πN势对重离子碰撞中π介子集体流的影响
发布时间：2019-01-26 11:46
【摘要】：中能重离子碰撞中产生的π介子是研究高密核物质状态方程一个重要的探针.而影响π介子在核介质中输运的π介子与核子相互作用势(πN势)目前还没有完全确定.在最近更新的极端相对论量子分子动力学(UrQMD)模型中加入一种经验的πN势,研究了它对π+和π-介子集体流的影响.通过与FOPI合作组实验数据的比较发现,考虑一个较弱的πN势可以同时半定量地解释直接流和椭圆流随快度及横向速度的变化情况,而考虑强的πN势或者不考虑πN势给出的结果都与实验数据有很大差异.
[Abstract]:The 蟺 meson produced in heavy ion collisions is an important probe for studying the equation of state of high density nuclear matter. However, the interaction potential between 蟺 meson and nucleon (蟺 N potential), which affects the transport of 蟺 mesons in nuclear media, has not been completely determined. An empirical 蟺 N potential is added to the recently updated (UrQMD) model of extreme relativistic quantum molecular dynamics, and its effect on 蟺 and 蟺 -meson collective flow is studied. By comparing with the experimental data of FOPI cooperative group, it is found that considering a weaker 蟺 N potential, the variation of direct flow and elliptical flow with speed and transverse velocity can be explained semi-quantitatively simultaneously. The results obtained by considering the strong 蟺 N potential or not considering the 蟺 N potential are very different from the experimental data.
【作者单位】： 沈阳师范大学物理科学与技术学院;湖州师范学院理学院;中国科学院上海应用物理研究所;中国科学院近代物理研究所;
【基金】：国家自然科学基金(编号:11375062,11505057,11647306,11605270) 浙江省教育厅一般科研项目(编号:Y201533176) 中国博士后科学基金(编号:2016M591730)资助
【分类号】：O571.6
[Abstract]:The 蟺 meson produced in heavy ion collisions is an important probe for studying the equation of state of high density nuclear matter. However, the interaction potential between 蟺 meson and nucleon (蟺 N potential), which affects the transport of 蟺 mesons in nuclear media, has not been completely determined. An empirical 蟺 N potential is added to the recently updated (UrQMD) model of extreme relativistic quantum molecular dynamics, and its effect on 蟺 and 蟺 -meson collective flow is studied. By comparing with the experimental data of FOPI cooperative group, it is found that considering a weaker 蟺 N potential, the variation of direct flow and elliptical flow with speed and transverse velocity can be explained semi-quantitatively simultaneously. The results obtained by considering the strong 蟺 N potential or not considering the 蟺 N potential are very different from the experimental data.
【作者单位】： 沈阳师范大学物理科学与技术学院;湖州师范学院理学院;中国科学院上海应用物理研究所;中国科学院近代物理研究所;
【基金】：国家自然科学基金(编号:11375062,11505057,11647306,11605270) 浙江省教育厅一般科研项目(编号:Y201533176) 中国博士后科学基金(编号:2016M591730)资助
【分类号】：O571.6
【相似文献】
相关期刊论文 前10条
1 李磊,张小兵,谭玉红,宁平治;核物理中的π介子[J];原子核物理评论;2003年01期
2 郭x┖，
本文编号：2415446
本文链接：https://www.wllwen.com/kejilunwen/wulilw/2415446.html
