Abstract

On the basis of the universal seesaw mass matrix model, which is a promising model for a unified description of the quark and lepton mass matrices, the behavior of the gauge coupling constants and intermediate energy scales in the $\mathrm{SO}{(10)}_{L}\ifmmode\times\else\texttimes\fi{}\mathrm{SO}{(10)}_{R}$ model is investigated related to the neutrino mass generation scenarios. The non-SUSY model cannot give favorable values of the intermediate energy scales to explain the smallness of the neutrino masses, while the SUSY model can give plausible values if the number ${n}_{\ensuremath{\varphi}}$ of the weak doublet Higgs scalars is ${n}_{\ensuremath{\varphi}}>~3$.

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