Direct Measurement of the W Boson Width in ppbar Collisions at roots = 1.8 TeV
Abstract
This Letter describes a direct measurement of the W boson total decay width, , using the Collider Detector at Fermilab. The measurement uses an integrated luminosity of 90∈vpb, collected during the 1994--1995 run of the Fermilab Tevatron p collider. The width is determined by normalizing predicted signal and background distributions to 49844 candidates and 21806 candidates in the transverse-mass region MT<200 and then fitting the predicted shape to the 438 electron events and 196 muon events in the high-MT region, 100<MT<200. The result is W=2.040.11(stat)0.09(syst)GeV.
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