Quark matter in an SU(3) Nambu–Jona-Lasinio model with two types of vector interactions
Quark matter in an SU(3) Nambu–Jona-Lasinio model with two types of vector interactions
复制标题
具有两种类型矢量相互作用的 SU(3) NambuâJona-Lasinio 模型中的夸克物质
DOI：
10.1103/physrevd.93.094032
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发表时间：
2016-05
影响因子：
5
通讯作者：
Yu-Min Dong
中科院分区：
文献类型：
--
作者：
Peng-Cheng Chu;Bin Wang;Hong-Yang Ma;Yu-Min Dong
本文在SU（3）Nambu\char21{}Jona-Lasinio（NJL）模型的框架下研究了两种矢量相互作用下非对称夸克物质和奇异夸克物质的性质：（1）不同味夸克之间的味相关排斥作用，其耦合常数为${G}_{V}$，（2）具有耦合常数${g}_{V}$和${G}_{IV}$的不同味夸克之间的普适排斥和矢量-等矢量相互作用。利用NJL模型中的这两种矢量相互作用，我们研究了非对称夸克物质中的夸克对称能、夸克质量、夸克分数、奇异夸克物质的状态方程、夸克星星的最大质量以及QCD相图的性质.我们发现在SU（3）NJL模型中引入这两种矢量相互作用对夸克物质的对称性能量以及奇异夸克物质和夸克星的性质都有显著的影响。特别地，我们的结果表明，在SU（3）NJL模型中，考虑夸克物质间的万有斥力和矢量-等矢量相互作用，我们可以将PSR $\mathrm {J} 1614\ensuremath {-}2230$和PSR $\mathrm{J}0348+0432$描述为夸克星.
We investigate the properties of asymmetric quark matter and strange quark matter in the framework of the SU(3) Nambu\char21{}Jona-Lasinio (NJL) model with two types of vector interactions: (1) the flavor-dependent repulsion among different flavors of quarks with the coupling constant ${G}_{V}$, and (2) the universal repulsion and the vector-isovector interaction among different flavors of quarks with the coupling constants ${g}_{V}$ and ${G}_{IV}$. Using these two types of vector interactions in the NJL model, we study the quark symmetry energy in asymmetric quark matter, the constituent quark mass, the quark fraction, the equation of state in strange quark matter, the maximum mass of a quark star, and the properties of the QCD phase diagram. We find that including the two types of vector interactions in the SU(3) NJL model can significantly influence the quark matter symmetry energy as well as the properties of strange quark matter and quark stars. In particular, our results indicate that we can describe PSR $\mathrm{J}1614\ensuremath{-}2230$ and PSR $\mathrm{J}0348+0432$ as quark stars by considering the universal repulsion and the vector-isovector interaction among quark matter in the SU(3) NJL model.