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arXiv 1209.2869hep-ph
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非相对论区域中热右手中微子的自能

Thermal right-handed neutrino self-energy in the non-relativistic regime

M. Laine

摘要:

最近,对稀薄成因的辐射校正问题已经被提出。考虑到“强洗出”机制,在这种机制中,OPE-techniques允许简化设置,我们报告了在标准模型耦合下重右手中微子在NLO(双圈能级)下的热自能矩阵。重整化表达式描述了化学解耦右手中微子的味跃迁和“包容性”衰变。虽然CP违反没有解决,结果可能会发现在现有的leptogenesis框架的使用。

英文摘要:

Recently the issue of radiative corrections to leptogenesis has been raised. Considering the "strong washout" regime, in which OPE-techniques permit to streamline the setup, we report the thermal self-energy matrix of heavy right-handed neutrinos at NLO (resummed 2-loop level) in Standard Model couplings. The renormalized expression describes flavour transitions and "inclusive" decays of chemically decoupled right-handed neutrinos. Although CP-violation is not addressed, the result may find use in existing leptogenesis frameworks.

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