On the determination of limits on the number of light neutrinos and the top quark mass from W, Z production in pp collisions
The ratio of the (acceptance corrected) number of W's and Z's observed at the CERN collider is compared with the prediction of the standard model. Possible sources of error are carefully studied. A new analysis of deep inelastic data is performed in order to significantly improve the accuracy of the standard model prediction. The implications for the number of light neutrinos and the mass of the top quark are discussed.