Schizophrenic Neutrinos and $ν$-less Double Beta Decay

Details Schizophrenic Neutrinos and $ν$-less Double Beta Decay Schizophrenic Neutrinos and $ν$-less Double Beta Decay

2010-08-06

arxiv.org/abs/1008.1232v2

Phys.Lett.B695:181-184,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, 1 figure. Extended discussion on the pseudo-Dirac mass splitting due to loop corrections

Scientific paper

10.1016/j.physletb.2010.11.006

We point out a novel possibility for neutrinos where all neutrino flavors can be part Dirac and part Majorana. Our primary motivation for this model comes from an attempt to use supersymmetric see-saw models to tie inflation, baryon asymmetry of the Universe and dark matter to the neutrino sector. The idea however could stand on its own, with or without supersymmetry. We present a realization of this possibility within an $S_3$ family symmetry for neutrino masses, where we obtain tri-bi-maximal mixing for neutrinos to the leading order. The model predicts that for the case of inverted hierarchy, the lower limit on the neutrino mass measured in neutrinoless double beta decay experiments is about a factor of two larger than the usual case.

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