Fritzsch Texture in SUSY-SO(10) with Large Neutrino Mixing

Abstract

Fritzsch's texture is imposed on {\em 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 ${\sin }^{2}2{\theta }_{12}$ 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 $\Delta m_{12}^2\approx {10}^{-10}e{V}^2$, in accordance with the vacuum oscillation solution to the solar-$\nu$ puzzle.

10 pages (standard LaTeX, 3 figures included as postscript files), WU B 93-15

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