Embedding Phenomenological Quark-Lepton Mass Matrices into SU(5) Gauge Models

Abstract

We construct phenomenological quark-lepton mass matrices based on S${}_3$ permutation symmetry in a manner fully compatible with SU(5) grand unification. The Higgs particles we need are {\bf 5}, {\bf 45} and their conjugates. The model gives a charge $-$1/3 quark vs charged lepton mass relation, and also a good fit to mass-mixing relations for the quark sector, as well as an attractive mixing pattern for the lepton sector, explaining a large mixing angle between ${\nu }_{\mu }$ and ${\nu }_{\tau }$, and either large or small ${\nu }_e-{\nu }_{\mu }$ mixing angle, depending on the choice of couplings, consistent with the currently accepted solutions to the solar neutrino problem.

12 pages, LaTex file, no figures

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