Role of the nonperturbative input in QCD resummed Drell-Yan $Q_T$-distributions

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dc.creatorQiu, Jianwei
dc.creatorZhang, Xiaofei
dc.date2000-12-27
dc.date2001-02-20
dc.date.accessioned2026-07-07T10:32:47Z
dc.date.available2026-07-07T10:32:47Z
dc.descriptionWe analyze the role of the nonperturbative input in the Collins, Soper, and Sterman (CSS)'s $b$-space QCD resummation formalism for Drell-Yan transverse momentum ($Q_T$) distributions, and investigate the predictive power of the CSS formalism. We find that the predictive power of the CSS formalism has a strong dependence on the collision energy $\sqrt{S}$ in addition to its well-known $Q^2$ dependence, and the $\sqrt{S}$ dependence improves the predictive power at collider energies. We show that a reliable extrapolation from perturbatively resummed $b$-space distributions to the nonperturbative large $b$ region is necessary to ensure the correct $Q_T$ distributions. By adding power corrections to the renormalization group equations in the CSS formalism, we derive a new extrapolation formalism. We demonstrate that at collider energies, the CSS resummation formalism plus our extrapolation has an excellent predictive power for $W$ and $Z$ production at all transverse momenta $Q_T\le Q$. We also show that the $b$-space resummed $Q_T$ distributions provide a good description of Drell-Yan data at fixed target energies.
dc.descriptionLatex, 43 pages including 15 figures; typos were corrected
dc.identifierhttps://arxiv.org/abs/hep-ph/0012348
dc.identifierhttp://arxiv.org/abs/hep-ph/0012348
dc.identifierPhys.Rev.D63:114011,2001
dc.identifierdoi:10.1103/PhysRevD.63.114011
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/178878
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectNuclear Theory
dc.titleRole of the nonperturbative input in QCD resummed Drell-Yan $Q_T$-distributions
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