SUSY-QCD corrections to dark matter annihilations

TL;DR

This paper calculates full QCD and SUSY-QCD corrections to neutralino annihilation into quarks, showing significant impact on relic density predictions and SUSY parameter extraction from cosmological data.

Contribution

It provides the first comprehensive calculation of SUSY-QCD corrections to neutralino annihilation, highlighting their importance in dark matter relic density analysis.

Findings

Corrections significantly alter annihilation cross sections.

Impact on relic density calculations is substantial.

SUSY parameter constraints are affected by these corrections.

Abstract

We present full QCD and SUSY-QCD corrections to neutralino pair annihilation into quark-antiquark pairs. We show results and numerically evaluate their impact on the neutralino annihilation cross section and the relic density in scenarios with non-universal gaugino masses. By comparing to the relic density obtained from a pure leading order calculation, we demonstrate that the corrections strongly influence the extraction of SUSY mass parameters from cosmological data.