SUSY-QCD corrections to stop annihilation into electroweak final states including Coulomb enhancement effects

Abstract

We present the full $\mathcal{O}({\alpha }_s)$ supersymmetric QCD corrections for stop-anti-stop annihilation into electroweak final states within the Minimal Supersymmetric Standard Model (MSSM). We also incorporate Coulomb corrections due to gluon exchange between the incoming stops. Numerical results for the annihilation cross sections and the predicted neutralino relic density are presented. We show that the impact of the radiative corrections on the cosmologically preferred region of the parameter space can become larger than the current experimental uncertainty, shifting the relic bands within the considered regions of the parameter space by up to a few tens of GeV.

20 pages, 13 figures, updated to version published in Phys. Rev. D

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Cited by in corpus (6)

• Anatomy of Coannihilation with a Scalar Top Partner
• On thermal corrections to near-threshold annihilation
• Higgs-mediated bound states in dark-matter models
• SUSY-QCD corrections for the direct detection of neutralino dark matter and correlations with the relic density
• Squark-pair annihilation into quarks at next-to-leading order
• Stop Co-Annihilation in the Minimal Supersymmetric Standard Model Revisited