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

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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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Authors and Affiliations

  1. Scuola Normale Superiore di Pisa, Piazza dei Cavalieri 7, 56126, Pisa, Italia

    Alberto Salvio & Paolo Lodone

  2. Dipartimento di Fisica dell’Università di Pisa, Largo Bruno Pontecorvo 3, 56127, Pisa, Italia

    Alessandro Strumia

  3. INFN — Sezione di Pisa, Largo Bruno Pontecorvo 3, 56127, Pisa, Italia

    Alberto Salvio, Paolo Lodone & Alessandro Strumia

  4. NICPB, Ravala 10, 10143, Tallinn, Estonia

    Alessandro Strumia

Authors
  1. Alberto Salvio
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  2. Paolo Lodone
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  3. Alessandro Strumia
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Correspondence to Alberto Salvio.

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ArXiv ePrint:1106.2814

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Salvio, A., Lodone, P. & Strumia, A. Towards leptogenesis at NLO: the right-handed neutrino interaction rate. J. High Energ. Phys. 2011, 116 (2011). https://doi.org/10.1007/JHEP08(2011)116

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  • DOI: https://doi.org/10.1007/JHEP08(2011)116

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