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

We consider transverse-momentum (q(T)) resummation for Drell-Yan lepton pair production in hadron collisions. At small values of q(T), the logarithmically-enhanced QCD contributions are resummed up to next-to-leading logarithmic accuracy. At intermediate and large values of q(T), resummation is consistently combined with the fixed-order perturbative result. We present numerical results for 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. (c) 2009 Elsevier B.V. All rights reserved.