Towards leptogenesis at NLO: the right-handed neutrino interaction rate
Towards leptogenesis at NLO: the right-handed neutrino interaction rate
复制标题
走向 NLO 的轻子发生:右手中微子相互作用率
DOI:
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发表时间:
2011
期刊:
影响因子:
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通讯作者:
A. Strumia
中科院分区:
文献类型:
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作者:
A. Salvio;P. Lodone;A. Strumia
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.