Degenerate neutrino mass models revisited

Details Degenerate neutrino mass models revisited Degenerate neutrino mass models revisited

2009-11-08

arxiv.org/abs/0911.1488v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, 2 figures, 2 tables

Scientific paper

A parametrisation of the degenerate neutrino mass matrix obeying $\mu -\tau$ symmetry, is introduced for detailed numerical analysis. As a continuation of our earlier work on normal and inverted hierarchical models, the present parametrisation for degenerate models has the ability to lower the solar mixing angle below the tri-bimaximal value $\tan^{2}\theta_{12}=0.5$, while maintaining the condition of maximal atmospheric mixing angle and zero reactor angle. The combined data on the mass-squared differences derived from various oscillation experiments, and also from the bounds on absolute neutrino masses in $0\nu\beta\beta$ decay and cosmology, gives certain constraints on the validity of the degenerate models.

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