TESTING MULTIPLE GLUON DYNAMICS AT THE FERMILAB-TEVATRON

We propose the measurement of the ratio R-CSS(Q(T)(min)) = sigma(Q(T)> Q(T)(min))/sigma(total) to study the effects of multiple soft gluon ra diation, predicted by QCD, on the transverse momentum (Q(T)) distribut ion of the weak gauge bosons W-z and Z(0) produced at the Tevatron. We compare the prediction of the extended Collins-Soper-Sterman resummat ion formalism with the next-to-leading and next to next-to-leading ord er calculations. We show that both. the rich dynamics of the QCD multi ple soft gluon radiation and the non perturbative sector of QCD can be tested by measuring R-CSS.