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
	Zong Hong-Shi; Hou Feng-Yao; Jiang Yu; Sun Wei-Min; Hou, FY , Nanjing Univ, Dept Phys, Nanjing 210093, Peoples R China
刊名	COMMUNICATIONS IN THEORETICAL PHYSICS
	2009
卷号	51 期号:3 页码:499-505
关键词	Chiral-symmetry Restoration Dyson-schwinger Equations Decay Constant Compact Stars Self-energy Transition Breaking Physics Matter
ISSN号	0253-6102
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.
学科主题	Physics
WOS记录号	WOS:000264755300022
公开日期	2012-08-02
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/5369]
专题	理论物理研究所_理论物理所1978-2010年知识产出
通讯作者	Hou, FY , Nanjing Univ, Dept Phys, Nanjing 210093, Peoples R China
推荐引用方式 GB/T 7714	Zong Hong-Shi,Hou Feng-Yao,Jiang Yu,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	Zong Hong-Shi,Hou Feng-Yao,Jiang Yu,Sun Wei-Min,&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	Zong Hong-Shi,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.