Leptophilic Composite Asymmetric Dark Matter and its Detection

TL;DR

This paper introduces a leptophilic composite asymmetric dark matter model that links baryon asymmetry and dark matter relic density, with potential detection prospects at future lepton colliders through displaced lepton jets.

Contribution

It presents a novel model connecting baryon asymmetry and dark matter using a scalar mediator and explores its detection prospects.

Findings

Current experiments have limited sensitivity to the model.

Future lepton colliders could detect the model via displaced lepton jets.

The model successfully explains baryon asymmetry and dark matter density.

Abstract

We propose a model which explains the baryon asymmetry of the universe and dark matter relic density at the same time. In this model, dark matter candidate is the dark baryon composed by dark quarks. A scalar mediator, which couples to the standard model leptons and dark quarks, is introduced to generate the asymmetry of baryon and dark baryon simultaneously. Direct detection and collider detection of this model are studied. We find that current underground direct detection experiments and LHC can hardly detect this model. But future lepton colliders, such as CEPC, have great potential to detect a large portion of the model parameter space by "displaced lepton jet" signal.