Admixture of quasi-Dirac and Majorana neutrinos with tri-bimaximal mixing

Details Admixture of quasi-Dirac and Majorana neutrinos with tri-bimaximal mixing Admixture of quasi-Dirac and Majorana neutrinos with tri-bimaximal mixing

2011-04-26

arxiv.org/abs/1104.4961v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, minor changes to match version accepted in PLB

Scientific paper

We propose a realization of the so-called bimodal/schizophrenic model proposed recently. We assume S4, the permutation group of four objects as flavor symmetry giving tri-bimaximal lepton mixing at leading order. In these models the second massive neutrino state is assumed quasi-Dirac and the remaining neutrinos are Majorana states. In the case of inverse mass hierarchy, the lower bound on the neutrinoless double beta decay parameter m_ee is about two times that of the usual lower bound, within the range of sensitivity of the next generation of experiments.

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