期刊
PHYSICS LETTERS B
卷 696, 期 3, 页码 207-213出版社
ELSEVIER
DOI: 10.1016/j.physletb.2010.12.024
关键词
QCD; hadron colliders; Transverse-momentum resummation; Drell-Van process
We consider the transverse-momentum (q(T)) distribution of Drell-Yan lepton pairs produced in hadron collisions. At small values of q(T), we resum the logarithmically-enhanced perturbative QCD contributions up to next-to-next-to-leading logarithmic accuracy. At intermediate and large values of q(T), we consistently combine resummation with the known next-to-leading order alpha(2)(s) perturbative result. All perturbative terms up to order ai are included in our computation which, after integration over q(T), reproduces the known next-to-next-to-leading order result for the Drell-Van total cross section. We show and discuss the reduction in the scale dependence of the results with respect to lower-order calculations, estimating the corresponding perturbative uncertainty. We present a preliminary comparison with Tevatron Run II data. (C) 2010 Elsevier B.V. All rights reserved.
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