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 in	Chinese physics C Vol. 37; no. 4; pp. 57 - 60
Main Author	刘贝贝欧阳飞陈伟
Format	Journal Article
Language	English
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
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ISSN	1674-1137 0254-3052
DOI	10.1088/1674-1137/37/4/044103

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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） ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23
ISSN:	1674-1137 0254-3052
DOI:	10.1088/1674-1137/37/4/044103