Majorana Neutrino Masses and Neutrino Oscillations

Abstract

We examine some patterns of Majorana neutrino mass matrix which is compatible with the phenomenological lepton flavor mixing matrix and non-observation of neutrinoless double beta decay. Imposing $(M_{\nu }{)}_{ee}=0$ for the Majorana neutrino mass matrix in the leading order, we obtain a relationship between the solar mixing angle and the neutrino masses $m_1$ and $m_2$. Additional possible texture zeros are assigned to the mass matrix so as for the nonvanishing ${\theta }_{13}$ to be predictable in terms of neutrino masses. We also show how three neutrino masses can be predicted from the solar mixing angle and the experimental results of $\Delta m_{sol}^2$ and $\Delta m_{atm}^2$ in this framework, and we discuss naturality of the forms of the mass matrix found in our work.

Comments: 14 pages, RevTex