中国物理B ›› 2012, Vol. 21 ›› Issue (8): 89701-089701.doi: 10.1088/1674-1056/21/8/089701

• GEOPHYSICS, ASTRONOMY, AND ASTROPHYSICS • 上一篇    

A set of new nucleon coupling constants and the proto neutron star matter

赵先锋, 贾焕玉   

  1. a College of Mechanical and Electronic Engineering, Chuzhou University, Chuzhou 239000, China;
    b Institute for Modern Physics, Southwest Jiaotong University, Chengdu 610031, China
  • 收稿日期:2012-02-02 修回日期:2012-02-28 出版日期:2012-07-01 发布日期:2012-07-01
  • 基金资助:
    Project supported by the Natural Science Foundation of Anhui Province of China (Grant No. 1208085MA09), the Science Research Program of Institutions of Higher Education of Anhui Province of China (Grant No. KJ2012Z297), and the Fundamental Research Funds for the Central Universities (Grant No. SWJTU12ZT11).

A set of new nucleon coupling constants and the proto neutron star matter

Zhao Xian-Feng (赵先锋), Jia Huan-Yu (贾焕玉)   

  1. a College of Mechanical and Electronic Engineering, Chuzhou University, Chuzhou 239000, China;
    b Institute for Modern Physics, Southwest Jiaotong University, Chengdu 610031, China
  • Received:2012-02-02 Revised:2012-02-28 Online:2012-07-01 Published:2012-07-01
  • Contact: Zhao Xian-Feng E-mail:zhaopioneer.student@sina.com
  • Supported by:
    Project supported by the Natural Science Foundation of Anhui Province of China (Grant No. 1208085MA09), the Science Research Program of Institutions of Higher Education of Anhui Province of China (Grant No. KJ2012Z297), and the Fundamental Research Funds for the Central Universities (Grant No. SWJTU12ZT11).

摘要: Using a new set of nucleon coupling constants CZ11 the properties of a proto neutron star is examined within the framework of the relativistic mean-field theory for the baryon octet system. It is found that the relative number density of Λ, Ξ-, and Ξ0 for CZ11 are all smaller than those for GL97 and either for CZ11 or for GL97, Σ-, Σ0, and Σ+ all do not appear. It is also found that the pressure and the maximum mass for CZ11 are all smaller than those for GL97. The maximum mass for CZ11 decreases by approximate 9 percent compared with that for GL97.

关键词: nucleon coupling constants, relativistic mean-field theory, proto neutron star

Abstract: Using a new set of nucleon coupling constants CZ11 the properties of a proto neutron star is examined within the framework of the relativistic mean-field theory for the baryon octet system. It is found that the relative number density of Λ, Ξ-, and Ξ0 for CZ11 are all smaller than those for GL97 and either for CZ11 or for GL97, Σ-, Σ0, and Σ+ all do not appear. It is also found that the pressure and the maximum mass for CZ11 are all smaller than those for GL97. The maximum mass for CZ11 decreases by approximate 9 percent compared with that for GL97.

Key words: nucleon coupling constants, relativistic mean-field theory, proto neutron star

中图分类号:  (Neutron stars)

  • 97.60.Jd
26.60.Kp (Equations of state of neutron-star matter) 21.65.Mn (Equations of state of nuclear matter)