Unified Explanation of Quark and Lepton Masses and Mixings in the Supersymmetric SO(10) Model

Kin-ya Oda, Eiichi Takasugi, Minoru Tanaka, Masaki Yoshimura

Published 1998-08-06Version 1

We discussed neutrino masses and mixings in SUSY SO(10) model where quarks and leptons have Yukawa couplings to at least two 10 and one $\bar{126}$ Higgs scalars. In this model, the Dirac and the right-handed Majorana mass terms are expressed by linear combinations of quark and charged lepton mass matrices, which then determine the neutrino mass matrix by the see-saw mechanism. We show that there are various solutions to reproduce a large mixing angle for $\nu_\mu-\nu_\tau$ and a small mixing angle for $\nu_e-\nu_\mu$, as well as the hierarchical mass spectrum of neutrinos.