Role of nonperturbative input in QCD resummed heavy boson $Q_T$ distribution

Abstract

We show that role of nonperturbative input in the $b$-space QCD resummation formalism for heavy boson transverse momentum ($Q_T$) distribution strongly depends on collision energy $\sqrt{S}$. At collider energies, the larger $\sqrt{S}$ is, the weaker role nonperturbative input plays, and better predictive power the $b$-space resummation formalism has.

Comments: Latex, 4 pages, to be published in the proceedings of XXXVII Rencontres de Moriond on "QCD and High Energy Hadronic Interactions"