Light asymmetric dark matter from new strong dynamics

TL;DR

This paper proposes a new strong dynamics model for light asymmetric dark matter, specifically a 5 GeV dark baryon, which can share the baryon asymmetry and is detectable in underground experiments.

Contribution

It introduces a novel mechanism for generating light asymmetric dark matter via dynamical electroweak symmetry breaking with shared baryon asymmetry.

Findings

Dark baryon mass around 5 GeV consistent with relic density

Shared asymmetry via sphaleron interactions without electroweak charges

Predicted scattering cross-section within experimental reach

Abstract

A ~5 GeV `dark baryon' with a cosmic asymmetry similar to that of baryons is a natural candidate for the dark matter. We study the possibility of generating such a state through dynamical electroweak symmetry breaking, and show that it can share the relic baryon asymmetry via sphaleron interactions, even though it has no electroweak interactions. The scattering cross-section on nucleons, estimated in analogy to QCD, is within reach of underground direct detection experiments.