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arXiv · 1106.2814

Towards leptogenesis at NLO: the right-handed neutrino interaction rate

Alberto Salvio·Paolo Lodone·Alessandro Strumia
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Abstract

We compute quantum and thermal corrections to the right-handed neutrino interaction rate in the early universe at next-to-leading order in all the relevant SM couplings (gauge, top Yukawa and higgs couplings). Previous computations considered 2 -> 2 scatterings, finding infra-red divergences. The KLN theorem demands that infra-red divergences cancel in the full result: after adding 1 -> 3 and one-loop virtual corrections that enter at the same order we find a simple result.

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Alberto Salvio, Paolo Lodone, Alessandro Strumia. 2013-11-20. Towards leptogenesis at NLO: the right-handed neutrino interaction rate. https://doi.org/10.1007/jhep08(2011)116

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