A model for fermion masses and lepton mixing in SO(10) x A4

Details A model for fermion masses and lepton mixing in SO(10) x A4 A model for fermion masses and lepton mixing in SO(10) x A4

2007-02-02

arxiv.org/abs/hep-ph/0702034v2

Phys.Rev.D75:075015,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages. V2: Final version to appear in the journal

Scientific paper

10.1103/PhysRevD.75.075015

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 it has been proposed a model 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 seesaw mechanism. We fit at tree level 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 consequence of the A4 properties. Moreover, our model predicts the absolute value of the neutrino masses, these ones are in the range $m_\nu\simeq 0.005-0.052 eV$.

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