CP Violation from Flavor Symmetry in a Lepton Quarticity Dark Matter Model

Abstract

We propose a simple $\Delta (27)\otimes Z_4$ model where neutrinos are predicted to be Dirac fermions. The smallness of their masses follows from a type-I seesaw mechanism and the leptonic CP violating phase correlates with the pattern of $\Delta (27)$ flavor symmetry breaking. The scheme naturally harbors a WIMP dark matter candidate associated to the Dirac nature of neutrinos, in that the same $Z_4$ lepton number symmetry also ensures dark matter stability.

16 pages, 5 figures, Dark Matter Direct Detection Constraints Updated, Conclusions Unchanged, Published Version

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