Searches for dark matter signals in simplified models at future hadron colliders

TL;DR

This paper evaluates the potential of future high-energy colliders to detect dark matter via monojet signatures within simplified vector mediator models, showing they could surpass current direct and indirect detection limits.

Contribution

It introduces a realistic simplified model framework for dark matter searches at future colliders and compares its sensitivity with existing detection methods.

Findings

Future colliders can probe significant regions of dark matter parameter space.

Collider sensitivities exceed those of direct detection for axial vector interactions.

Collider detection is more sensitive than indirect detection for vector interactions.

Abstract

We study the prospect of dark matter (DM) searches in the monojet channel at future $pp$ colliders with center-of-mass energies of 33, 50, and 100~TeV. We consider a class of simplified models in which a vector boson connecting DM particles to quarks is introduced. Comparing with studies in the effective field theory, the present framework gives more reasonable production rates and kinematics of the DM signatures. We estimate the sensitivities of future colliders with an integrated luminosity of 3 $ab^{-1}$ to the DM-induced monojet signature and show the parameter space that can be explored. The constraints from direct and indirect DM detection experiments are compared with the future collider sensitivities. We find that the future collider detection will be much more sensitive than the indirect detection for the vector interaction, and have better sensitivities than those of the direct detection by several orders of magnitude for the axial vector interaction.