1303.3393 (Srinu Gollu et al.)

Charged lepton correction to tribimaximal lepton mixing and its
implications to neutrino phenomenology    [PDF]

Srinu Gollu, K. N. Deepthi, R. Mohanta

The recent results from Daya Bay and RENO reactor neutrino experiments have firmly established that the smallest reactor mixing angle $\theta_{13}$ is non-vanishing at the $5 \sigma$ level, with a relatively large value, i.e., $\theta_{13}\approx 9^{\circ}$. Using the fact that the neutrino mixing matrix can be represented as $V_{\rm PMNS}=U_l^{\dagger} U_{\nu} P_\nu$, where $U_l$ and $U_\nu$ result from the diagonalization of the charged lepton and neutrino mass matrices and $P_\nu$ is a diagonal matrix containing the Majorana phases and assuming the tri-bimaximal form for $U_\nu$, we investigate the possibility of accounting for the large reactor mixing angle due to the corrections of the charged lepton mixing matrix. The form of $U_{l}$ is assumed to be that of CKM mixing matrix of the quark sector. We find that with this modification it is possible to accommodate the large observed reactor mixing angle $\theta_{13}$. We also study the implications of such corrections on the other phenomenological observables.

View original: http://arxiv.org/abs/1303.3393