Properties of quark matter in a new quasiparticle model with QCD running coupling

Properties of quark matter in a new quasiparticle model with QCD running coupling
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QCD 运行耦合的新准粒子模型中夸克物质的性质

DOI:
10.1007/s11433-015-0524-2
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发表时间:
2016-04
期刊:
SCIENCE CHINA Physics, Mechanics & Astronomy 59(6): 662001
影响因子:
--
通讯作者:
ShiPeng Zhang
ShiPeng Zhang
中科院分区:
其他
文献类型:
--
作者:
ZhenYan Lu;彭光雄;JianFeng Xu;ShiPeng Zhang

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在传统的准粒子模型中,由于有效质量内QCD耦合的运行,导致了热力学不一致性问题。我们提供了一种新的治疗,消除了不一致的有效袋常数。重整化减点的化学势依赖性受化学势空间中的柯西条件的约束。然后在完全自洽准粒子模型下研究了奇异夸克物质的稳定性和微观性质,并将得到的夸克物质状态方程应用于奇异星的研究。结果表明,改进后的模型能够很好地描述质量约为太阳质量两倍的致密星,这表明这样的大质量致密星可能是奇异星。
The running of the QCD coupling in the effective mass causes thermodynamic inconsistency problem in the conventional quasiparticle model. We provide a novel treatment which removes the inconsistency by an effective bag constant. The chemical potential dependence of the renormalization subtraction point is constrained by the Cauchy condition in the chemical potential space. The stability and microscopic properties of strange quark matter are then studied within the completely self-consistent quasiparticle model, and the obtained equation of state of quark matter is applied to the investigation of strange stars. It is found that our improved model can describe well compact stars with mass about two times the solar mass, which indicates that such massive compact stars could be strange stars.
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