Superfluidity of Λ hyperons in neutron stars

被引：49

作者：

Wang, Y. N. ^{[1
]}

Shen, H. ^{[1
]}

机构：

[1] Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China

来源：

PHYSICAL REVIEW C | 2010年 / 81卷 / 02期

基金：

中国国家自然科学基金;

关键词：

MEAN-FIELD-THEORY; EQUATION-OF-STATE; UNSTABLE NUCLEI; DENSE MATTER; HYPERNUCLEI; EMISSION; MODEL;

D O I：

10.1103/PhysRevC.81.025801

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

We study the S-1(0) superfluidity of Lambda hyperons in neutron star matter and neutron stars. We use the relativistic mean field (RMF) theory to calculate the properties of neutron star matter. In the RMF approach, the meson-hyperon couplings are constrained by reasonable hyperon potentials that include the updated information from recent developments in hypernuclear physics. To examine the S-1(0) pairing gap of Lambda hyperons, we employ several Lambda interactions based on the Nijmegen models and used in double-Lambda hypernuclei studies. It is found that the maximal pairing gap obtained is a few tenths of a MeV. The magnitude and the density region of the pairing gap are dependent on the Lambda Lambda interaction and the treatment of neutron star matter. We calculate neutron star properties and find that whether the S-1(0) superfluidity of Lambda hyperons exists in the core of neutron stars mainly depends on the Lambda Lambda interaction used.

引用

页数：8

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