Generation of WIMP Miracle-like Densities of Baryons and Dark Matter

TL;DR

This paper proposes a model that naturally links the observed baryon and dark matter densities by generating WIMP-like relic densities for both, suggesting a common origin and potential collider signatures.

Contribution

It introduces a novel model that simultaneously produces WIMP-like densities for baryons and dark matter by modifying an initial baryon asymmetry.

Findings

The model successfully explains the comparable densities of baryons and dark matter.

Production of unstable scalars at the LHC would serve as a signature of the model.

The approach provides a unified framework for baryogenesis and dark matter relic abundance.

Abstract

The observed density of dark matter is of the magnitude expected for a thermal relic weakly-interacting massive particle (WIMP). In addition, the observed baryon density is within an order of magnitude of the dark matter density. This suggests that the baryon density is physically related to a typical thermal relic WIMP dark matter density. We present a model which simultaneously generates thermal relic WIMP-like densities for both baryons and dark matter by modifying a large initial baryon asymmetry. Production of unstable scalars carrying baryon number at the LHC would be a clear signature of the model.