Radiative Neutrino Mass with Electroweak Scale Majorana Dark Matter in Scotogenic Model

TL;DR

This paper explores the Scotogenic model, extending the Standard Model with new particles to explain neutrino masses and dark matter, analyzing relic density, experimental constraints, and collider signatures.

Contribution

It provides a comprehensive analysis of the Scotogenic model with a focus on dark matter relic density, experimental constraints, and collider phenomenology at future lepton colliders.

Findings

The lightest right-handed neutrino can serve as dark matter consistent with relic density.

Experimental limits on neutrino oscillations and lepton flavor violation constrain the model parameters.

Predicted collider signatures could help test the model at future lepton colliders.

Abstract

Non-zero neutrino mass and dark matter cast a shadow over the success of the Standard Model (SM) of Particle Physics. The most straightforward extension of the SM to explain these two phenomena is the Scotogenic model, where the SM particle spectrum extends with three isospin singlet right-handed neutrinos and one doublet scalar while all of these being odd under $Z_2$ symmetry. In this work, we have considered the lightest right-handed neutrino as the dark matter candidate and freeze-out mechanism for producing observed dark matter relic density. The observed dark matter relic density, neutrino oscillation data and limits on the charged lepton flavor violation processes impose severe constraints on the model. After satisfying all the constraints, we study the collider signatures of the model at the proposed lepton collider experiments.