QCD corrections to Minimal Dark Matter annihilations

TL;DR

This paper calculates QCD corrections to Minimal Dark Matter annihilations, showing they slightly increase the annihilation cross section and affect the required Dark Matter mass for relic abundance.

Contribution

It provides the first detailed computation of QCD corrections for various Minimal Dark Matter multiplets, refining relic abundance predictions.

Findings

QCD corrections increase annihilation cross sections by up to 2%.

The required Dark Matter mass for relic abundance is adjusted accordingly.

Corrections vary depending on the SU(2) multiplet representation.

Abstract

QCD corrections to fermionic Minimal Dark Matter annihilations increase its annihilation cross section (by 2% for a weak doublet, 1.3% for a triplet, 0.5% for a quintuplet) and thereby the Dark Matter mass required to achieve the observed cosmological relic abundance via thermal freeze-out.