Complementarity of Galactic radio and collider data in constraining WIMP dark matter models

TL;DR

This paper compares radio synchrotron constraints with collider and indirect searches for WIMP dark matter, showing radio data can provide competitive or stronger bounds depending on astrophysical uncertainties.

Contribution

It introduces a comprehensive analysis of radio synchrotron limits on dark matter models, including effective operators and specific UV completions like Z' and Higgs portals.

Findings

Radio limits are competitive with collider bounds.

Radio data can surpass other constraints under certain astrophysical assumptions.

Constraints vary significantly with astrophysical uncertainties.

Abstract

In this work we confront dark matter models to constraints that may be derived from radio synchrotron radiation from the Galaxy, taking into account the astrophysical uncertainties and we compare these to bounds set by accelerator and complementary indirect dark matter searches. Specifically we apply our analysis to three popular particle physics models. First, a generic effective operator approach, in which case we set bounds on the corresponding mass scale, and then, two specific UV completions, the Z' and Higgs portals. We show that for many candidates, the radio synchrotron limits are competitive with the other searches, and could even give the strongest constraints (as of today) with some reasonable assumptions regarding the astrophysical uncertainties.