Neutrino Mixings and Grand Unification: SU(5) GUT with Anomaly free U(1)_F

摘要

The model of supersymmetric SU(5) GUT augmented with anomaly freeU(1)F flavor symmetry is presented. The field content and the U(1)F charge assignment is obtained by specific embedding of SU(5)×U(1)F in larger non-Abelian group. We focus on a particular case which gives very economical field content with the U(1)F charges fixed in such a way that for quarks and leptons appealing texture zero Yukawa couplings are generated. The model gives realistic fermion masses and mixings and predict inverted hierarchical neutrino mass scenario with interesting implications.