Measurement of the ratio of differential cross sections for W and Z boson production as a function of transverse momentum in pbar p collisions at sqrt(s)=1.8 TeV

We report on a measurement of the ratio of the differential cross sections for $W$ and $Z$ boson production as a function of transverse momentum in proton-antiproton collisions at sqrt(s)=1.8 TeV. The evaluation of the ratio of cross sections leads to reduced uncertainties for both the data and the theoretical predictions.