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Mean-field effects on matter and antimatter elliptic flow

Nuclear Science and Techniques 2013年第5期24卷 132-139页

作者： ko cheming CHEN Liewen GRECO Vincenzo LI Feng LIN Ziwei PLUMARI Salvatore SONG Taesoo XU Jun Cyclotron Institute and Department of Physics and Astronomy Texas A & M UniversityCollege Station Department of Physics Shanghai Jiao Tong University Dipartimento di Fisica e Astronomia Universitá di CataniaVia S.Sofia 64 Department of Physics East Carolina UniversityC-209 Howell Science ComplexGreenville Shanghai Institute of Applied Physics Chinese Academy of Sciences

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 *** 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 *** 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

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