The T2K Collaboration has recently reported a remarkable indication of the υμ＋ υe oscillation which is consistent with a relatively large value of θ13 in the three-flavor neutrino mixing scheme. We show that it ...The T2K Collaboration has recently reported a remarkable indication of the υμ＋ υe oscillation which is consistent with a relatively large value of θ13 in the three-flavor neutrino mixing scheme. We show that it is possible to account for such a result of θ13 by introducing a natural perturbation to the democratic neutrino mixing pattern, without or with CP violation. A testable correlation between θ13 and θ23 is predicted in this ansatz. We also discuss the Wolfenstein-like parametrization of neutrino mixing, and comment on other possibilities of generating sufficiently large θ13 at the electroweak scale.展开更多
基金Supported by National Natural Science Foundation of China (11135009)
文摘The T2K Collaboration has recently reported a remarkable indication of the υμ＋ υe oscillation which is consistent with a relatively large value of θ13 in the three-flavor neutrino mixing scheme. We show that it is possible to account for such a result of θ13 by introducing a natural perturbation to the democratic neutrino mixing pattern, without or with CP violation. A testable correlation between θ13 and θ23 is predicted in this ansatz. We also discuss the Wolfenstein-like parametrization of neutrino mixing, and comment on other possibilities of generating sufficiently large θ13 at the electroweak scale.
