Cosmological constraints on Dark Matter models for collider searches

TL;DR

This paper examines how cosmological relic abundance measurements constrain simplified Dark Matter models with various mediators, comparing these constraints with collider and detection experiment sensitivities.

Contribution

It provides a comprehensive analysis of relic abundance constraints on Dark Matter models across mediator masses relevant for current and future colliders, including photon line search bounds.

Findings

Relic abundance constraints significantly limit mediator parameter space.

Photon line searches exclude certain pseudo-scalar mediator masses near 750 GeV.

Future 100 TeV colliders can probe regions beyond current cosmological bounds.

Abstract

Searches for Dark Matter at the LHC are commonly described in terms of simplified models with scalar, pseudo-scalar, vector and axial-vector mediators. In this work we explore the constraints imposed on such models from the observed Dark Matter relic abundance. We present these constraints over a range of mediator masses relevant for the LHC and for future, higher energy colliders. We additionally compute bounds from a photon line search for the decay of a pseudo-scalar mediator to di-photons that includes the mediator mass region near 750 GeV. Finally, we compare cosmological constraints with the reach of a possible future 100 TeV circular hadron collider, indirect, and direct detection experiments.