Collider Signatures of Higgs-portal Scalar Dark Matter

TL;DR

This paper investigates the potential to detect Higgs-portal scalar dark matter near the resonant mass at future high-energy colliders, providing estimates for required luminosities for discovery or exclusion.

Contribution

It analyzes collider signatures of scalar dark matter in the resonant mass region, extending beyond current direct detection limits with predictions for future collider sensitivities.

Findings

Luminosity estimates for 2σ exclusion and 5σ discovery at 14 TeV LHC.

Potential to probe scalar dark matter near resonance at future 100 TeV collider.

Complementary to direct detection experiments like Xenon1T.

Abstract

In the simplest Higgs-portal scalar dark matter model, the dark matter mass has been restricted to be either near the resonant mass ($m_h/2$) or in a large-mass region by the direct detection at LHC Run 1 and LUX. While the large-mass region below roughly 3 TeV can be probed by the future Xenon1T experiment, most of the resonant mass region is beyond the scope of Xenon1T. In this paper, we study the direct detection of such scalar dark matter in the narrow resonant mass region at the 14 TeV LHC and the future 100 TeV hadron collider. We show the luminosities required for the $2\sigma$ exclusion and $5\sigma$ discovery.