plasma in Relativistic Heavy Ion Collisions. Physical Review C, 94 (4), 044910.
Li, H., He, L., Lin, Z.W., Molnar, D., Wang, F.Q., Wei Xie (2016). Origin of the Mass Splitting of Elliptic Anisotropy in a Multiphase Transport Model. Physical Review C, 93, 051901.
Ma, G.L., Lin, Z.W. (2016). Predictions for sqrt s_NN=5.02 TeV Pb+Pb Collisions from a Multi- Phase Transport Model. Physical Review C, 93, 054911.
He, L., Edmonds, T., Lin, Z.W., Liu, F., Molnar, D., Wang, F.Q. (2016). Anisotropic Parton Escape is the Dominant Source of Azimuthal Anisotropy in Transport Models. Physics Letter B, 753, 506-510.
Albacete, J.L., et al. (2016). Predictions for p+Pb Collisions at sqrt s_NN = 5 TeV: Comparison with Data. International Journal of Modern Physics E, 25 (9), 1630005.
Singha, S., Mohanty, B., Lin, Z.W. (2015). Studying Re-scattering Effect In Heavy-ion Collision Through K* Production. International Journal of Modern Physics E, 24 (5), 1550041.
Lin, Z.W. (2014). Evolution of Transverse Flow and Effective Temperatures in the Parton Phase from a Multiphase Transport Model. Physical Review C, 90, 014904.
Ko, C.M., Chen, L.-W., Greco, V., Li, F., Lin, Z.W., Plumari, S., Song, T., Xu, J. (2014). Elliptic Flow Difference Between Particles and Antiparticles and the EOS of Baryon-rich
Matter. Acta Physica Polonica. Series B, 7, 183-190.
Lin, Z.W. (2014). Recent Developments of A Multi-Phase Transport Model. Acta Physica Polonica. Series B, 7, 191-197.
Ko, C.M., Chen, L., Greco, V., Li, F., Lin, Z.W., Plumari, S., Song, T., Xu, J. (2013). Mean-field Effects on Matter and Antimatter Elliptic Flow. Nuclear Science and Techniques, 24, 050525.
Albacete, J. L., et al. (2013). Predictions for p+Pb Collisions at sqrt s_NN = 5 TeV. International Journal of Modern Physics E, 22, 1330007.
Honors and Awards
2013-2014: Scholar-Teacher Award. East Carolina University Scholar-Teachers for 2013-2014
2010-2011: Thomson Reuters ScienceWatch？ has selected our article, 'Multiphase transport model for relativistic heavy ion collisions' (Lin et al., Physical Review C 72, 064901, 2005), as a featured Research Front Map paper. As corresponding author, I was asked for comments on questions regarding the paper, and my interview was published by Thomson Reuters ScienceWatch？ on June 2011's edition of "Special Topic of Hadron Colliders Interview" about our paper and its impact on the field of hadron colliders, see http://www.sciencewatch.com/ana/st/hadron/11junSThadLin/
2006-2007: NASA Marshall Space Flight Center. NASA Group Achievement Award
2002-2003: The Institute for Nuclear Theory, University of Washington. Wine prize, best overall transport model for RHIC predictions
1989-1990: University of Science and Technology of China. Zhang Zong-Zhi Prize for Outstanding Academic Achievement