Interplay of gaugino (co)annihilation processes in the context of a precise relic density calculation

TL;DR

This paper calculates precise quantum corrections to key annihilation processes in the MSSM to improve dark matter relic density predictions, matching the accuracy of recent Planck measurements.

Contribution

It provides the full $ ext{O}( ext{α}_s)$ corrections to annihilation and coannihilation processes, enhancing theoretical precision in relic density calculations.

Findings

Radiative corrections significantly affect relic density predictions.

The impact exceeds the experimental uncertainty of Planck data.

Improves the theoretical accuracy of dark matter relic density estimates.

Abstract

The latest Planck data allow one to determine the dark matter relic density with previously unparalleled precision. In order to achieve a comparable precision on the theory side, we have calculated the full $\mathcal{O}(\alpha_s)$ corrections to the most relevant annihilation and coannihilation processes for relic density calculations within the Minimal Supersymmetric Standard Model (MSSM). The interplay of these processes is discussed. The impact of the radiative corrections on the resulting relic density is found to be larger than the experimental uncertainty of the Planck data.