delta MESON EFFECTS ON ASYMMETRIC NUCLEAR MATTER

	delta MESON EFFECTS ON ASYMMETRIC NUCLEAR MATTER
	Liu, B.1,2 ; Di Toro, M.3,4; Greco, V.3,4
刊名	INTERNATIONAL JOURNAL OF MODERN PHYSICS E-NUCLEAR PHYSICS
	2008-10-01
卷号	17 页码:1815-1824
ISSN号	0218-3013
英文摘要	The impact of a delta meson field (the scalar-isovector channel) on asymmetric nuclear matter is studied within relativistic mean-field (RMF) models with both constant and density dependent (DD) nucleon-meson couplings. The Equation of State (EOS) for asymmetric nuclear matter and the neutron star properties by the different models are compared. We find that the delta-field 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 influencing the stability of the neutron stars. A broader analysis of possible delta-field effects is achieved considering also density dependent nucleon-meson coupling. A remarkable effect on the relation between mass and radius for the neutron stars is seen, showing a significant reduction of the radius along with a moderate mass reduction due to the increase of the effective delta coupling in high density regions.
WOS关键词	HEAVY-ION COLLISIONS ; SYMMETRY ENERGY ; NEUTRON-STARS ; DENSITY ; EQUATION ; STATE ; FLOW
WOS研究方向	Physics
语种	英语
出版者	WORLD SCIENTIFIC PUBL CO PTE LTD
WOS记录号	WOS:000261388500018
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/28351]
专题	中国科学院近代物理研究所
通讯作者	Liu, B.
作者单位	1.Natl Lab Heavy Ion Accelerator, Ctr Theoret Nucl Phys, Lanzhou 730000, Peoples R China 2.Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China 3.Lab Nazl Sud, I-95123 Catania, Italy 4.Univ Catania, I-95124 Catania, Italy
推荐引用方式 GB/T 7714	Liu, B.,Di Toro, M.,Greco, V.. delta MESON EFFECTS ON ASYMMETRIC NUCLEAR MATTER[J]. INTERNATIONAL JOURNAL OF MODERN PHYSICS E-NUCLEAR PHYSICS,2008,17:1815-1824.
APA	Liu, B.,Di Toro, M.,&Greco, V..(2008).delta MESON EFFECTS ON ASYMMETRIC NUCLEAR MATTER.INTERNATIONAL JOURNAL OF MODERN PHYSICS E-NUCLEAR PHYSICS,17,1815-1824.
MLA	Liu, B.,et al."delta MESON EFFECTS ON ASYMMETRIC NUCLEAR MATTER".INTERNATIONAL JOURNAL OF MODERN PHYSICS E-NUCLEAR PHYSICS 17(2008):1815-1824.