A Model Study of Equation of State of QCD at Finite Chemical Potential and Zero Temperature

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	A Model Study of Equation of State of QCD at Finite Chemical Potential and Zero Temperature
	Hou Feng-Yao 1,2; Jiang Yu 1; Sun Wei-Min 1,3; Zong Hong-Shi 1,3
刊名	COMMUNICATIONS IN THEORETICAL PHYSICS
	2009-03-01
卷号	51 期号:3 页码:499-505
关键词	equation of state (EOS) phase transition QCD
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
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/15932]
专题	紫金山天文台_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
推荐引用方式 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.(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.