Effect of short-range correlation on the density dependence of nuclear symmetry energy at supra-saturation densities

doi:10.1140/epja/i2014-14113-y

	Effect of short-range correlation on the density dependence of nuclear symmetry energy at supra-saturation densities
	Zhang, Xin 1,2; Xu, Chang 1,2,3; Ren, Zhongzhou 1,2,3,4
刊名	EUROPEAN PHYSICAL JOURNAL A
	2014-07-16
卷号	50
ISSN号	1434-6001
DOI	10.1140/epja/i2014-14113-y
文献子类	Article
英文摘要	Short-range correlation (SRC) induces a significant high-momentum component in the nucleon momentum distribution n(k) in both finite nuclei and nuclear matter. Recent experiments suggest that the amount of correlation in pure neutron matter (PNM) may be much less than that in symmetric nuclear matter (SNM). In this paper we investigate on a qualitative level how this affects the density dependence of the symmetry energy, especially at supra-saturation densities, in the framework of the well-established MDI energy density functional. In the MDI formalism, SRC affects both the kinetic energy and the potential energy through its effect on n(k). For the n(k) of SNM, we use a formula proposed based on an interesting relation between n(k) at high momentumk (i.e. k > kF) and the average nucleon density of finite nuclei. For the n(k) of PNM, we use the prediction of a free Fermi gas model. The result is compared to the symmetry energy calculated assuming both the SNM and PNM to be Fermi-gas like. Our study shows that, to have a realistic estimation of the relative contributions to the symmetry energy from the kinetic part and the two-body and three-body potential part, one has to take the SRC effect into account. Furthermore, it is found that the density dependence of the symmetry energy at supra-saturation densities is sensitive to the competition between the SRC effect and the three-body force effect.
资助项目	973 National Major State Basic Research and Development of China[2007CB815004] ; 973 National Major State Basic Research and Development of China[2010CB327803]
WOS关键词	NEUTRON-STAR STRUCTURE ; SPECTRAL-FUNCTION ; MATTER ; EQUATION ; PHYSICS ; RADII
WOS研究方向	Physics
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000351062600002
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/49385]
专题	中国科学院近代物理研究所
通讯作者	Zhang, Xin
作者单位	1.Nanjing Univ, Dept Phys, Nanjing 210008, Jiangsu, Peoples R China 2.Nanjing Univ, Key Lab Modern Acoust, Nanjing 210008, Jiangsu, Peoples R China 3.Nanjing Univ, Joint Ctr Nucl Sci & Technol, Nanjing 210093, Jiangsu, 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	Zhang, Xin,Xu, Chang,Ren, Zhongzhou. Effect of short-range correlation on the density dependence of nuclear symmetry energy at supra-saturation densities[J]. EUROPEAN PHYSICAL JOURNAL A,2014,50.
APA	Zhang, Xin,Xu, Chang,&Ren, Zhongzhou.(2014).Effect of short-range correlation on the density dependence of nuclear symmetry energy at supra-saturation densities.EUROPEAN PHYSICAL JOURNAL A,50.
MLA	Zhang, Xin,et al."Effect of short-range correlation on the density dependence of nuclear symmetry energy at supra-saturation densities".EUROPEAN PHYSICAL JOURNAL A 50(2014).