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Article Dans Une Revue Journal of High Energy Physics Année : 2006

Flavour Matters in Leptogenesis

A. Abada
  • Fonction : Auteur
Sacha Davidson
A. Ibarra
  • Fonction : Auteur
F. -X. Josse-Michaux
  • Fonction : Auteur
M. Losada
  • Fonction : Auteur
A. Riotto
  • Fonction : Auteur

Résumé

We give analytic approximations to the baryon asymmetry produced by thermal leptogenesis with hierarchical right-handed neutrinos. Our calculation includes flavour-dependent washout processes and CP violation in scattering, and neglects gauge interactions and finite temperature corrections. Our approximate formulae depend upon the three CP asymmetries in the individual lepton flavours as well as on three flavour-dependent efficiency factors. We show that the commonly used expressions for the lepton asymmetry, which depend on the total CP asymmetry and one single efficiency factor, may fail to reproduce the correct lepton asymmetry in a number of cases. We illustrate the importance of using the flavour-dependent formulae in the context of a two right-handed neutrino model.

Dates et versions

in2p3-00077728 , version 1 (01-06-2006)

Identifiants

Citer

A. Abada, Sacha Davidson, A. Ibarra, F. -X. Josse-Michaux, M. Losada, et al.. Flavour Matters in Leptogenesis. Journal of High Energy Physics, 2006, 09, pp.010. ⟨10.1088/1126-6708/2006/09/010⟩. ⟨in2p3-00077728⟩
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