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Supersymmetric QCD corrections to quark pair production in e+ e- annihilation

A. Djouadi·M. Drees·H. König
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Abstract

We calculate supersymmetric QCD corrections (squark/gluino loops) to quark pair production in e+ e- annihilation, allowing for mixing between left- and right-handed squarks and taking into account the effects of nonzero quark masses. Corrections to the Z boson partial widths are generally small and positive, except in the case of large b-squark mixing, where they become negative. At high-energy e+ e- colliders, larger corrections to the total cross sections are possible. Corrections to forward-backward asymmetries are negligible except possibly for top quarks, where they are sensitive to t-squark mixing. We also comment on the possibility that the gluino mass is only a few GeV.

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A. Djouadi, M. Drees, H. König. 1993-05-25. Supersymmetric QCD corrections to quark pair production in e+ e- annihilation. https://doi.org/10.1103/physrevd.48.3081

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