The Scale-Invariant Scotogenic Model

TL;DR

This paper presents a scale-invariant scotogenic model that explains neutrino masses and dark matter, predicts a singlet scalar, and analyzes experimental constraints to identify viable parameter regions.

Contribution

It introduces a minimal scale-invariant implementation of the scotogenic model that successfully accounts for electroweak symmetry breaking, neutrino masses, and dark matter.

Findings

Viable dark matter masses below 10 GeV and above 200 GeV.

Constraints from lepton flavor violation and dark matter detection are significant.

Model predicts a singlet scalar (dilaton) responsible for symmetry breaking and lepton number violation.

Abstract

We investigate a minimal scale-invariant implementation of the scotogenic model and show that viable electroweak symmetry breaking can occur while simultaneously generating one-loop neutrino masses and the dark matter relic abundance. The model predicts the existence of a singlet scalar (dilaton) that plays the dual roles of triggering electroweak symmetry breaking and sourcing lepton number violation. Important constraints are studied, including those from lepton flavor violating effects and dark matter direct-detection experiments. The latter turn out to be somewhat severe, already excluding large regions of parameter space. None the less, viable regions of parameter space are found, corresponding to dark matter masses below (roughly) 10 GeV and above 200 GeV.