Testing multiple gluon dynamics at the fermilab tevatron

We propose the measurement of the ratio R_CSS(Q^min_T) ≡ σ(Q_T>Q^min_T)/σ_Total to study the effects of the multiple soft gluon radiation, predicted by QCD, on the transverse momentum (QT) distribution of the weak gauge bosons W^± and Z⁰ produced at the Tevatron. We compare the prediction of the extended Collins-Soper-Sterman resummation formalism with the next-to-leading and next-to-next-to-leading order calculations. We show that both the rich dynamics of the QCD multiple soft gluon radiation and the non-perturbative sector of QCD can be tested by measuring R_CSS.