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

Towards leptogenesis at NLO: the right-handed neutrino interaction rate
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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
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通讯作者:
A. Strumia
A. Strumia
中科院分区:
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文献类型:
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作者:
A. Salvio;P. Lodone;A. Strumia

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我们计算了早期宇宙中所有相关SM耦合(Gauge、top Yukawa和Higgs耦合)中微子右手相互作用速率的量子和热修正。之前的计算考虑了2个 → 2散射,发现了红外线发散。KLN定理要求红外发散在全部结果中被抵消:在添加1、 → 、3和以相同顺序进入的单圈虚拟校正之后,我们得到一个简单的结果。
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.