Pattern of the Approximate Mass Degeneracy of Majorana Neutrinos

Details Pattern of the Approximate Mass Degeneracy of Majorana Neutrinos Pattern of the Approximate Mass Degeneracy of Majorana Neutrinos

2002-01-23

arxiv.org/abs/hep-ph/0201225v1

Mod.Phys.Lett. A17 (2002) 289-294

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, no figure

Scientific paper

10.1142/S0217732302006412

In view of the recently reported evidence for a nonzero Majorana mass of the electron neutrino, together with the established phenomena of atmospheric and solar neutrino oscillations, the case of three nearly mass-degenerate Majorana neutrinos is now a distinct possibility. I show in this paper how a natural pattern of symmetry breaking in the recently proposed $A_4$ model of Majorana neutrino masses can accommodate the data on neutrino oscillations, resulting in the predictions $\sin^2 2 \theta_{atm} = 1$ and $\sin^2 2 \theta_{sol} = 2/3$.

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