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题名: Isospin properties of quark matter from a 3-flavor NJL model
作者: Liu, H; Xu, J; Chen, LW; Sun, KJ
刊名: PHYSICAL REVIEW D
出版日期: 2016
卷号: 94, 期号:6, 页码:-
DOI: 10.1103/PhysRevD.94.065032
通讯作者: Xu, J (reprint author), Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China.
文章类型: 期刊论文
英文摘要: We have studied the properties of hot and dense quark matter based on the 3-flavor Nambu-Jona-Lasinio (NJL) model as well as its Polyakov-loop extension (pNJL) with scalar-isovector and vector-isovector couplings. Provided a considerable large isospin asymmetry or isospin chemical potential, isospin splittings of constituent mass, chiral phase transition boundary, and critical point for u and d quarks can be observed for positive isovector coupling constants but are suppressed for negative ones. The quark matter symmetry energy decreases with the increasing isovector coupling constant, and is mostly enhanced in the pNJL model than in the NJL model. A positive scalar-isovector coupling constant is more likely to lead to an unstable isospin asymmetric quark matter. The isovector coupling has been further found to affect particle fractions as well as the equation of state in hybrid stars. Possible effects on the isospin properties of quark matter have also been discussed if the strangeness sector is further broken among the flavor symmetry.
收录类别: SCI
语种: 英语
WOS记录号: WOS:000384075500007
ISSN号: 2470-0010
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.sinap.ac.cn/handle/331007/26552
Appears in Collections:中科院上海应用物理研究所2011-2017年_期刊论文

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