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arXiv 1002.0204nucl-th
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中子星中$Λ$超子的超流性

Superfluidity of $Λ$ hyperons in neutron stars

Y. N. Wang, H. Shen

摘要:

研究了中子星物质和中子星中$Λ$超子的$^1S_0$超流性。我们用相对论平均场理论计算了中子星物质的性质。在RMF方法中,介子-超子耦合受到合理的超子势的约束,其中包含了超核物理最新发展的信息。为了研究$Λ$超子的$^1S_0$配对间隙,我们采用了几种基于Nijmegen模型的$ΛΛ$相互作用,并用于双$Λ$超核研究。它被发现,得到的最大配对间隙是一个兆电子伏的十分之几。对能隙的大小和密度区域取决于$ΛΛ$相互作用和中子星物质的处理方式。我们计算了中子星的性质,发现在中子星的核中是否存在$Λ$超子的$^1S_0 $超流性主要取决于所采用的$ΛΛ$相互作用。

英文摘要:

We study the $^1S_0$ superfluidity of $Λ$ 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 $^1S_0$ pairing gap of $Λ$ hyperons, we employ several $ΛΛ$ interactions based on the Nijmegen models and used in double-$Λ$ 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 $ΛΛ$ interaction and the treatment of neutron star matter. We calculate neutron star properties and find that whether the $^1S_0 $ superfluidity of $Λ$ hyperons exists in the core of neutron stars mainly depends on the $ΛΛ$ interaction used.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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