Ponente
Giancarlo Ferrera
Descripción
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 perturbative result. All perturbative terms up to order alpha_S^2 are included in our computation. We show the scale dependence of the results which allows us to estimate the corresponding perturbative uncertainty. We present a preliminary comparison with Tevatron Run II data and some illustrative results for the LHC.
