Hydrodynamic simulations of directed flow for light hadrons in Au+Au and isobarcollisions at √SNN=200 GeV  

作　　者：靖晶 江泽方 杨纯斌 张本威 Jing Jing;Ze-Fang Jiang;C.B.Yang;Ben-Wei Zhang(Department of Physics and Electronic-Information Engineering,Hubei Engineering University,Xiaogan 43200,China;Institute of Particle Physics and Key Laboratory of Quark and Lepton Physics(MOE),Central China Normal University,Wuhan430079,China)

机构地区：[1]Department of Physics and Electronic-Information Engineering,Hubei Engineering University,Xiaogan 43200,China [2]Institute of Particle Physics and Key Laboratory of Quark and Lepton Physics(MOE),Central China Normal University,Wuhan430079,China

出　　处：《Chinese Physics C》2023年第3期169-179,共11页中国物理C（英文版）

基　　金：Supported by the National Natural Science Foundation of China(NSFC)(11935007);Guangdong Major Project of Basic and Applied Basic Research(2020B0301030008);the Natural Science Foundation of Hubei Province(2021CFB272),the Education Department of Hubei Province of China with Young Talents Project(Q20212703);the Open Foundation of Key Laboratory of Quark and Lepton Physics(MOE)(QLPL202104);the Xiaogan Natural Science Foundation(XGKJ2021010016)。

摘　　要：Using a(3+1)-D hydrodynamic model,CLVisc,we study the directed flow(vi)of light hadrons pro-duced in Au+Au,Ru+Ru,and Zr+Zr collisions at √SNN=200 GeV.The evolution of tilted energy density,pres-sure gradient,and radial flow along the x-direction is systematically investigated.The counter-clockwise tilt of the initial fireball is shown to be a vital source of directed flow for final light hadrons.A good description of directed flow is provided for light hadrons in central and mid-central Au+Au and isobar collisions at the RHIC.Our numeric-al results show a clear system size dependence for light hadron Vi across different collision systems.We further study the effect of nuclear structure on the directed flow and find that v1 for light hadrons is insensitive to nuclei with quadrupole deformation.

关 键 词：heavy ion collisions quark-gluon plasma directed flow isobar Ru and Zr 

分 类 号：O572.214[理学—粒子物理与原子核物理]