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

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

2011-06-14

arxiv.org/abs/1106.2814v3

JHEP 1108:116,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

20 pages, 9 figures, error fixed in an equation right after Eqs. (18)

Scientific paper

10.1007/JHEP08(2011)116

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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