MEASUREMENT OF W-PRODUCTION AND Z-PRODUCTION PROPERTIES AT THE CERN PBARP COLLIDER

A study has been made of the production characteristics of W and Z bosons produced at the CERN pp Collider. The event sample consists of 251 W→ev decays, and 39 Z→e+e- decays, identified by the UA2 detector, and corresponds to an integrated luminosity of 142 nb-1 at √s = 546 GeV, and 768 nb-1 at √s = 630 GeV. Measurements of W and Z production cross sections, of longitudinal and transverse momentum distributions, and of associated jet production, are presented. These measurements are compared with theoretical expectations, which include higher order QCD effects. © 1987

MEASUREMENT OF THE STRONG COUPLING CONSTANT-ALPHA-S FROM A STUDY OF W BOSONS PRODUCED IN ASSOCIATION WITH JETS

The UA2 experiment at the CERN pp Collider has identified a total sample of 251 W→eν events. Among this sample 221 events are found without jets and 29 with one jet. The yield of one-jet events relative to that of zero-jet events provides a measurement of the strong coupling constant: αs(Mw2)=0.13±0.03(stat) ±0.03±(syst1)±0.02(syst2), where syst1 represents the experimental systematic error and syst2 is an estimate of the theoretical uncertainty. © 1988