Assuming a horizontal symmetry SUF(n), we demonstrate a possibility that the left-handed neutrinos receive masses of order 1eV, which is consistent with recent experiments on neutrino oscillations. The smallness of the neutrino masses is an indication of a large breaking of the horizontal symmetry.
Nucleon Decay in Supergrand Unification Toshiaki Kaneko and Tsutomu Yanagida
Comment on the Radiative Neutrino Mass Matrix with a Sterile Neutrino Yutaka Okamoto and Masaki Yasuè
Testing the See-Saw Mechanism at Collider Energies S. F. King and Tsutomu Yanagida
Flavor Symmetry and Vacuum Aligned Mass Textures Satoru Kaneko, Hideyuki Sawanaka, Takaya Shingai, Morimitsu Tanimoto and Koichi Yoshioka
Decaying Hidden Gauge Boson and the PAMELA and ATIC/PPB-BETS Anomalies Chuan-Ren Chen, Mihoko M. Nojiri, Fuminobu Takahashi and Tsutomu T. Yanagida
Cosmic-Ray Electron and Positron Excesses from Hidden Gaugino Dark Matter Satoshi Shirai, Fuminobu Takahashi and Tsutomu T. Yanagida