Flavour issues in leptogenesis

Asmaa Abada, Sacha Davidson, Francois Xavier Josse-Michaux, Marta Losada, Antonio Riotto

Research output: Contribution to journalArticle

Abstract

We study the impact of flavour in thermal leptogenesis, including the quantum oscillations of the asymmetries in lepton flavour space. In the Boltzmann equations we find different numerical factors and additional terms which can affect the results significantly. For degenerate light neutrinos, the upper bound on the CP asymmetry in a specific flavour is weaker than the bound on the sum. For hierarchical right-handed neutrinos - when flavour dynamics is included - there is no model-independent limit on the light neutrino mass scale, and the lower bound on the reheat temperature is relaxed by a factor of ∼(3-10).

Original languageEnglish (US)
Article number004
JournalJournal of Cosmology and Astroparticle Physics
Issue number4
DOIs
StatePublished - Apr 1 2006

Keywords

  • Baryon asymmetry
  • Cosmological neutrinos

ASJC Scopus subject areas

  • Astronomy and Astrophysics

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