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

Abstract

textlessptextgreaterWe present the full textlessinline-formulatextgreatertextlessmml:math display="inline"textgreatertextlessmml:mi mathvariant="script"textgreaterOtextless/mml:mitextgreatertextlessmml:mo stretchy="false"textgreater(textless/mml:motextgreatertextlessmml:msubtextgreatertextlessmml:mitextgreaterαtextless/mml:mitextgreatertextlessmml:mitextgreaterstextless/mml:mitextgreatertextless/mml:msubtextgreatertextlessmml:mo stretchy="false"textgreater)textless/mml:motextgreatertextless/mml:mathtextgreatertextless/inline-formulatextgreater supersymmetric QCD corrections for stop-antistop annihilation into electroweak final states within the Minimal Supersymmetric Standard Model. 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.textless/ptextgreater

Publication
Phys.Rev.

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