Right-handed neutrino dark matter consistent with the generation of baryon number asymmetry

TL;DR

This paper explores the potential of the lightest right-handed neutrino as a stable dark matter candidate that also explains neutrino oscillations and baryon asymmetry, within the framework of the scotogenic model.

Contribution

It investigates the viability of right-handed neutrinos as a unified solution for dark matter, neutrino masses, and baryon asymmetry using the scotogenic model's neutrino mass structure.

Findings

Right-handed neutrino can be stable dark matter candidate.

The model links neutrino mass generation with baryon asymmetry.

Compatibility with neutrino oscillation data is demonstrated.

Abstract

A right-handed neutrino is a promising candidate for dark matter (DM) which has no interaction with nuclei. Since two right-handed neutrinos explain neutrino oscillation data and baryon number asymmetry through both the seesaw mechanism and leptogenesis based on the out-of-equilibrium decay of the lighter one, the lightest third right-handed neutrino could be free from them and stable to be DM. It suggests a possibility that the right-handed neutrinos could be common key particles for the explanation of three problems in the standard model (SM). We study this possibility by analyzing the structure of a neutrino mass matrix in the scotogenic model for neutrino mass.