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Model for fermion masses and lepton mixing in SO(10) x A(4)

AuthorsMorisi, Stefano; Picariello, Marco; Torrente Luján, Emilio
KeywordsNeutrino mass
Neutrino oscillations
SO(10) groups
Discrete symmetries
Grand unified theory
Issue Date20-Apr-2007
PublisherAmerican Physical Society
CitationPhysical Review D 75(7): 075015 (2007)
AbstractThe discrete flavor symmetry A(4) 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 A(4) representations. Recently a model has been proposed where all the fermions equally transform under A(4). 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 A(4) properties. Moreover, our model predicts the absolute value of the neutrino masses; these are in the range m(nu)similar or equal to 0.005-0.052 eV.
Description8 pages.-- PACS nrs.: 11.30.Hv; 12.10.-g; 12.15.Ff; 14.60.Pq.-- ISI Article Identifier: 000246076700079.-- ArXiv pre-print available at: http://arxiv.org/abs/hep-ph/0702034
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevD.75.075015
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