Quark-Number Susceptibility at Finite Chemical Potential and Zero Temperature  

作　　者：何登科 蒋宇 冯红涛 孙为民 宗红石 

机构地区：[1]Department of Physics, Nanjing University, Nanjing 210093 [2]joint Center for Particle, Nuclear Physics and Cosmology, Nanjing 210093

出　　处：《Chinese Physics Letters》2008年第2期440-443,共4页中国物理快报（英文版）

基　　金：Supported in part by the National Natural Science Foundation of China under Grant No 10575050, and the Research Fund for the Doctoral Programme of Higher Education in China under Grant No 20060284020.

摘　　要：We give a direct method for calculating the quark-number susceptibility at finite chemical potential and zero temperature. In this approach the quark-number susceptibility is totally determined by G[μ]（p） （the dressed quark propagator at finite chemical potential μ）. By applying the general result in our previous study [Phys. Rev. C 71 （2005） 015205, 034901, 73 （2006） 016004 ] G[μ]（p） is calculated from the model quark propagator proposed by Pagels and Stokar [Phys. Rev. D 20 （1979） 2947]. The full analytic expression of the quark-number susceptibility at finite μ and zero T is obtained.We give a direct method for calculating the quark-number susceptibility at finite chemical potential and zero temperature. In this approach the quark-number susceptibility is totally determined by G[μ]（p） （the dressed quark propagator at finite chemical potential μ）. By applying the general result in our previous study [Phys. Rev. C 71 （2005） 015205, 034901, 73 （2006） 016004 ] G[μ]（p） is calculated from the model quark propagator proposed by Pagels and Stokar [Phys. Rev. D 20 （1979） 2947]. The full analytic expression of the quark-number susceptibility at finite μ and zero T is obtained.

关 键 词：DYSON-SCHWINGER EQUATIONS QUANTUM CHROMODYNAMICS DECAY CONSTANT SELF-ENERGY QCD FLUCTUATION TRANSITION PHYSICS MODEL 

分 类 号：O572.3[理学—粒子物理与原子核物理]