Citation
T. Affolder et al., Direct measurement of the W boson width in p(p)over-bar collisions at roots=1.8 TeV, PHYS REV L, 85(16), 2000, pp. 3347-3352
Abstract
This Letter describes a direct measurement of the W boson total decay width
, Gamma(W), using the Collider Detector at Fermilab. The measurement uses a
n integrated luminosity of 90 pb-L, collected during the 1994-1995 run of t
he Fermilab Tevatron pr collider. The width is determined by normalizing pr
edicted signal and background distributions to 49 843 W --> ev candidates a
nd 21 806 W --> mu nu candidates in the transverse-mass region M-T < 200 Ge
V and then fitting the predicted shape to the 438 electron events and 196 m
uon events in the high-M-T region, 100 < M-T < 200 GeV. The result is Gamma
(W) = 2.04 +/- 0.11(stat) +/- 0.09(syst) GeV.