Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-02-09
Phys.Rev. D73 (2006) 053003
Physics
High Energy Physics
High Energy Physics - Phenomenology
20 pages, 3 figures, extended version of hep-ph/0510272 to include analysis of finite, small \theta_{13}
Scientific paper
10.1103/PhysRevD.73.053003
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 $\theta_{13}$ mixing angle in normal and inverse mass hierarchies. For normal hierarchy and both zero and finite $\theta_{13}$ 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 $\theta_{13}=0$ no texture zeros nor any such equalities can exist apart from the obvious ones. For $\theta_{13}\ne 0$ some texture zeros become possible. In normal hierarchy two texture zeros occur if $8.1\times 10^{-2}\leq |sin \theta_{13}|\leq 9.1\times 10^{-2}$ while in inverse hierarchy three are possible, one with $|sin \theta_{13}|\geq 7\times 10^{-3}$ and two others with $|sin \theta_{13}|\geq 0.18$. All equalities between mass matrix elements are impossible with $\theta_{13}\ne 0$.
Chauhan Bhag C.
Picariello Marco
Pulido Joao
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