Degenerate and Quasi Degenerate Majorana Neutrinos

Details Degenerate and Quasi Degenerate Majorana Neutrinos Degenerate and Quasi Degenerate Majorana Neutrinos

1998-10-12

arxiv.org/abs/hep-ph/9810328v1

Phys.Rev.Lett. 82 (1999) 683-686

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages

Scientific paper

10.1103/PhysRevLett.82.683

We study mixing and CP violation of three left-handed Majorana neutrinos in the limit of exactly degenerate masses, identify the weak-basis invariant relevant for CP violation and show that the leptonic mixing matrix is parametrized only by two angles and one phase. After the lifting of the degeneracy, this parametrization accommodates the present data on atmospheric and solar neutrinos, as well as double beta decay. Some of the leptonic mixing ansatze suggested in the literature correspond to special cases of this parametrization.

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