Yukawa sector in non-supersymmetric renormalizable SO(10)

Original · EN

We discuss the ordinary, non-supersymmetric SO(10) as a theory of fermion masses and mixings. We construct two minimal versions of the Yukawa sector based on 126ₕ and either 10ₕ or 120ₕ. The latter case is of particular interest since it connects the absolute neutrino mass scale with the size of the atmospheric mixing angle θₐ. It also relates the smallness of Vcb with the largeness of θₐ. These results are based on the analytic study of the second and third generations. Furthermore, we discuss the structure of the light Higgs and the role of the Peccei-Quinn symmetry for dark matter and the predictivity of the theory.