Testing The Standard Model With Top Quark Production (supersymmetry, Quantum Chromodynamics)

Now that the existence of the top quark is firmly established, attention turns to measuring its properties. Because of its large mass, the top quark may be sensitive to physics beyond the standard model. A promising candidate for this new physics is supersymmetry. Hence, we calculate the supersymmetric QCD correction to top-quark production at the Fermilab Tevatron, allowing for arbitrary left-right mixing of the squarks. We find that the correction is significant for several combinations of gluino and squark masses, e.g. +33 0.000000or $m\sb {\tilde g} = 200$ GeV, $m\sb{\tilde t} = m\sb{\tilde q} = 75$ GeV. Single-top-quark production at hadron colliders provides an opportunity to directly probe the charged-current weak interaction of the top quark...