Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-02-02
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 $m_\nu\simeq 0.005-0.052 eV$.
Morisi Stefano
Picariello Marco
Torrente-Lujan Emilio
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