Keeping It Renormalizable: Minimal Baryogenesis induced Asymmetric Dark Matter

TL;DR

This paper proposes a simple, renormalizable model for asymmetric dark matter that links its asymmetry to the Standard Model Higgs, predicts observable signals at colliders, and is compatible with direct detection experiments.

Contribution

It introduces a minimal, viable scenario with only two new fields and renormalizable interactions, simplifying previous models of baryogenesis-induced asymmetric dark matter.

Findings

Model allows direct detection of dark matter in upcoming experiments.

Predicts a light inert doublet potentially observable at colliders.

Ensures the model is simple, renormalizable, and consistent with existing constraints.

Abstract

Many asymmetric dark matter scenarios have been proposed to date. Among them, perhaps the most motivated ones are those in which the dark matter asymmetry is induced from the baryon/lepton asymmetries via chemical equilibration without any new sources of CP violation. However, most of the models put forward along these lines have been excluded by now and/or are based on complicated setups. In this letter, we present a new, simple, and viable scenario. It assumes only two new fields: a scalar singlet and an inert scalar doublet, and is based only on renormalizable interactions, that slowly generate the dark matter asymmetry from the Standard Model Higgs asymmetry. The model allows for the direct detection of dark matter in the upcoming generation of experiments, and the inert doublet is predicted to be light enough to be potentially produced and observed at the LHC and future colliders, $m_{H'}<580\,{\rm GeV}$.