ar X iv : 1 30 4 . 34 68 v 2 [ he p - ph ] 4 J ul 2 01 3 Neutrino masses and mixing in A 4 models with three Higgs doublets
نویسنده
چکیده
We study neutrino masses and mixing in the context of flavor models with A4 symmetry, three scalar doublets in the triplet representation, and three lepton families. We show that there is no representation assignment that yields a dimension-5 mass operator consistent with experiment. We then consider a type-I seesaw with three heavy right-handed neutrinos, explaining in detail why it fails, and allowing us to show that agreement with the present neutrino oscillation data can be recovered with the inclusion of dimension-3 heavy neutrino mass terms that break softly the A4 symmetry.
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تاریخ انتشار 2013