Neutrino Mass Matrices With Vanishing Determinant

Chauhan, Bhag C.; Pulido, Joao; Picariello, Marco

Neutrino Mass Matrices With Vanishing Determinant

Authors

Chauhan, Bhag C.

Pulido, Joao

Picariello, Marco

Description

We investigate the prospects for neutrinoless double beta decay, texture zeros and equalities between neutrino mass matrix elements in scenarios with vanishing determinant mass matrices for vanishing and finite $θ_{13}$ mixing angle in normal and inverse mass hierarchies. For normal hierarchy and both zero and finite $θ_{13}$ it is found that neutrinoless double beta decay cannot be observed by any of the present or next generation experiments, while for inverse hierarchy it is, on the contrary, accessible to experiments. Regarding texture zeros and equalities between mass matrix elements, we find that in both normal and inverse hierarchies with $θ_{13}=0$ no texture zeros nor any such equalities can exist apart from the obvious ones. For $θ_{13}\ne 0$ some texture zeros become possible. In normal hierarchy two texture zeros occur if $8.1\times 10^{-2}\leq |sin θ_{13}|\leq 9.1\times 10^{-2}$ while in inverse hierarchy three are possible, one with $|sin θ_{13}|\geq 7\times 10^{-3}$ and two others with $|sin θ_{13}|\geq 0.18$. All equalities between mass matrix elements are impossible with $θ_{13}\ne 0$.
20 pages, 3 figures, extended version of hep-ph/0510272 to include analysis of finite, small θ_{13}