Bilarge leptonic mixing from Abelian horizontal symmetries

Abstract

We construct and present a model for leptonic mixing based on higher-dimensional operators, using the Froggatt-Nielsen mechanism, and Abelian horizontal symmetries (flavor symmetries) of continuous and discrete type. Our model naturally yields bilarge leptonic mixing, coming from both the charged leptons and the neutrinos, and an inverted neutrino mass hierarchy spectrum. The obtained values of the parameters, i.e., the leptonic mixing parameters and the neutrino mass squared differences, are all consistent with the atmospheric neutrino data and the Mikheyev-Smirnov-Wolfenstein large mixing angle solution for the solar neutrino problem.

9 pages, 2 figures, LaTeX. Final version to be published in Phys. Lett. B

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• A discrete symmetry group for maximal atmospheric neutrino mixing
• Models of Neutrino Masses and Mixings
• Higgs Potential in Minimal S_3 Invariant Extension of the Standard Model
• A Flavor Symmetry Model for Bilarge Leptonic Mixing and the Lepton Masses
• S_3 Flavor Symmetry and Leptogenesis
• Hierarchical Neutrino Mass Matrices, CP violation and Leptogenesis
• Constraints on Flavor Neutrino Masses and sin^2(2theta_{12})>>sin^2(theta_{13}) in Neutrino Oscillations
• Double Suppression of FCNCs in Supersymmetric Models
• Non-Zero ${\theta }_{13}$ and ${\delta }_{CP}$ in a Neutrino Mass Model with $A_4$ Symmetry