Collider Detection of Dark Matter Electromagnetic Anapole Moments

TL;DR

This paper explores the potential for collider experiments, specifically the high-luminosity LHC, to detect Majorana dark matter interacting via anapole moments, comparing results with direct detection methods.

Contribution

It provides a collider-based analysis of Majorana dark matter with anapole interactions, including systematic uncertainties and comparison with direct detection experiments.

Findings

Collider reach surpasses direct detection in certain parameter regions.

Systematic uncertainties significantly affect detection prospects.

Application to leptophilic dark matter models demonstrates broader relevance.

Abstract

Dark matter that interacts with the Standard Model by exchanging photons through higher multipole interactions occurs in a wide range of both strongly as well as weakly coupled hidden sector models. We study the collider detection prospects of these candidates, with a focus on Majorana dark matter that couples through the anapole moment. The study is conducted at the effective field theory level with the mono-$Z$ signature incorporating varying levels of systematic uncertainties at the high-luminosity LHC. The projected collider reach on the anapole moment is then compared to the reach coming from direct detection experiments like LZ. Finally, the analysis is applied to a weakly coupled completion with leptophilic dark matter.