SUPERSYMMETRIC MODEL OF QUASI-DEGENERATE NEUTRINOS

We present a supersymmetric model of fermion masses, based on a non-Ab elian family symmetry and the Froggatt-Nielsen mechanism, that can acc ount for the solar and atmospheric neutrino problems via quasi-degener ate neutrinos. The model predicts that the ratio of neutrino mass squa red splittings Delta m(12)(2) /Delta m(23)(2) is of order m(s)(2)/m(b) (2) and the angles theta(12) similar to m(d)/m(s) and theta(23) simila r to 1, which are of the desired orders of magnitude. We discuss the i mplications of the flavor structure of the neutrino sector on superpar ticle masses and mixing angles. (C) 1998 Elsevier Science B.V.