Influence of coupling constants on nuclear symmetry energy

By studying the energy of neutron star matter, we discuss the nuclear symmetry energy at different baryon densities and different coupling constants in the relativistic mean field approximation. The results show that the symmetry energy increases with baryon density at various coupling constants and...

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Bibliographic Details
Published inChinese physics C Vol. 37; no. 4; pp. 57 - 60
Main Author 刘贝贝 欧阳飞 陈伟
Format Journal Article
LanguageEnglish
Published 01.04.2013
Subjects
Baryons
Constants
Density
Energy (nuclear)
Incompressibility
Joining
Neural networks
Symmetry
不可压缩性
中子星物质
对称性
对称能
平均场近似
耦合常数
能量
重子密度
Online AccessGet full text
ISSN1674-1137
0254-3052
DOI10.1088/1674-1137/37/4/044103

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Summary:By studying the energy of neutron star matter, we discuss the nuclear symmetry energy at different baryon densities and different coupling constants in the relativistic mean field approximation. The results show that the symmetry energy increases with baryon density at various coupling constants and incompressibilities. Further-more, the symmetry energy at saturation density increases with increasing incompressibility at fixed d, and decreases at fixed c. Specifically, when coupling constants gv and gs are fixed, respectively, the symmetry energy has a little change with increasing incompressibility. It is demonstrated that the NN coupling constants have greater influences on the symmetry energy than the self-coupling constants.
Bibliography:11-5641/O4
By studying the energy of neutron star matter, we discuss the nuclear symmetry energy at different baryon densities and different coupling constants in the relativistic mean field approximation. The results show that the symmetry energy increases with baryon density at various coupling constants and incompressibilities. Further-more, the symmetry energy at saturation density increases with increasing incompressibility at fixed d, and decreases at fixed c. Specifically, when coupling constants gv and gs are fixed, respectively, the symmetry energy has a little change with increasing incompressibility. It is demonstrated that the NN coupling constants have greater influences on the symmetry energy than the self-coupling constants.
symmetry energy； relativistic mean field approximation； coupling constant； incompressibility
LIU Bei-Bei, OUYANG Fei,CHEN Wei（Department of Physics, Jinan University, Guangzhou 510632, China）
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SourceType-Scholarly Journals-1
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ISSN:1674-1137
0254-3052
DOI:10.1088/1674-1137/37/4/044103