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Triplet pairing in pure neutron matter

机译：三胞胎配对纯中子物质

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We study the zero-temperature BCS gaps for the triplet channel in pure neutron matter using similarity renormalization group (SRG) evolved interactions. We use the dependence of the results on the SRG resolution scale as a tool to analyze medium and many-body corrections. In particular, we study the effects of including the three-body interactions at leading order, which appear at next-to-next-to leading order (N2LO) in the chiral effective field theory (EFT), as well as that of the first-order self-energy corrections on the zero-temperature gap. In addition we also extract the transition temperature as a function of densities and verify the BCS scaling of the zero-temperature gaps to the transition temperature. We observe that the self-energy effects are very crucial in order to reduce the SRG resolution scale dependence of the results, while the three-body effects at the leading order do not change the two-body resolution scale dependence. On the other hand, the results depend strongly on the three-body cutoff, emphasizing the importance of the missing higher-order three-body effects. We also observe that self-energy effects reduce the overall gap as well as shift the gap closure to lower densities.
机译：我们使用相似性重整化组（SRG）进化相互作用研究纯中子物质中三重态通道的零温度BCS间隙。我们使用对SRG分辨率刻度的结果的依赖作为分析媒体和许多身体校正的工具。特别是，我们研究了在手性有效场理论（EFT）的下一次秩序（N2LO）下出现的领先订单中的三体相互作用的影响，以及第一个 - 零温度差距对自能校正。此外，我们还将转变温度提取为密度的函数，并验证BCS将零温度间隙的缩放到过渡温度。我们观察到自我能量效应是非常重要的，以降低结果的SRG分辨率尺度依赖性，而领导顺序的三体效应不会改变双体分辨率尺度依赖性。另一方面，结果强烈地依赖于三体截止，强调缺少高阶三体效应的重要性。我们还观察到自能效应降低整体间隙，并将间隙闭合缩小到更低的密度。

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