Hyperon Dynamics in Heavy-Ion Collisions near Threshold Energy  

作　　者：Ding-Chang Zhang Hui-Gan Cheng Zhao-Qing Feng 张定昌;程辉淦;冯兆庆(School of Physics and Optoelectronic Technology,South China University of Technology,Guangzhou 510641,China)

机构地区：[1]School of Physics and Optoelectronic Technology,South China University of Technology,Guangzhou 510641,China

出　　处：《Chinese Physics Letters》2021年第9期33-37,共5页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China(Grant Nos.12175072 and 11722546);the Talent Program of South China University of Technology.

摘　　要：Within the framework of quantum molecular dynamics transport model,the isospin and in-medium effects on the hyperon production in the reaction of ^(197)Au+^(197) Au are investigated thoroughly.A repulsive hyperon-nucleon potential from the chiral effective field theory is implemented into the model,which is related to the hyperon momentum and baryon density.The correction on threshold energy of the elementary hyperon cross section is taken into account.It is found that the𝛴yields are suppressed in the domain of midrapidity and kinetic energy spectra with the potential.The hyperons are emitted in the reaction plane because of the strangeness exchange reaction and reabsorption process in the nuclear medium.The∑^(−)/𝛴∑^(+)ratio depends on the stiffness of nuclear symmetry energy,in particular in the high-energy region(above 500 MeV).

关 键 词：POTENTIAL DENSITY ELEMENTARY 

分 类 号：O571.6[理学—粒子物理与原子核物理]