Implications of observed neutrinoless double beta decay

Details Implications of observed neutrinoless double beta decay Implications of observed neutrinoless double beta decay

2002-01-23

arxiv.org/abs/hep-ph/0201224v1

Mod.Phys.Lett. A16 (2001) 2469-2482

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, 2 postscript figures

Scientific paper

10.1142/S0217732301005850

Recently a positive indication of the neutrinoless double beta decay has been announced. We study the implications of this result taking into consideration earlier results on atmospheric neutrinos and solar neutrinos. We also include in our discussions the recent results from SNO and K2K. We point out that on the confidence level given for the double beta signal, the neutrino mass matrices are now highly constrained. All models predicting Dirac masses are ruled out and leptogenesis becomes a natural choice. Only the degenerate and the inverted hierarchical solutions are allowed for the three generation Majorana neutrinos. In both these cases we find that the radiative corrections destabilize the solutions and the LOW, VO and Just So solutions of the solar neutrinos are ruled out. For the four generation case only the inverted hierarchical scenario is allowed.

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