2003/11/30 by Walter Grimus, W. Grimus, L. Lavoura · 2 citations
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Neutrino Physics Research #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.1088/0954-3899/30/9/008
published as J.Phys. G30 (2004) 1073-1088 · 22 pages, plain Latex, 3 figures; changes in the presentation, clarifications and one reference added, final version for J. Phys. G
arxiv created 2004/05/25 · openalex publication_date 2004/08/03 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
We study leptogenesis in two seesaw models where maximal atmospheric neutrino mixing and U e 3 = 0 result from symmetries. Salient features of those models are the existence of three Higgs doublets and a two-fold degeneracy of the neutrino Dirac mass matrix. We find that in those models both leptogenesis and neutrinoless double beta decay depend on the same unique Majorana phase. Leptogenesis can produce a baryon asymmetry of the universe of the right size provided the mass of the heavy neutrino whose decays generate the lepton asymmetry is in the range 10 11 –10 12 GeV. Moreover, in these models, leptogenesis precludes an inverted neutrino mass spectrum since it requires the mass of the lightest neutrino to be in the range 10 −3 –10 −2 eV.