Group Theory and Dynamics of Neutrino Mixing

Abstract

There is a direct group-theoretical connection between neutrino mixing and horizontal symmetry that can be established without any dynamical input. Such a connection is reviewed and expanded in this article. For certain symmetry groups $\G$ including $A_4$ and $S_4$, it is shown that a generic $U(1)\x\G$ Higgs potential of a valon yields exactly the alignments dictated by the group-theoretic approach, but energy can now be used to discriminate different alignments. This mechanism possibly explains why starting from an $A_4$ group, the tribimaximal mixing matrix with an enhanced $S_4$ symmetry is more preferable than the one without it.

One footnote and one reference added. To appear in Physical Review D

References in corpus (7)

• The Unique Horizontal Symmetry of Leptons
• The Horizontal Symmetry for Neutrino Mixing
• Symmetry of Lepton Mixing
• Mass Independent Textures and Symmetry
• On the origin of neutrino flavour symmetry
• Magic Neutrino Mass Matrix and the Bjorken-Harrison-Scott Parameterization
• Three-Higgs-doublet model with $A_4$ symmetry

Cited by in corpus (1)

• Horizontal Symmetry: Bottom Up and Top Down