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arXiv 1110.2145nucl-thastro-ph.SRhep-ph
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中子星超流核$^{3}P_{2}$ - $^{3}F_{2}$的中微子发射率

Neutrino emissivity of $^{3}P_{2}$-$^{3}F_{2}$ superfluid cores in neutron stars

L. B. Leinson

摘要:

在BCS近似下,研究了$^{3}F_{2}$态的混合对三重态超流中子液体中集体自旋振荡和中微子发射过程的影响。在三重态超流中子凝聚体中,除了已知的$ω\simeqΔ/\sqrt{5}$模式外,还存在着含$ω\simeq\sqrt{58/35}Δ$的自旋振荡本征模式.凝聚体中高频自旋振荡的激发是通过准粒子间的张量相互作用发生的。通过中性弱电流的中微子能量损失被发现由三个单独的贡献所造成的复合破碎的库珀对和弱衰变的集体模式的自旋振荡。低频自旋波的中微子衰变在中子星的冷却过程中起着重要的作用。高频振荡的弱衰减,只发生在张量力被考虑在配对相互作用不会修改实质上的总能量损失。提出了中微子总发射率的简单表达式。

英文摘要:

The influence of the admixture of the $^{3}F_{2}$ state onto collective spin oscillations and neutrino emission processes in the triplet superfluid neutron liquid is studied in the BCS approximation. The eigen mode of spin oscillations with $ω\simeq\sqrt{58/35}Δ$ is predicted to exist in the triplet superfluid neutron condensate besides the already known mode $ω\simeqΔ/\sqrt{5}$. Excitation of the high-frequency spin oscillations in the condensate occurs through the tensor interactions between quasiparticles. Neutrino energy losses through neutral weak currents are found to consist of three separate contributions caused by a recombination of broken Cooper pairs and by weak decays of the collective modes of spin oscillations. Neutrino decays of the low-frequency spin waves can play an important role in the cooling scenario of neutron stars. Weak decays of the high-frequency oscillations that occur only if the tensor forces are taken into account in the pairing interactions does not modify substantially the total energy losses. Simple expressions are suggested for the total neutrino emissivity.

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