Perturbative QCD calculations of weak-boson production in association with jets at hadron colliders

We present perturbative QCD calculations of W, $Z+n$-jet production (n≤3) in pp̄ collisions at √s=0.63 and 1.8 TeV and also extrapolate the production cross sections to supercollider energies. The dependence of the cross sections on experimental cuts and the theoretical ambiguities are discussed in detail. It is shown that W/Z ratios of transverse-momentum distributions are quite insensitive to these uncertainties and can be predicted rather accurately. Neutrino counting and a top-quark search at large pT are addressed as applications. Our results are based on complete tree-level calculations of W, $Z+(n+2)$-parton amplitudes.