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题名: A Model Study of Equation of State of QCD at Finite Chemical Potential and Zero Temperature
作者: Hou Feng-Yao1, 2; Jiang Yu1; Sun Wei-Min1, 3; Zong Hong-Shi1, 3
刊名: COMMUNICATIONS IN THEORETICAL PHYSICS
出版日期: 2009-03-01
卷号: 51, 期号:3, 页码:499-505
关键词: equation of state (EOS) ; phase transition ; QCD
文章类型: Article
英文摘要: 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.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Physics, Multidisciplinary
研究领域[WOS]: Physics
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记录号: WOS:000264755300022
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/15932
Appears in Collections:暗物质和空间天文实验室_期刊论文

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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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