Speaker
Description
We update and expand on past efforts to predict the leptonic Dirac CP-violating phase with models of perturbatively modified tribimaximal mixing. Simple perturbations are applied to the tribimaximal mixing pattern in the form of rotations between two sectors. By translating these perturbed mixing matrices to the standard parameterization for the neutrino mixing matrix we derive relations between the Dirac CP-phase and the oscillation angles. We use these relations together with current experimental results to constrain the allowed range for the CP-phase and determine its probability density. Furthermore, we elaborate on the prospects for future experiments probing on the perturbations considered in this work. We present a model with $A_4$ modular symmetry that is consistent with one of the described scenarios and successfully predicts current oscillation parameter data.
