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

TL;DR

This paper introduces a novel radiative neutrino mass generation mechanism utilizing higher-dimensional scalar representations and custodial symmetry, involving a scalar septet and new fermions, with implications for dark matter.

Contribution

It proposes a new model for neutrino mass generation using higher-dimensional scalars and custodial symmetry, featuring a scalar septet and additional fermions.

Findings

Radiative Majorana neutrino masses generated via an eleven-dimensional operator.

The model includes a dark matter candidate.

Rich phenomenology with new scalar and fermion fields.

Abstract

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