Equation of State for Isospin Asymmetric Matter of Nucleons and Deltas

作     者：卢晓华 张英逊 李祝霞 赵志祥 

作者机构：China Institute of Atomic Energy Beijing 102413 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2008年第25卷第11期

页      面：3932-3935页

核心收录：

学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos 10675172 and 10235030  and the National Basic Research Programme of China under Grant No 2007CB209900 

主　　题：the power-law exponents precipitation durative abrupt precipitation change 

摘      要：An investigation on the equation of state of the isospin asymmetric, hot, dense matter of nucleons and deltas is performed based on the relativistic mean field theory. The QHD-Ⅱ-type effective Lagrangian extending to the delta degree of freedom is adopted. Our re,sults show that the equation of state is softened due to the inclusion of the delta degree of freedom. The baryon resonance isomer may occur depending on the delta-meson coupling. The results show that the densities for appearing the baryon resonance isomer, the densities for starting softening the equation of state and the extent of the softening depend not only on the temperature, the coupling strengths but also the isospin asymmetry of the baryon matter.