Experiment of constraining symmetry energy at supra-saturation density with π~-/π~+ at HIRFL-CSR

被引：3
|
作者：
张明 [1 ]
肖志刚 [1 ]
朱胜江 [1 ]
机构：
[1] Department of Physics,Tsinghua University
来源：
中国物理C | 2010年 / 08期
基金：
中国国家自然科学基金;
关键词：
nuclear symmetry energy; charged pion ratio; IBUU04 transport model; external target facility;
D O I：
暂无
中图分类号：
O572.211 [];
学科分类号：
摘要：
The possibility of the experiment for constraining the symmetry energy Esym(ρ) at supra-densities via π-/π+ probe on the external target experiment of phase I ( ETE(I) ) with part coverage at forward angle at HIRFL-CSR is studied for the first time by using the isospin and momentum dependent hadronic transport model IBUU04. Based on the transport simulation with Au+Au collisions at 400 MeV/u, it is found that the differential π-/π+ ratios are more sensitive to Esym(ρ) at forward angles in laboratory reference, compared with the total yield ratio widely proposed. The insufficient coverage at lower transverse momentum maintains the sensitivity of the dependence of π-/π+ ratio on the Esym(ρ) at high density, indicating that the ETF (I) under construction in Lanzhou provides the possibility of performing the experiment for probing the asymmetric nuclear equation of state.
引用
收藏
页码：1100 / 1103
页数：4
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