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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 Publication | COMMUNICATIONS IN THEORETICAL PHYSICS |
Keyword | Chiral-symmetry Restoration Dyson-schwinger Equations Decay Constant Compact Stars Self-energy Transition Breaking Physics Matter |
Abstract | 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. |
2009 | |
ISSN | 0253-6102 |
Volume | 51Issue:3Pages:499-505 |
Subject Area | Physics |
Indexed By | SCI |
Funding Organization | 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 ; National Natural Sciencce Foundation of China[10575050]; Research Fund for the Doctoral Program of Higher Education |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.itp.ac.cn/handle/311006/5369 |
Collection | SCI期刊论文 |
Corresponding Author | Hou, 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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