par Dreiner, Herbi H.K.;Moreau, Grégory
Référence Physical Review D - Particles, Fields, Gravitation and Cosmology, 67, 5, 055005
Publication Publié, 2003
Article révisé par les pairs
Résumé : We present a study of a three neutrino flavor transition model based on supersymmetric interactions that violate R parity. These interactions induce flavor violating scattering reactions between solar matter and neutrinos. The model does not contain any vacuum mass or mixing angle for the first generation neutrino. Instead, the effective mixing in the first generation is induced via the new interactions. The model provides a natural interpretation of the atmospheric neutrino anomaly, and is consistent with reactor experiments. We determine all R-parity violating couplings which can contribute to the effective neutrino oscillations, and summarize the present laboratory bounds. Independent of the specific nature of the (supersymmetric) flavor violating model, the experimental data on the solar neutrino rates and the recoil electron energy spectrum are inconsistent with the theoretical predictions. The confidence level of the x2 analysis ranges between ∼ 10-4 and ∼10-3. The incompatibility arises because we cannot simultaneously accommodate the new SNO results together with the recoil electron energy spectrum from Super-Kamiokande in our model. We conclude that a nonvanishing vacuum mixing angle for the first generation neutrino is necessary in our model. We expect this also to apply to the solutions based on other flavor violating interactions having constraints of the same order of magnitude. © 2003 The American Physical Society.