Cabibbo current and t-quark mass in a six-quark gauge model

Abstract

In the six-quark model with the gauge group $SU(2)_L\times{SU}(2)_R\times{U}(1)$, and left-right symmery, we obtain four physically acceptable mass matrices which are different from the ones known so far by imposing the specific conditions for the coupling constants of a quark-Higgsboson Yukawa interaction on the assumption that the interaction is invariant under the most general discrete transformation. However, only the two of these mass matrices are possible from the recent result of the lift-time experiments on the b-quark. The extented Cabibbo current with CP-violation is expressed in terms of quark mass ratios and phases in the quark mass matrices. It is predicted that t-quark mass is order of 50 Gev and an upper limit for T-neutrino mass is 9 MeV.