Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2013, Vol. 24 ›› Issue (5): 050525 doi: 10.13538/j.1001-8042/nst.2013.05.025

Special Issue: Special Section on International Workshop on Nuclear Dynamics in Heavy-Ion Reaction (IWND2012)

• Special Section on International Workshop on Nuclear Dynamics in Heavy-Ion Reaction (IWND2012) • Previous Articles    

Mean-field effects on matter and antimatter elliptic flow  

KO Cheming1,*  CHEN Liewen2  GRECO Vincenzo3  LI Feng1  LIN Ziwei4  PLUMARI Salvatore3  SONG Taesoo1  XU Jun5     

  1. 1Cyclotron Institute and Department of Physics and Astronomy, Texas A&M University, College Station, TX 77843, USA

    2Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, China

    3Dipartimento di Fisica e Astronomia, Universitá di Catania, Via S. Sofia 64, 95125 Catania, Italy

    4Department of Physics, East Carolina University, C-209 Howell Science Complex, Greenville, NC 27858, USA

    5Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China  

  • Received:2013-06-27
  • Contact: KO Cheming
  • Supported by:

    Supported by the U.S. National Science Foundation (GrantNo.PHY-106857), the Welch Foundation (Grant No.A-1358), the NNSF of China (GrantNos.11135011 and 11275125), ShanghaiRising-Star Program (Grant No.11QH1401100), "Shu Guang" project and “EasternScholar” program of Shanghai, and the ERC-StG (Grant QGPDyn No.259684)


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KO Cheming, CHEN Liewen, GRECO Vincenzo, LI Feng, LIN Ziwei, PLUMARI Salvatore, SONG Taesoo, XU Jun. Mean-field effects on matter and antimatter elliptic flow  .Nuclear Science and Techniques, 2013, 24(5): 050525     doi: 10.13538/j.1001-8042/nst.2013.05.025


We report our recent work on mean-field potential effects on the elliptic flows of matters and antimatters in heavy ion collisions leading to the production of a baryon-rich matter. Within the framework of a multiphase transport (AMPT) model that includes both initial partonic and final hadronic interactions, we have found that including mean-field potentials in the hadronic phase leads to a splitting of the elliptic flows of particles and their antiparticles, providing thus a plausible explanation of the different elliptic flows between p and anti-p, K+ and K, and π+ and πobserved by the STAR Collaboration in the Beam Energy Scan (BES) program at the Relativistic Heavy Ion Collider (RHIC). Using a partonic transport model based on the Nambu-Jona-Lasinio (NJL) model, we have also studied the effect of scalar and vector mean fields on the elliptic flows of quarks and antiquarks in these collisions. Converting quarks and antiquarks at hadronization to hadrons via the quark coalescence model, we have found that the elliptic flow differences between particles and antiparticles also depend on the strength of the quark vector coupling in baryon-rich quark-gluon plasma, providing thus the possibility of extracting information on the latter’s properties from the BES program at RHIC.

Key words: Relativistic heavy ion collisions, Hadronicand partonic mean fields, Elliptic flows