Chiral condensate and dressed Polyakov loop in the Nambu-Jona-Lasinio model
Mukherjee, TK; Chen H(陈欢); Huang M(黄梅); Chen, H; Huang, M
刊名PHYSICAL REVIEW D
2010
卷号82期号:3页码:34015
学科分类Astronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.82.034015
通讯作者[Mukherjee, Tamal K. ; Chen, Huan ; Huang, Mei] Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China ; [Mukherjee, Tamal K. ; Huang, Mei] Chinese Acad Sci, Theoret Phys Ctr Sci Facil, Beijing, Peoples R China
文章类型Article
英文摘要We investigate the chiral condensate and the dressed Polyakov loop or dual chiral condensate at finite temperature and density in the two-flavor Nambu-Jona-Lasinio model. The dressed Polyakov loop is regarded as an equivalent order parameter of deconfinement phase transition in a confining theory. We find the behavior of a dressed Polyakov loop in the absence of any confinement mechanism quite interesting. With only quark degrees of freedom present, it still shows an order parameter like behavior. It is found that in the chiral limit, the critical temperature for chiral phase transition coincides with that of the dressed Polyakov loop in the whole (T; mu) plane. In the case of explicit chiral symmetry breaking, it is found that the transition temperature for chiral restoration T-c(chi) is smaller than that of the dressed Polyakov loop T-c(D) in the low baryon density region where the transition is a crossover. With the increase of the current quark mass the difference between the two transition temperatures is found to be increasing. However, the two critical temperatures coincide in the high baryon density region where the phase transition is of first order. We give an explanation on the feature of T-c(chi) = T-c(D) in the case of 1st and 2nd order phase transitions, and T-c(chi) < T-c(D) c in the case of crossover, and expect this feature is general and can be extended to full QCD theory. Our result might indicate that in the case of crossover, there exists a small region where chiral symmetry is restored, but the color degrees of freedom are still confined.
类目[WOS]Astronomy & Astrophysics ; Physics, Particles & Fields
研究领域[WOS]Astronomy & Astrophysics ; Physics
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语种英语
WOS记录号WOS:000280864600002
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被引频次:21[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/240551
专题中国科学院高能物理研究所_理论物理室_期刊论文
中国科学院高能物理研究所_加速器中心
中国科学院高能物理研究所_理论物理室
作者单位中国科学院高能物理研究所
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Mukherjee, TK,Chen H,Huang M,et al. Chiral condensate and dressed Polyakov loop in the Nambu-Jona-Lasinio model[J]. PHYSICAL REVIEW D,2010,82(3):34015.
APA Mukherjee, TK,陈欢,黄梅,Chen, H,&Huang, M.(2010).Chiral condensate and dressed Polyakov loop in the Nambu-Jona-Lasinio model.PHYSICAL REVIEW D,82(3),34015.
MLA Mukherjee, TK,et al."Chiral condensate and dressed Polyakov loop in the Nambu-Jona-Lasinio model".PHYSICAL REVIEW D 82.3(2010):34015.
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