1201.2747 (Asan Damanik)

Nonzero $θ_{13}$ and Neutrino Masses from Modified Neutrino Mixing
Matrix    [PDF]

Asan Damanik

The nonzero and relatively large $\theta_{13}$ have been reported by T2K, MINOS, and Double Chooz Collaborations. In order to accommodate the nonzero $\theta_{13}$, we modified the tribimaximal, bimaximal, and democratic neutrino mixing matrix. From three modified neutrino mixing matrices, only modified tribimaximal and democratic mixing matrices can produce nonzero $\theta_{13}$ which are compatible with the T2K experiment. If we use the modified neutrino mixing matrices to obtain the neutrino mass matrices and impose an additional assumption that the neutrino mass matrices have two texture zero (($M_{\nu})_{\mu\mu}=(M_{\nu})_{\tau\tau}=0$), then we obtain the neutrino mass in inverted hierarchy from modified tribimaximal neutrino mixing matrix and normal hierarchy from the modified democratic neutrino mixing matrix. Both neutrino mass matrices which are obtained from the modified tribimaximal and the democratic neutrino mixing matrices have a symmetric pattern and give $(M_{\nu})_{ee}\approx 0.0068$ eV that can be tested in the forthcoming neutrinoless double beta decay experiment.

View original: http://arxiv.org/abs/1201.2747