Properties of strange quark matter and a quark star with axion interactions within an SU(3) Nambu-Jona-Lasinio model

被引：0

作者：

Chu, Peng-Cheng ^{[1
]}

Liu, He ^{[1
]}

Liu, Hong-Ming ^{[1
]}

Li, Xiao-Hua ^{[2
,3
]}

Ju, Min ^{[4
]}

Wu, Xu-Hao ^{[5
]}

Zhou, Ying ^{[6
]}

机构：

[1] Qingdao Univ Technol, Res Ctr Theoret Phys, Sci Sch, Qingdao 266033, Peoples R China

[2] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China

[3] Univ South China, Cooperat Innovat Ctr Nucl Fuel Cycle Technol & Equ, Hengyang 421001, Peoples R China

[4] China Univ Petr East China, Coll Sci, Qingdao 266580, Peoples R China

[5] Yanshan Univ, Sch Sci, Qinhuangdao 066004, Peoples R China

[6] Inner Mongolia Univ, Sch Phys Sci & Technol, Hohhot 010021, Peoples R China

来源：

PHYSICAL REVIEW D | 2024年 / 110卷 / 12期

关键词：

NEUTRON-STARS; FINITE-TEMPERATURE; CP CONSERVATION; MASS; CONSTRAINTS; ENERGY;

D O I：

10.1103/PhysRevD.110.123031

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We investigate the properties of quark matter and quark stars (QSs) within the SU(3) Nambu-JonaLasinio model, considering the effects of axion fields and vector interactions. Under the assumption of the absolutely stable condition of strange quark matter, we find that including axion effects and vector interactions significantly influences the equation of state, constituent quark mass, isospin asymmetry for u and d quarks, quark fractions, sound velocity, and the maximum mass of QSs. In particular, our results indicate that the central baryon density of the maximum star mass and the polytropic index gamma both decrease with increasing star mass, and we can describe the recently observed extremely large pulsars as QSs using absolutely stable strange quark matter.

引用

页数：8

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