Scotogenic $Z_2$ or $U(1)_D$ Model of Neutrino Mass with $\Delta(27)$ Symmetry

Understand

The scotogenic model of radiative neutrino mass with $Z_2$ or $U(1)_D$ dark matter is shown to accommodate $\Delta(27)$ symmetry naturally.

• The resulting neutrino mass matrix is identical to either of two forms, one proposed in 2006, the other in 2008.
• These two structures are studied in the context of present neutrino data, with predictions of $CP$ violation and neutrinoless double beta decay.