Investigation of spin-dependent dark matter in mono-photon production at high-energy colliders

TL;DR

This study explores how spin-dependent dark matter particles could be produced in high-energy colliders via mono-photon signals, analyzing their interactions and compatibility with astrophysical relic density constraints.

Contribution

It introduces a detailed analysis of scalar and fermion dark matter production through a new vector mediator near resonance, linking collider signals with relic density calculations.

Findings

Certain dark matter mass and coupling ranges align with relic density constraints.

Collider and astrophysical limits do not exclude these dark matter parameter spaces.

Mono-photon production can serve as a probe for spin-dependent dark matter interactions.

Abstract

Many theories about dark matter have emerged due to its strong theoretical appeal in explaining astrophysical phenomena. However, experimental and theoretical particle physics have yet not provided evidence that dark matter is part of the observable Universe. Our work aims to investigate the interaction between Standard Model (SM) fermions and different species of dark matter (DM) particles in high-energy collisions through interaction of a new massive vector mediator, Z'. The production of scalar and fermion DM pairs via fermion annihilation into the new vector boson is investigated near a resonance, where a SM signal from hard photon emission is considered as initial state radiation, namely a mono-photon production. Values of coupling constants between the DM and the SM particles are mapped in contrast to the Planck satellite data for thermal relic density DM computed in the correct framework for the relic density near a resonance, where a weaker suppression of the relic density is expected. We show for the CLIC and LHC kinematic regimes that certain mass ranges and coupling constants of these DM particles are in agreement with the expected relic density near a resonance and are not excluded by collider and astrophysical limits.