Neutrino scattering rates in neutron star matter with Delta isobars

doi:10.1103/PhysRevC.75.035806

	Neutrino scattering rates in neutron star matter with Delta isobars
	Chen, Yanjun ; Guo, Hua ; Liu, Yuxin
刊名	PHYSICAL REVIEW C
	2007-03-01
卷号	75 页码:7
ISSN号	0556-2813
DOI	10.1103/PhysRevC.75.035806
英文摘要	We take the Delta-isobar degrees of freedom into account in neutron star matter and evaluate their contributions to neutrino scattering cross sections and mean free paths. The neutron star matter is described by means of an effective hadronic model in the relativistic mean-field approximation. It is found that Delta isobars may be present in neutron stars. The electron chemical potential does not decrease and the neutrino abundance does not increase with the increase of the density when neutrinos are trapped in the matter with Delta isobars. The large vector coupling constant between the Delta(-) and neutrino and the high spin of the Delta influence significantly the neutrino scattering cross section and lead the contribution of the Delta(-) to the dominance of the scattering rates. In neutrino-trapped case, the presence of Delta s causes the neutrino mean free path to decrease drastically compared to that in the matter in which baryons are only nucleons.
WOS关键词	RELATIVISTIC MEAN-FIELD ; NUCLEAR-MATTER ; DENSE MATTER ; MODEL ; HOT ; HYPERNUCLEI ; PARTICLES ; SPIN
WOS研究方向	Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000245332200070
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/28193]
专题	中国科学院近代物理研究所
通讯作者	Chen, Yanjun
作者单位	1.Peking Univ, Dept Tech Phys, Beijing 100871, Peoples R China 2.Peking Univ, Dept Phys, Beijing 100871, Peoples R China 3.Peking Univ, MOE Key Lab Heavy Ion Phys, Beijing 100871, Peoples R China 4.Natl Lab Heavy Ion Accelerator, Ctr Theoret Nucl Phys, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Chen, Yanjun,Guo, Hua,Liu, Yuxin. Neutrino scattering rates in neutron star matter with Delta isobars[J]. PHYSICAL REVIEW C,2007,75:7.
APA	Chen, Yanjun,Guo, Hua,&Liu, Yuxin.(2007).Neutrino scattering rates in neutron star matter with Delta isobars.PHYSICAL REVIEW C,75,7.
MLA	Chen, Yanjun,et al."Neutrino scattering rates in neutron star matter with Delta isobars".PHYSICAL REVIEW C 75(2007):7.