Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2005-12-23
Phys.Lett.B644:153-157,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
10 pages, Latex
Scientific paper
10.1016/j.physletb.2006.11.015
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.
King Stephen F.
Medeiros Varzielas Ivo de
Ross Graham G.
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