Lepton Mixing from Delta (3 n^2) and Delta (6 n^2) and CP

Understand

We perform a detailed study of lepton mixing patterns arising from a scenario with three Majorana neutrinos in which a discrete flavor group Gf=Delta (3 n^2) or Gf=Delta(6 n^2) and a CP symmetry are broken to residual symmetries Ge=Z3 and Gnu=Z2 x CP in the charged lepton and neutrino sectors, respectively.

• While we consider all possible Z3 and Z2 generating elements, we focus on a certain set of CP transformations.
• The resulting lepton mixing depends on group theoretical indices and one continuous parameter.
• In order to study the mixing patterns comprehensively for all admitted Ge and Gnu, it is sufficient to discuss only three types of combinations.