Density-dependent quark mean-field model for nuclear matter and neutron stars

被引：0

作者：

Huang, Kaixuan ^{[1
]}

Shen, Hong ^{[1
]}

Hu, Jinniu ^{[1
,2
]}

Zhang, Ying ^{[3
]}

机构：

[1] Nankai Univ, Sch Phys, Tianjin 300071, Peoples R China

[2] Nankai Univ, Shenzhen Res Inst, Shenzhen 518083, Peoples R China

[3] Tianjin Univ, Sch Sci, Dept Phys, Tianjin 300354, Peoples R China

来源：

PHYSICAL REVIEW C | 2024年 / 109卷 / 04期

基金：

中国国家自然科学基金;

关键词：

EQUATION-OF-STATE;

D O I：

10.1103/PhysRevC.109.045804

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

We develop a density -dependent quark mean -field (DDQMF) model to study the properties of nuclear matter and neutron stars, where the coupling strength between sigma meson and nucleon is generated by the degree of freedom of quarks, while other meson coupling constants are regarded as density -dependent ones. Two values for the nucleon effective mass, M N & lowast; 0 / M N = 0 . 556 , 0 . 70 at the saturation density are chosen based on the consideration of the core -collapse supernova simulation and finite nuclei when the meson -nucleon coupling constants are fixed. We find that the equation of state (EOS) of nuclear matter, the symmetry energy, the mass -radius relations, and the tidal deformabilities of neutron stars with larger nucleon effective mass are more sensitive to the skewness coefficient J 0 . The EOSs with M N & lowast; 0 / M N = 0 . 70 are softer when the skewness coefficient J 0 = - 800 MeV. However, the maximum masses of the neutron star can be around 2 . 32 M 0 with J 0 = 400 MeV regardless of the value of the nucleon effective mass. By manipulating the coupling strength of the isovector meson to generate different slopes of symmetry energy, we construct the neutron star EOSs that can satisfy the different variables from the simultaneous mass -radius measurements of PSR J0030 + 0451, PSR J0740 + 6620 by the NICER collaboration, the mass -radius relations of HESS J1731-347, and the radius constraints from the gravitational -wave signal GW170817 in the framework of a DDQMF model. At the same time, most of these constructed EOSs can also satisfy the constraints of the tidal deformability from GW170817 event.

引用

页数：11

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