Dark Matter candidates in a Type-II radiative neutrino mass model

TL;DR

This paper presents a model linking dark matter and neutrino masses via radiative mechanisms, introducing new particles and symmetries, and analyzing detection prospects for dark matter candidates in the 700 GeV to 30 TeV range.

Contribution

It proposes a novel radiative Type-II seesaw model with a stable dark matter candidate and explores its phenomenology and detection prospects.

Findings

Neutrino masses and flavor structure are consistent with observations.

Dark matter relic density is achieved for masses between 700 GeV and 30 TeV.

Detection prospects are promising for CTA, Darwin, and KM3Net.

Abstract

We explore the connection between Dark Matter and neutrinos in a model inspired by radiative Type-II seessaw and scotogenic scenarios. In our model, we introduce new electroweakly charged states (scalars and a vector-like fermion) and impose a discrete $\mathbb{Z}_2$ symmetry. Neutrino masses are generated at the loop level and the lightest $\mathbb{Z}_2$-odd neutral particle is stable and it can play the role of a Dark Matter candidate. We perform a numerical analysis of the model showing that neutrino masses and flavour structure can be reproduced in addition to the correct dark matter density, with viable DM masses from 700 GeV to 30 TeV. We explore direct and indirect detection signatures and show interesting detection prospects by CTA, Darwin and KM3Net and highlight the complementarity between these observables.