An extension of tribimaximal lepton mixing

Harrison, Perkins and Scott have proposed simple charged lepton and neutrino mass matrices that lead to the tribimaximal mixing U-TBM. We consider in this work an extension of the mass matrices so that the leptonic mixing matrix becomes U-PMNS = (VLUTBMW)-U-l dagger, where V-L(l) is a unitary matrix needed to diagonalize the charged lepton mass matrix and W measures the deviation of the neutrino mixing matrix from the bimaximal form. Hence, corrections to U-TBM arise from both charged lepton and neutrino sectors. Following our previous work to assume a Qin-Ma-like parametrization V-QM for the charged lepton mixing matrix V-L(l) in which the CP-odd phase is approximately maximal, we study the phenomenological implications in two different scenarios: V-L(l) = V-QM(dagger) and V-L(l) = V-QM. We find that the latter is more preferable, though both scenarios are consistent with the data within 3 sigma ranges. The predicted reactor neutrino mixing angle theta(13) in both scenarios is consistent with the recent T2K and MINOS data. The leptonic CP violation characterized by the Jarlskog invariant J is generally of order 10(-2).