Paper
Vector boson production at hadron colliders: transverse-momentum resummation and leptonic decay
Authors
Stefano Catani, Daniel de Florian, Giancarlo Ferrera, Massimiliano Grazzini
Abstract
We consider the transverse-momentum () distribution of Drell-Yan lepton pairs produced, via and decay, in hadronic collisions. At small values of , we resum the logarithmically-enhanced perturbative QCD contributions up to next-to-next-to-leading logarithmic accuracy. Resummed results are consistently combined with the known fixed-order results at intermediate and large values of . Our calculation includes the leptonic decay of the vector boson with the corresponding spin correlations, the finite-width effects and the full dependence on the final-state lepton(s) kinematics. The computation is encoded in the numerical program DYRes, which allows the user to apply arbitrary kinematical cuts on the final-state leptons and to compute the corresponding distributions in the form of bin histograms. We present a comparison of our results with some of the available LHC data. The inclusion of the leptonic decay in the resummed calculation requires a theoretical discussion on the recoil due to the transverse momentum of the produced vector boson. We present a recoil procedure that is directly applicable to resummed calculations for generic production processes of high-mass systems in hadron collisions.