Flavour-symmetric type-II Dirac neutrino seesaw mechanism
arXiv:1710.06498 · doi:10.1016/j.physletb.2018.02.022
Abstract
We propose a Standard Model extension with underlying A4 flavour symmetry where small Dirac neutrino masses arise from a Type-II seesaw mechanism. The model predicts the "golden" flavour-dependent bottom-tau mass relation, requires an inverted neutrino mass ordering and non-maximal atmospheric mixing angle. Using the latest neutrino oscillation global fit we derive restrictions on the oscillation parameters, such as a correlation between Dirac CP phase and the lightest neutrino mass.
10 pages, 4 figures