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arXiv · hep-ph/0207347

Neutrino masses and non abelian horizontal symmetries

V. Antonelli·F. Caravaglios·R. Ferrari·M. Picariello
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Abstract

Recent neutrino experiments have made very significant progresses and our knowledge of neutrino masses and mixing has considerably improved. In a model independent Monte Carlo approach, we have examined a very large class of textures, in the context of non abelian horizontal symmetries; we have found that neutrino data select only those charged lepton matrices with left-right asymmetric texture. The large atmospheric mixing angle needs m_{23} ~= m_{33}. This result,if combined with similar recent findings for the quark sector in the B oscillations, can be interpreted as a hint for SU(5) unification. In the neutrino sector strict neutrino anarchy is disfavored by data, and at least a factor 2 of suppression in the first row and column of the neutrino majorana mass matrix is required.

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V. Antonelli, F. Caravaglios, R. Ferrari, M. Picariello. 2002-11-06. Neutrino masses and non abelian horizontal symmetries. https://doi.org/10.1016/s0370-2693(02)02904-0

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