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Isovector scalar field effects in asymmetric nuclear matter
Liu Bo; Shen Cai-Wan; Di Toro, M.; Zhao En-Guang; Liu, B , Natl Lab Heavy Ion Accelerator, Ctr Theoret Nucl Phys, Lanzhou 730000, Peoples R China
2008
发表期刊COMMUNICATIONS IN THEORETICAL PHYSICS
ISSN0253-6102
卷号49期号:1页码:199-206
摘要Density-dependent parametrization models of the nucleon-meson coupling constants, including the isovector scalar delta-field, are applied to asymmetric nuclear matter. The nuclear equation of state (EOS) and the neutron star properties are studied in a relativistic Lagrangian density, using the relativistic mean field (RMF) hadron theory. It is known that the delta-fleld in the constant coupling scheme leads to a larger repulsion in dense neutron-rich matter and to a definite splitting of proton and neutron effective masses, finally influences the stability of the neutron stars. We use density-dependent models of the nucleon-meson couplings to study the properties of neutron star matter and to reexamine the delta-held effects in asymmetric nuclear matter. Our calculation shows that the stability conditions of the neutron star matter can be improved in presence of the delta-meson in the density-dependent models of the coupling constants. The EOS of nuclear matter strongly depends on the density dependence of the interactions.
部门归属[Liu, B; Shen, CW] Natl Lab Heavy Ion Accelerator, Ctr Theoret Nucl Phys, Lanzhou 730000, Peoples R China; [Liu, B] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China; [Shen, CW] Huzhou Teachers Coll, Sch Sci, Huzhou 313000, Peoples R China; [Di Toro, M] Lab Nazl Sud, I-95123 Catania, Italy; [Di Toro, M] Univ Catania, I-95124 Catania, Italy; [Zhao, EG] Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
关键词Neutron-stars Equation State Flow
学科领域Physics
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收录类别SCI
WOS记录号WOS:000252640100041
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文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/5594
专题理论物理所1978-2010年知识产出
通讯作者Liu, B , Natl Lab Heavy Ion Accelerator, Ctr Theoret Nucl Phys, Lanzhou 730000, Peoples R China
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GB/T 7714
Liu Bo,Shen Cai-Wan,Di Toro, M.,et al. Isovector scalar field effects in asymmetric nuclear matter[J]. COMMUNICATIONS IN THEORETICAL PHYSICS,2008,49(1):199-206.
APA Liu Bo,Shen Cai-Wan,Di Toro, M.,Zhao En-Guang,&Liu, B , Natl Lab Heavy Ion Accelerator, Ctr Theoret Nucl Phys, Lanzhou 730000, Peoples R China.(2008).Isovector scalar field effects in asymmetric nuclear matter.COMMUNICATIONS IN THEORETICAL PHYSICS,49(1),199-206.
MLA Liu Bo,et al."Isovector scalar field effects in asymmetric nuclear matter".COMMUNICATIONS IN THEORETICAL PHYSICS 49.1(2008):199-206.
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