准粒子描述下奇异夸克物质自洽热力学及对奇异星物态的影响  

Consistent Thermodynamics of SQM and EOS of Strange Stars in Quasi-Particle Description

作　　者：杨书华[1] 郑小平[1] 

机构地区：[1]华中师范大学物理系,武汉430079

出　　处：《高能物理与核物理》2002年第11期1172-1177,共6页High Energy Physics and Nuclear Physics

基　　金：华中师范大学自然科学基金资助~~

摘　　要：考虑夸克粒子间相互作用 ,研究了在准粒子近似下奇异夸克物质系统的热力学 ,发现由于热力学自洽的要求 ,需要在热力学势中额外增加一项 .利用这一等效热力学讨论奇异夸克物质的物态方程及声速 ,得到了一个“软化”的物态 ,这与质量 -密度相关模型是一致的 .Taking the interactions between quarks into account, we study thermodynamics of strange quark matter system in the quasi particle approximation with the result that an extra term should be added to the thermodynamic potential density considering the self consistent condition. The equation of states turns out to be 'softened' when applying the above thermodynamics to strange quark matter in strange stars, and this is consistent with the results of the mass chemical potential dependent model. However, the quasi particle description model indicates the dependence of medium effects on the coupling constant of strong interaction.

关 键 词：自洽热力学 准粒子描述 奇异夸克物质 物态方程 奇异星 

分 类 号：O572.33[理学—粒子物理与原子核物理] O145.6[理学—物理]