2007/02/28 by Stefano Morisi, Marco Picariello, E. Torrente-Luján +1 · 13 citations
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Neutrino Physics Research #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.1103/physrevd.75.075015
published as Phys.Rev.D75:075015,2007 · 15 pages. V2: Final version to appear in the journal
arxiv created 2007/03/28 · openalex publication_date 2007/04/20 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The discrete flavor symmetry A4 explains very well neutrino data at low energy, but it seems difficult to extend it to grand unified models since, in general, left-handed and right-handed fields belong to different A4 representations. Recently a model has been proposed where all the fermions equally transform under A4. We study here a concrete SO(10) realization of such a model providing small neutrino masses through the see-saw mechanism. We fit the charged fermion masses run up to the unification scale. Some fermion masses properties come from the SO(10) symmetry while lepton mixing angles are a consequence of the A4 properties. Moreover, our model predicts the absolute value of the neutrino masses; these are in the range m_\ensuremathν\ensuremath≃0.005--0.052 eV.