Universal Seesaw Mass Matrix Model with an S 3 Symmetry

Stimulated by the phenomenological success of the universal seesaw mass matrix model, where the mass terms for quarks and leptons fi (i = 1, 2, 3) and hypothetical super-heavy fermions Fi are given by fLmLFR +FLmRfR + FLMFFR + h.c. and the form of MF is democratic on the bases on which mL and mR are diagonal, the following model is discussed: The mass terms MF are invariant under the permutation symmetry S3, and the mass terms mL and mR are generated by breaking the S3 symmetry spontaneously. The model leads to an interesting relation for the charged lepton masses.