Key points are not available for this paper at this time.
A universal seesaw mechanism is invoked to account for the observed fermion mass hierarchies. In the framework of left-right symmetry, heavy fermions (mass scale) which are SU (2) ₋SU (2) ₑ singlets are postulated while retaining the simplest possible Higgs system: namely, (1, 2, 1) +₁ (1, 1, 2) +₁ accompanied by a left-right singlet (1, 1, 1) ₀ in the standard SU (3) ₂SU (2) ₋SU (2) ₑU (1) ₁-₋ notation. Every conventional quark and lepton is accompanied by a nonmirror singlet heavy fermion, so that the associated mass matrix is doubled and has the seesaw form usually associated only with the neutrino mass matrix. In the single-generation case, the model provides a plausible explanation for the mass hierarchy m₄, ₔ, ₃10^-4Mₖ and predicts m₄mₑm₄^2, thus accounting for the superlightness of neutrinos. Combined with a U (1) axial symmetry, the mechanism provides a formalism in which the generations are distinguished and constraints emerge on the allowed form of mass matrices. In this paper, we consider the realistic case of three generations in a simplified version of the model in which CP violation does not arise from the gauge sector. Choosing the U (1) ₀ quantum numbers so that the mass matrices are of the Fritzsch type, we calculate experimentally measured Cabibbo-Kobayashi-Maskawa matrix elements Vₔₒ, Vₔ₁, and V₂ₒ and derive their dependence on quark mass parameters. An interesting correlation between Vₔₒ which measures the Cabibbo angle and Vₔ₁ which measures the charmless decay of the b quark emerges from the model. Vₔ₁ is naturally suppressed if Vₔₒ=d{s}-u{c} to a very good approximation.
Davidson et al. (Mon,) studied this question.