Neutrino masses and non abelian horizontal symmetries

Details Neutrino masses and non abelian horizontal symmetries Neutrino masses and non abelian horizontal symmetries

2002-07-29

arxiv.org/abs/hep-ph/0207347v2

Phys.Lett. B549 (2002) 325

Physics

High Energy Physics

High Energy Physics - Phenomenology

22 pages, 18 figures

Scientific paper

10.1016/S0370-2693(02)02904-0

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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