NONPERTURBATIVE REGIME IN QCD RESUMMATION FOR GAUGE BOSON PRODUCTION AT HADRON COLLIDERS

We study the nonperturbative functions in the Collins-Soper-Sterman re summation formalism by examining Drell-Yan data in both fixed target a nd collider experiments and then predict the transverse momentum distr ibutions of the W+/- and Z0 bosons at the Fermilab Tevatron. Our resul ts differ from those in the literature and agree better with published CDF data. Using statistical arguments, we find a 1 fb-1 luminosity at the Tevatron should be able to provide useful constraints on the nonp erturbative functions.