Cogenesis of visible and dark matter in a scotogenic model

TL;DR

This paper presents a scotogenic model where CP-violating decays of a heavy right-handed neutrino generate both visible matter and dark matter, aligning with neutrino data and cosmological constraints.

Contribution

It introduces a novel mechanism for simultaneous generation of visible and dark matter in a single model, consistent with neutrino and flavor observations.

Findings

Explains matter-antimatter asymmetry through neutrino decay

Produces sub-GeV dark matter via late decay of dark sector particles

Aligns dark matter relic density with cosmological observations

Abstract

Within a scotogenic neutrino mass model we explore the cogenesis of matter from the CP violating decay of a heavy $\mathbb{Z}_2$-odd right handed neutrino that simultaneously populates the visible and a multipartite dark sector. The relic density of a sub-GeV scale freeze-in dark matter is generated by the late time decay of the next-to-lightest dark particle dynamically regulated by an interplay with the thermal scattering processes. We show that this model can simultaneously explain visible matter asymmetry and provide a cosmologically viable sub-GeV dark matter while remaining in consonance with the neutrino parameters and flavour observables.