Transverse-momentum resummation: A perturbative study of Z production at the Tevatron

We consider transverse-momentum (qTqT) resummation for Drell–Yan lepton pair production in hadron collisions. At small values of qTqT, the logarithmically-enhanced QCD contributions are resummed up to next-to-leading logarithmic accuracy. At intermediate and large values of qTqT, resummation is consistently combined with the fixed-order perturbative result. We present numerical results for e+e−e+e− pairs from the decay of Z bosons produced at Tevatron energies. We perform a detailed study of the scale dependence of the results to estimate the corresponding perturbative uncertainty. We comment on the comparison with the available Tevatron data.