A model study of the equation of state,quark-number susceptibility and scalar susceptibility of QCD at finite chemical potential and zero temperature  

作　　者：ZHU HuiXia WANG HaiJiang PAN DanFeng ZONG HongShi 

机构地区：[1]Department of Physics,Nanjing University,Nanjing 210093,China [2]The College of Physics and Electronic Information,Anhui Normal University,Wuhu 241000,China [3]Joint Center for Particle,Nuclear Physics and Cosmology,Nanjing 210093,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2012年第12期2425-2433,共9页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.10775069,10935001 and 11075075);the Research Fund for the Doctoral Program of Higher Education(Grant No.200802840009);the Priority Academic Program Development of Jiangsu Higher Education Institution

摘　　要：In this article,we try to calculate the equation of state(EOS) of quantum chromodynamics(QCD) at finite chemical potential and zero temperature in the framework of a nonperturbative QCD model.Compared with the cold,perturbative EOS of QCD proposed by Fraga et al.,our EOS approaches more fastly to the free quark gas result at large chemical potential.It is expected that our EOS can provide a possible new tool for the study of neutron star.We also try to provide a direct approach for calculating quark number susceptibility and scalar susceptibility at finite chemical potential and zero temperature.In this article,we try to calculate the equation of state（EOS） of quantum chromodynamics（QCD） at finite chemical potential and zero temperature in the framework of a nonperturbative QCD model.Compared with the cold,perturbative EOS of QCD proposed by Fraga et al.,our EOS approaches more fastly to the free quark gas result at large chemical potential.It is expected that our EOS can provide a possible new tool for the study of neutron star.We also try to provide a direct approach for calculating quark number susceptibility and scalar susceptibility at finite chemical potential and zero temperature.

关 键 词：the equation of state quark number density quark-number susceptibility scalar susceptibility phase transition 

分 类 号：O572.243[理学—粒子物理与原子核物理] TG333.71[理学—物理]