Radiative Two Loop Inverse Seesaw and Dark Matter

TL;DR

This paper proposes two-loop inverse seesaw models that naturally generate light neutrino masses and include dark matter candidates, compatible with current experimental constraints and offering testable collider signatures.

Contribution

It introduces novel two-loop inverse seesaw models that lower the seesaw scale and incorporate dark matter, aligning with experimental data without fine tuning.

Findings

Models are consistent with Xenon100 dark matter constraints.

Neutrino masses and mixing are explained within the models.

Models predict distinctive collider and flavor physics signatures.

Abstract

Seesaw mechanism provides a natural explanation of light neutrino masses through suppression of heavy seesaw scale. In inverse seesaw models the seesaw scale can be much lower than that in the usual seesaw models. If terms inducing seesaw masses are further induced by loop corrections, the seesaw scale can be lowered to be in the range probed by experiments at the LHC without fine tuning. In this paper we construct models in which inverse seesaw neutrino masses are generated at two loop level. These models also naturally have dark matter candidates. Although the recent data from Xenon100 put stringent constraint on the models, they can be consistent with data on neutrino masses, mixing, dark matter relic density and direct detection. These models also have some interesting experimental signatures for collider and flavor physics.