Minimal seesaw model with S_4 flavor symmetry

Details Minimal seesaw model with S_4 flavor symmetry Minimal seesaw model with S_4 flavor symmetry

2011-04-03

arxiv.org/abs/1104.0380v2

Phys.Lett.B700:316-321,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, 4 figures; version to appear in PLB

Scientific paper

10.1016/j.physletb.2011.05.014

We discuss a neutrino mass model based on the S_4 flavor symmetry within the minimal seesaw framework, in which only two right-handed neutrinos are introduced and transform as 2 under S_4. Although the model contains less free parameters compared to the typical seesaw models, it provides a successful description of the observed neutrino parameters, and in particular, a nearly tri-bimaximal mixing pattern can be naturally accommodated. In addition, the heavy right-handed neutrino masses are found to be non-degenerate, while only the normal hierarchical mass spectrum is compatible with experiments for light neutrinos.

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