Transverse Momentum Resummation: a Perturbative Study of Z Production at the Tevatron

G.BOZZI, S.CATANI, G.FERRERA, DANIEL DE FLORIAN, M.GRAZZINI

NUCLEAR PHYSICS B

ELSEVIER SCIENCE BV

Año: 2009 vol. 815 p. 174 - 179

0550-3213

We consider transverse-momentum (qT) resummation for Drell–Yan lepton pair production in hadron collisions. At small values of qT, the logarithmically-enhanced QCD contributions are resummed up to next-to-leading logarithmic accuracy. At intermediate and large values of qT, 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.