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A Model Study of Equation of State of QCD at Finite Chemical Potential and Zero Temperature
Hou Feng-Yao1,2; Jiang Yu1; Sun Wei-Min1,3; Zong Hong-Shi1,3
2009-03-01
发表期刊COMMUNICATIONS IN THEORETICAL PHYSICS
卷号51期号:3页码:499-505
摘要In this paper, we give a direct method for calculating the partition function, and hence the equation of state (EOS) of QCD at finite chemical potential and zero temperature. In the EOS derived in this paper the pressure density is the sum of two terms: the first term P(mu)vertical bar(mu=0) (the pressure density at mu = 0) is a mu-independent constant; the second term, which is totally determined by G[mu](p) (the dressed quark propagator at finite mu), contains all the nontrivial mu-dependence. By applying a general result in the rainbow-ladder approximation of the Dyson-Schwiner approach obtained in our previous study [Phys. Rev. C 71 (2005) 015205], G[mu](p) is calculated from the meromorphic quark propagator proposed in [Phys. Rev. D 67 (2003) 054019]. From this the full analytic expression of the EOS of QCD at finite mu and zero T is obtained (apart from the constant term P(mu)vertical bar(mu=0), which can be principle be calculated from the CJT effective action). A comparison between our EOS and the cold, perturbative EOS of QCD of Fraga, Pisarski and Schaffner-Bielich is made. It is expected that our EOS can provide a possible new approach for the study of neutron stars.
文章类型Article
关键词Equation Of State (Eos) Phase Transition Qcd
WOS标题词Science & Technology ; Physical Sciences
关键词[WOS]CHIRAL-SYMMETRY RESTORATION ; DYSON-SCHWINGER EQUATIONS ; DECAY CONSTANT ; COMPACT STARS ; SELF-ENERGY ; TRANSITION ; BREAKING ; PHYSICS ; MATTER
收录类别SCI
语种英语
WOS研究方向Physics
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000264755300022
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文献类型期刊论文
条目标识符http://libir.pmo.ac.cn/handle/332002/15932
专题暗物质和空间天文实验室
作者单位1.Nanjing Univ, Dept Phys, Nanjing 210093, Peoples R China
2.Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
3.Joint Ctr Particle Nucl Phys & Cosmol, Nanjing 210093, Peoples R China
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Hou Feng-Yao,Jiang Yu,Sun Wei-Min,et al. A Model Study of Equation of State of QCD at Finite Chemical Potential and Zero Temperature[J]. COMMUNICATIONS IN THEORETICAL PHYSICS,2009,51(3):499-505.
APA Hou Feng-Yao,Jiang Yu,Sun Wei-Min,&Zong Hong-Shi.(2009).A Model Study of Equation of State of QCD at Finite Chemical Potential and Zero Temperature.COMMUNICATIONS IN THEORETICAL PHYSICS,51(3),499-505.
MLA Hou Feng-Yao,et al."A Model Study of Equation of State of QCD at Finite Chemical Potential and Zero Temperature".COMMUNICATIONS IN THEORETICAL PHYSICS 51.3(2009):499-505.
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