Mean-field effects on matter and antimatter elliptic flow  

作　　者：KO Cheming CHEN Liewen GRECO Vincenzo LI Feng LIN Ziwei PLUMARI Salvatore SONG Taesoo XU Jun 

机构地区：[1]Cyclotron Institute and Department of Physics and Astronomy,Texas A & M University,College Station [2]Department of Physics,Shanghai Jiao Tong University [3]Dipartimento di Fisica e Astronomia,Universitá di Catania,Via S.Sofia 64 [4]Department of Physics,East Carolina University,C-209 Howell Science Complex,Greenville [5]Shanghai Institute of Applied Physics,Chinese Academy of Sciences

出　　处：《Nuclear Science and Techniques》2013年第5期132-139,共8页核技术（英文）

基　　金：Supported by the U.S.National Science Foundation(Grant No.PHY-106857);the Welch Foundation(Grant No.A-1358);the NNSF of China(Grant Nos.11135011 and 11275125);Shanghai Rising-Star Program(Grant No.11QH1401100);"Shu Guang" project;"Eastern Scholar" program of Shanghai;the ERC-StG(Grant QGPDyn No.259684)

摘　　要：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 π- observed 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.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 betweenp and anti-p, K＋ and K-, and Jr＋ and ~ observed 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.

关 键 词：椭圆流 平均场 反物质 强子相互作用 重离子碰撞 重离子对撞机 输运模型 RHIC 

分 类 号：O571.6[理学—粒子物理与原子核物理]