Neutralino annihilation to quarks with SUSY-QCD corrections

TL;DR

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

Contribution

It provides the first full QCD and SUSY-QCD correction calculations for neutralino annihilation into quarks, refining relic density estimates.

Findings

Corrections significantly alter annihilation cross sections.

Impact on supersymmetric parameter constraints from cosmology.

Enhanced precision for dark matter relic density predictions.

Abstract

The calculation of the cosmological relic density of the dark matter candidate within supersymmetric models is an interesting possibility to obtain additional constraints on the supersymmetric parameter space with respect to collider, electroweak precision, and low-energy data. Considering future cosmological precision measurements, radiative corrections can play an important role in the analysis. We present full QCD and SUSY-QCD corrections to neutralino pair annihilation into quark-antiquark pairs and analyze their impact on the neutralino annihilation cross section and the relic density. By comparing to the relic density obtained from a pure leading order calculation, we show that the corrections strongly influence the extraction of SUSY mass parameters from cosmological data.