XXth International Conference on Neutrino Physics and Astrophysics
Flavor mixing in quarks and leptons
We study a possibility to explain neutrino masses and mixings based on
supersymmetry. If we introduce a flavor diagonal but generation
dependent extra U(1) gauge interaction at a TeV region, we can obtain
masses and mixings of neutrinos required for the explanation of both
solar and atmospheric neutrinos. In this model, differently from the
usual bilinear $R$-parity violating scenario, the neutrino mass
degeneracy can be resolved at a tree level by the neutrino-gaugino
mixing caused by an $R$-parity violation. The model is
straightforwardly extended to include the quark sector by introducing
an anomalous U(1) which can be used for the Froggatt-Nielsen
mechanism. We also discuss the sterile neutrino model based on the
similar texture of neutrino mass matrix.
Based on Phys. Lett. B 506 (2001) 131.
Phys. Rev. D 64 (2001) 073013.
Prog. Theor. Phys. 106 (2001) 587.