Long-lived particle phenomenology in one-loop neutrino mass models with dark matter

TL;DR

This paper investigates a dark matter-neutrino mass model with a triplet scalar, focusing on its phenomenology, relic density, experimental constraints, and potential signals at the LHC, highlighting the presence of long-lived particles.

Contribution

It analyzes a specific 1-loop neutrino mass model with dark matter, exploring its parameter space and collider signatures, including reinterpretation of existing LHC searches.

Findings

Allowed parameter space includes long-lived doubly charged scalars.

Existing LHC searches constrain scalar masses.

Future LHC sensitivity estimates are provided.

Abstract

Neutrino masses and dark matter (DM) might have a common origin. The scotogenic model can be considered the proto-type model realizing this idea, but many other variants exist. In this paper we explore the phenomemology of a particular DM neutrino mass model, containing a triplet scalar. We calculate the relic density and check for constraints from direct detection experiments. The parameter space of the model, allowed by these constraints, contains typically a long-lived or quasi-stable doubly charged scalar, that can be searched for at the LHC. We reinterpret existing searches to derive limits on the masses of the scalars of the model and estimate future sensitivities in the high-luminosity phase of the LHC. The searches we discuss can serve to constrain also many other 1-loop neutrino mass models.