Realistic model with dynamically broken symmetries

Abstract

Quark-lepton unification is achieved in a theory based on the gauged symmetry $\mathrm{SO}\mathrm{}\left(N\right)\mathrm{}\times \mathrm{SU}\mathrm{}\left(4\right)\mathrm{}\times \mathrm{S}{\mathrm{U}}_L\mathrm{}\left(2\right)\mathrm{}\times \mathrm{S}{\mathrm{U}}_R\mathrm{}\left(2\right)\mathrm{}$ ($N=6\mathrm{} \mathrm{to} 10$) with no elementary scalar fields. The dynamical breakdown produces right-handed neutrinos with ∼100-TeV Majorana masses. The model displays a potentially realistic fermion mass spectrum, reasonable neutrino masses, weak $\mathrm{CP}$ violation, the absence of strong $\mathrm{CP}$ violation, and apparently no left-over Goldstone bosons.