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Hou Feng-Yao; Jiang Yu; Sun Wei-Min; Zong Hong-Shi; Hou, FY , Nanjing Univ, Dept Phys, Nanjing 210093, Peoples R China
A Model Study of Equation of State of QCD at Finite Chemical Potential and Zero Temperature
Source PublicationCOMMUNICATIONS IN THEORETICAL PHYSICS
KeywordChiral-symmetry Restoration Dyson-schwinger Equations Decay Constant Compact Stars Self-energy Transition Breaking Physics Matter
AbstractIn 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.
2009
ISSN0253-6102
Volume51Issue:3Pages:499-505
Subject AreaPhysics
Indexed BySCI
Funding OrganizationNational Natural Sciencce Foundation of China[10575050]; Research Fund for the Doctoral Program of Higher Education ; National Natural Sciencce Foundation of China[10575050]; Research Fund for the Doctoral Program of Higher Education ; National Natural Sciencce Foundation of China[10575050]; Research Fund for the Doctoral Program of Higher Education ; National Natural Sciencce Foundation of China[10575050]; Research Fund for the Doctoral Program of Higher Education
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/5369
Collection理论物理所科研产出_SCI期刊论文
Corresponding AuthorHou, FY , Nanjing Univ, Dept Phys, Nanjing 210093, Peoples R China
Recommended Citation
GB/T 7714
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,&Hou, FY , Nanjing Univ, Dept Phys, Nanjing 210093, Peoples R China.(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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