再论中子星中由库珀对复合引起的中微子发射
Neutrino emission due to Cooper-pair recombination in neutron stars revisited
摘要：
采用超流费米液体的拉金-米格达尔-莱格特方法计算了中子和质子库珀对破裂和形成过程中的中微子发射。我们明确地证明了费米液体重整化遵守沃德恒等式，并确保弱矢量流守恒。本文对小温度和核子费米速度下的发射率v_{F,i}（i=n，p）进行了系统的展开。中子和质子过程都主要受轴向矢量流贡献的控制，而轴向矢量流在超流物质中的贡献变化不大。因此，与早期的计算相比，1S_0态中子对的过程的总发射率被抑制了~（0.9-1.2）v_{F,n} ^2。质子上的过程也会出现类似的抑制因子（~ v_{F,p} ^2）。
英文摘要：
Neutrino emission in processes of breaking and formation of neutron and proton Cooper pairs is calculated within the Larkin-Migdal-Leggett approach for a superfluid Fermi liquid. We demonstrate explicitly that the Fermi-liquid renormalization respects the Ward identity and assures the weak vector current conservation. The systematic expansion of the emissivities for small temperatures and nucleon Fermi velocity, v_{F,i}, i=n,p, is performed. Both neutron and proton processes are mainly controlled by the axial-vector current contributions, which are not strongly changed in the superfluid matter. Thus, compared to earlier calculations the total emissivity of processes on neutrons paired in the 1S_0 state is suppressed by a factor ~(0.9-1.2) v_{F,n}^2. A similar suppression factor (~v_{F,p}^2) arises for processes on protons.
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。
