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Impacts of nucleon-nucleon short-range correlations on neutron stars
Nuclear Physics A ( IF 1.7 ) Pub Date : 2021-04-19 , DOI: 10.1016/j.nuclphysa.2021.122200
Hao Lu , Zhongzhou Ren , Dong Bai

Nucleon-nucleon short-range correlations (SRCs) are inevitable consequences of realistic nucleon-nucleon interactions. The corresponding SRC pairs, characterized by high relative momenta, have been verified experimentally to be important in finite nuclei. In this work, we study the impacts of nucleon-nucleon SRCs on the physical properties of neutron stars. Considering the small center-of-mass momenta of SRC pairs, new nucleon momentum distributions with high-momentum tails (HMTs) are proposed by extrapolating well-established experimental results of SRCs in finite nuclei to neutron star matter. HMTs with different shapes are adopted to estimate theoretical uncertainties. It is found that nucleon-nucleon SRCs generally stiffen the equation of state of neutron star matter and increase the maximum mass of neutron stars.



中文翻译:

核子-核子短程相关对中子星的影响

核子-核子短程相关性(SRC)是现实的核子-核子相互作用的必然结果。以高相对动量为特征的相应SRC对已通过实验证明在有限原子核中很重要。在这项工作中,我们研究了核子-核子SRC对中子星物理性质的影响。考虑到SRC对的小质心动量,通过将有限核中已确立的SRC实验结果外推到中子星体,提出了具有高动量尾部(HMT)的新核子动量分布。采用不同形状的HMT来估计理论不确定性。已发现,核子-核子SRC通常会使中子星物质的状态方程变硬,并增加中子星的最大质量。

更新日期:2021-04-23
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