XXth International Conference on Neutrino Physics and Astrophysics

Poster Abstract


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.

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