Supersymmetric QCD corrections to quark pair production ine+e−annihilation

We calculate supersymmetric QCD corrections (squark and 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 $\tilde{b}$ 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 $\tilde{t}$ squark mixing. We also comment on the possibility that the gluino mass is only a few GeV.