一级微扰QCD耦合的夸克物质体粘滞系数  

Bulk Viscosity of Strange Quark Matter at First-Order Perturbative QCD Approximation

作　　者：俞云伟[1] 郑小平[1] 

机构地区：[1]华中师范大学物理科学与技术学院,武汉430079

出　　处：《高能物理与核物理》2004年第3期258-261,共4页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金 ( 10 3 73 0 0 7)资助~~

摘　　要：在高密情况下考虑了夸克间弱的耦合 ,直接应用微扰计算得到的热力学势计算了奇异夸克物质 (SQM)的体粘滞系数 ,发现介质效应使SQM的粘滞性提高Taking the thermodynamics potential for cold dense QCD in perturbation theory to the first order in coupling constant account, we calculate the bulk viscosity of strange quark matter(SQM), and find that the result is approximately 10 2 times than that of the ideal quark gas. In comparison with quasi-particle description model, we have the same result in order of magnitude. It is useful to improve the theory prediction that to apply the result to the calculation of the rotation speed limit, which is favorable for the explanation of the observation.

关 键 词：微扰QCD耦合 奇异夸克物质 体粘滞系数 奇异星 介质效应 热力学势 Fermi动量 量子色动力学 

分 类 号：O572.3[理学—粒子物理与原子核物理]