FRITZSCH TEXTURE IN SUSY-SO(10) WITH LARGE NEUTRINO MIXING

Fritzsch's texture is imposed on all mass matrices in a SUSY-SO(10) via a family U(1)PQ symmetry. The observed charged fermion parameters fix the nu-masses and mixing, while the later are evolved from the GUT scale to low energies using the RG. Large sin2 2theta12 results as in a SUSY-GUT no intermediate scale is allowed, the RH-neutrino scale is the unification one and this gives in our model DELTAm12(2) almost-equal-to 10(-10) eV2, in accordance with the vacuum oscillation solution to the solar-nu puzzle.