Impact of Dark Matter Direct and Indirect Detection on Simplified Dark Matter Models

TL;DR

This paper examines how current direct and indirect dark matter detection experiments constrain simplified fermionic dark matter models with a Z' mediator, highlighting significant exclusions of parameter space.

Contribution

It provides a comprehensive analysis of the impact of detection limits on simplified dark matter models, especially considering the Galactic Center gamma-ray excess.

Findings

Large portions of parameter space are excluded by current detection limits.

The combination of direct and indirect detection data constrains models with thermal WIMPs.

The Galactic Center gamma-ray excess further restricts viable model parameters.

Abstract

We discuss simple extensions of the Standard Model featuring a (fermionic) stable DM candidate interacting with SM fermions through a $Z^{'}$ mediator. These kind of models offer a wide phenomenology but result, at the same time, particularly manageable, given the limited number of free-parameters, and offer a broad LHC phenomenology. We will discuss the impact Direct and Indirect Dark Matter searches, assuming the latter to be thermal WIMPs. We will show in particular that the combinations of the limits on the DM Spin Independent and Spin Dependent scattering cross-section on nuclei already exclude large portions of the parameter space favored by DM relic density, in particular if, in addition, a DM Indirect signal, like the Galactic Center gamma-ray excess is required.