A new radiative neutrino mass generation mechanism with higher dimensional scalar representations and custodial symmetry

Understand

A new realization for radiative neutrino mass generation is presented.

• Based on the requirement of tree-level custodial symmetry and the introduction of higher (greater than two) dimensional representations for scalar fields, a specific scenario with a scalar septet is presented that generates neutrino Majorana masses radiatively.
• This is accomplished through an eleven dimensional operator that requires the addition of several scalar fields and a SU(2) 5-plet of new fermions, together with a Z2 that guarantees the preservation of custodial symmetry.
• The phenomenology of the setup is rather rich and includes a dark matter candidate