Supersymmetric model of quasi-degenerate neutrinos

Abstract

We present a supersymmetric model of fermion masses, based on a non-Abelian family symmetry and the Froggatt-Nielsen mechanism, that can account for the solar and atmospheric neutrino problems via quasi-degenerate neutrinos. The model predicts that the ratio of neutrino mass squared splittings Δm^2_{12} / Δm^2_{23} is of order m_s^2/m_b^2, and the angles θ_{12} \sim m_d/m_s and θ_{23} \sim 1, which are of the desired orders of magnitude. We discuss the implications of the flavor structure of the neutrino sector on superparticle masses and mixing angles.

14 pages LaTeX, two EPS figures

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