Generating extremal neutrino mixing angles with Higgs family symmetries
Abstract
The existence of maximal and minimal mixing angles in the neutrino mixing matrix motivates the search for extensions to the Standard Model that may explain these angles. A previous study (C.I.Low and R.R.Volkas, Phys.Rev.D68,033007(2003)), found that in the minimal extensions to the Standard Model which allow neutrino oscillations, discrete and unbroken lepton family symmetries only generate neutrino mixing matrices that are ruled out by experiment. The addition of two or more Higgs doublets that also transform with the family symmetry extends the number of mixing matrices that can be generated. Discrete Abelian family symmetries cannot explain the maximal atmospheric mixing, but they can ensure theta_{13}=0.Keywords
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