Theoretical Models of Neutrino Mixing: Recent Developments

Abstract

The data on neutrino mixing are at present compatible with Tri-Bimaximal (TB) mixing. If one takes this indication seriously then the models that lead to TB mixing in first approximation are particularly interesting and A4 models are prominent in this list. However, the agreement of TB mixing with the data could still be an accident. We discuss a recent model based on S4 where Bimaximal mixing is instead valid at leading order and the large corrections needed to reproduce the data arise from the diagonalization of charged leptons. The value of ${\theta }_{13}$ could distinguish between the two alternatives.

21 pages. Talk at the 13th International Workshop on Neutrino Telescopes, Venice, March 10-13, 2009

References in corpus (26)

• Phenomenology with Massive Neutrinos
• A Simplest A4 Model for Tri-Bimaximal Neutrino Mixing
• A model for fermion masses and lepton mixing in SO(10) x A4
• Status of Oscillation plus Decay of Atmospheric and Long-Baseline Neutrinos
• Deviation from tri-bimaximal neutrino mixing in A4 flavor symmetry
• Flavor Symmetry for Quarks and Leptons
• Embedding A4 into left-right flavor symmetry: Tribimaximal neutrino mixing and fermion hierarchy
• Nonzero U_{e3}, CP violation and leptogenesis in a see-saw type softly broken A_4 symmetric model
• Fermion Mass Hierarchies and Flavor Mixing from $T^{\prime }$ Symmetry
• Neutrino mixing from the double tetrahedral group T^{\prime}
• Model of Geometric Neutrino Mixing
• Embedding the Zee-Wolfenstein neutrino mass matrix in an SO(10) x A4 GUT scenario
• Embedding A4 into SU(3)xU(1) flavor symmetry: Large neutrino mixing and fermion mass hierarchy in SO(10) GUT
• The Seesaw Mechanism in Quark-Lepton Complementarity
• Fermion Mass Hierarchies and Flavour Mixing from a Minimal Discrete Symmetry
• Neutrino mixing matrix in the 3-3-1 model with heavy leptons and $A_4$ symmetry
• Consequences of Approximate $S_3$ Symmetry of the Neutrino Mass Matrix
• Non-Abelian Discrete Family Symmetries of Leptons and Quarks
• Status of Tri/Bi-Maximal Neutrino Mixing
• Neutrino Oscillation Parameters After High Statistics KamLAND Results
• Neutrino oscillations: present status and outlook
• Mapping out SU(5) GUTs with non-Abelian discrete flavor symmetries
• Degenerate neutrinos from a supersymmetric A_4 model
• Neutrino masses and mixings with an S3 family permutation symmetry
• Model-Independent Analysis of Tri-bimaximal Mixing -- a Softly-Broken Hidden or an Accidental Symmetry?
• Group Theoretic Bases for Tribimaximal Mixing