Predicting quark and lepton masses and mixings

A model is presented that fits the quark and lepton masses and mixings wherein five dimensionless parameters and a phase account for fifteen dimensionless observables. Among these are the Wolfenstein parameters $ρ$ and $η$, the $ν_e-ν_μ$ and $ν_e-ν_τ$ mixing angles which are predicted to be small and comparable while the $ν_μ-ν_τ$ mixing angle is predicted to be large. The model is based on supersymmetric SO(10) with the form of the mass matrices motivated by simplicity at the level of grand unification.

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