Family Hierarchy and Large Neutrino Mixings

Abstract

The recent neutrino data seem to favor two large and one small mixing angles and a hierarchy of their squared mass differences. We discuss these within the context of hierarchical neutrino masses. We show that this scheme suggests a specific neutrino mass matrix with mild fine-tuning. We then present a Froggatt-Nielsen model that reproduces this matrix.

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• tau -> mu gamma and mu -> e gamma as probes of neutrino mass models
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• E_6 Unification with Bi-Large Neutrino Mixing
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• Towards a Complete Theory of Fermion Masses and Mixings with SO(3) Family Symmetry and 5d SO(10) Unification
• Anomalous Flavor U(1)_X for Everything
• U(e3) from physics above the GUT scale
• Yukawa Textures and the mu-term
• Neutrino Mass Models
• Family Hierarchy from Symmetry Breaking
• Fermion Mass Hierarchy in Lifshitz Type Gauge Theory
• Neutrino masses and mixing from hierarchy and symmetry
• Dirac CP phase in the neutrino mixing matrix and the Froggatt-Nielsen mechanism with $\mathbf{det}[{\mathbf{M}}_{\nu }]=0$
• Neutrino Masses, Mixing and New Physics Effects
• Discrete symmetries and neutrino masses
• Neutrino masses and the Cabibbo expansion