1206.7072 (P. M. Ferreira et al.)

Maximal CP violation in lepton mixing from a model with Delta(27)
flavour symmetry    [PDF]

P. M. Ferreira, W. Grimus, L. Lavoura, P. O. Ludl

We propose a simple mechanism which enforces |U_{mu j}| = | U_{tau j}| forall j = 1,2,3 in the lepton mixing matrix U. This implies maximal atmospheric neutrino mixing and a maximal CP-violating phase but does not constrain the reactor mixing angle theta_{13}. We implement the proposed mechanism in two renormalizable seesaw models which have features strongly resembling those of models based on a flavour symmetry group Delta(27). Among the predictions of the models, there is a determination, although ambiguous, of the absolute neutrino mass scale, and a stringent correlation between the absolute neutrino mass scale and the effective Majorana mass in neutrinoless double-beta decay.

View original: http://arxiv.org/abs/1206.7072