超音中子星中中子和质子的单重配对能隙
Singlet pairing gaps of neutrons and protons in hyperonic neutron stars
摘要：
在相对论平均场模型和Bardeen-Cooper-Schrieffer理论下研究了超声波中子星中的$^{1}S_{0}$核超流体。以Reid软核相互作用为核子-核子相互作用，计算了中子和质子的$^{1}S_{0}$配对能隙。我们详细研究了超子自由度对中子星物质中$^{1}S_{0}$核子对能隙的影响。结果表明，超子的出现对$^{1}S_{0}$中子配对能隙的重子密度范围和大小几乎没有影响，质子配对能隙在该区域$ρ_B=0.0-0.393$ fm $^{-3}$也略有减小.然而，如果重子密度变得大于0.393 fm ${^{-3}}$，则$^{1}S_{0}$质子配对间隙明显增大。此外，超子的存在还使质子超流的范围明显扩大。在我们的结果中，超子改变了$^{1}S_{0}$质子配对间隙，这必然改变了中子星的冷却性质。
英文摘要：
The $^{1}S_{0}$ nucleonic superfluids are investigated within the relativistic mean-field model and Bardeen-Cooper-Schrieffer theory in hyperonic neutron stars. The $^{1}S_{0}$ pairing gaps of neutrons and protons are calculated based on the Reid soft-core interaction as the nucleon-nucleon interaction. We have studied particularly the influence of hyperons degrees of freedom on the $^{1}S_{0}$ nucleonic pairing gap in neutron star matter. It is found that the appearance of hyperons has little impact on baryonic density range and size for the $^{1}S_{0}$ neutronic pairing gap, the $^{1}S_{0}$ protonic pairing gap also decreases slightly in this region $ρ_B=0.0-0.393$ fm$^{-3}$. However, if baryonic density becomes greater than 0.393 fm${^{-3}}$, the $^{1}S_{0}$ protonic pairing gap obviously increases. In addition, the protonic superfluid range is obviously enlarged due to the presence of hyperons. In our results, the hyperons change the $^{1}S_{0}$ protonic pairing gap which must change the cooling properties of neutron stars.
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