Tri-bimaximal neutrino mixing from discrete subgroups of SU(3) and SO(3) family symmetry

I. de Medeiros Varzielas; S. F. King; G. G. Ross

doi:10.1016/j.physletb.2006.11.015

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arXiv · hep-ph/0512313

Tri-bimaximal neutrino mixing from discrete subgroups of SU(3) and SO(3) family symmetry

I. de Medeiros Varzielas·S. F. King·G. G. Ross

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Abstract

It has recently been shown how tri-bimaximal neutrino mixing can be achieved, using the see-saw mechanism with constrained sequential dominance, through the vacuum alignment of a broken non-Abelian gauged family symmetry such as SO(3) or SU(3). Generalising the approach of Altarelli and Feruglio developed for an $A_4$ model we show how the reduction of the underlying symmetry to a discrete subgroup of SO(3) or SU(3) renders this alignment a generic property of such models. This means near tri-bimaximal mixing can be quite naturally accommodated in a complete unified theory of quark and lepton masses.

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I. de Medeiros Varzielas, S. F. King, G. G. Ross. 2005-12-23. Tri-bimaximal neutrino mixing from discrete subgroups of SU(3) and SO(3) family symmetry. https://doi.org/10.1016/j.physletb.2006.11.015

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