Title: Measurement of the Ratio of the Differential Cross Sections for W and Z Production as a Function of Transverse Momentum
Link to paper if available: http://arxiv.org/abs/hep-ex/0106027 
Session of First Preference: Hard High Energy QCD and Structure Functions
Session of Second Preference: Test of the Standard Model

LP Session: QCD Phenomenology 

Abstract (max 1000 characters): 

 We report 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}=1.8TeV.  It has
 been shown that the ratio between W and Z boson observables can be
 reliably calculated using perturbative QCD, even when the individual
 observables are not. We present the first comparison between the
 measurement of a W and Z observable ratio and a purely perturbative
 calculation. The use of a ratio reduces both experimental and
 theoretical uncertainites and might result in smaller overall
 uncertainties on the measured W mass and width, compared to currently
 used methods at hadron colliders.

Submitted:  9 April 2001