Low-scale leptogenesis and dark matter in a three-loop radiative seesaw model

TL;DR

This paper presents a three-loop radiative seesaw model that simultaneously explains neutrino mass, dark matter, and baryon asymmetry, proposing a four right-handed neutrino scenario with testable collider predictions.

Contribution

It introduces a novel four-neutrino framework within a three-loop seesaw model to address key cosmological and particle physics questions simultaneously.

Findings

Successful leptogenesis achieved with four right-handed neutrinos.

Predicts a light sleptonlike particle accessible to future colliders.

Provides a unified explanation for neutrino mass, dark matter, and baryon asymmetry.

Abstract

We show that three open questions in particle physics and cosmology: the origin of neutrino mass, the identity of dark matter, and the origin of the baryon asymmetry of the universe can be explained simultaneously in the three-loop seesaw model proposed by Krauss, Nasri, and Trodden. We discuss the difficulty of successful leptogenesis with three right-handed neutrinos, and we propose a scenario with four right-handed neutrinos that satisfies all observational constraints. This scenario predicts a sleptonlike particle as light as a few hundreds GeV that can be probed by future collider experiments.