Probing Inelastic Dark Matter at the LHC, FASER and STCF

TL;DR

This paper investigates the potential to detect inelastic dark matter with an additional U(1)D gauge symmetry at various colliders, focusing on distinctive signatures like displaced muon-jets and mono-photon events, covering a wide mass range.

Contribution

It introduces collider search strategies for inelastic dark matter with a new gauge symmetry, highlighting the detection prospects across multiple experiments.

Findings

Inelastic DM with masses from 1 MeV to 210 GeV can be probed.

Distinctive signatures include displaced muon-jets and mono-photon events.

Collider experiments can effectively test this DM model.

Abstract

In this work, we explore the potential of probing the inelastic dark matter (DM) model with an extra U(1)D gauge symmetry at the Large Hadron Collider, ForwArd Search ExpeRiment and Super Tau Charm Factory. To saturate the observed DM relic density, the mass splitting between two light dark states has to be small enough, and thus leads to some distinctive signatures at these colliders. By searching for the long-lived particle, the displaced muon-jets, the soft leptons, and the mono-photon events, we find that the inelastic DM mass in the range of 1 MeV to 210 GeV could be tested.