Effect of SUSY-QCD corrections to neutralino annihilation on the cold dark matter relic density in the Higgs funnel

TL;DR

This paper calculates SUSY-QCD corrections to neutralino annihilation into bottom quarks via a pseudoscalar Higgs, analyzing their impact on dark matter relic density predictions in the Higgs funnel region.

Contribution

It provides the first complete calculation of SUSY-QCD corrections to this annihilation process and assesses their effect on cosmological dark matter density.

Findings

SUSY-QCD corrections significantly alter annihilation cross sections.

Corrections impact the predicted relic density in the Higgs funnel region.

Results align with recent cosmological observations.

Abstract

We present a complete calculation of the QCD and SUSY-QCD corrections to neutralino pair annihilation into bottom quark-antiquark pairs through exchange of a pseudoscalar Higgs boson, which is the dominant process in the cosmological A-funnel region of the mSUGRA model. We present numerical predictions for the annihilation cross section and discuss the influence of the correction terms on the cold dark matter relic density with respect to recent cosmological data.