摘要
在优化后的极端相对论量子分子动力学模型(UrQMD模型)基础上加入两种不同强度的πN势,研究它们对π介子的直接流及粒子数的影响.通过理论计算结果与FOPI实验数据进行比较发现,考虑较弱的πN势可以很好地解释直接流随快度的变化情况,而考虑较强的πN势或不考虑πN势给出的结果均与实验数据有较大差异.
Within the newly updated version of the ultrarelativistic quantum molecular dynamics（UrQMD）model,the directed flow and the transverse velocity distribution of pions are studied by employing two different pion-nucleon potentials.By comparing the simulated results with the FOPI experimental data,it is found that the directed flow of pion can be reproduced well by calculations with a relatively weak pion-nucleon potential.
作者
刘洋阳
刘玲
李庆峰
王永佳
LIU Yangyang;LIU Ling;LI Qingfeng;WANG Yongjia(Physical Science and Technical CoIIege,Shenyang Normal University,Shenyang l1003d,China;School of Science,Huzhou University,Htlzhotl 313000,China;Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China)
出处
《湖州师范学院学报》
2018年第4期20-23,共4页
Journal of Huzhou University
基金
国家自然科学基金项目(11505057
11375062
11747312)
浙江省自然科学基金项目(LY18A050002)
关键词
重离子碰撞
UrQMD模型
πN势
直接流
heavy ion collisions
UrQMD model
pion nucleon potential
directed flow
