This Letter describes a direct measurement of the W boson total
decay width, Gamma(W), using the Collider Detector at Fermilab. The
measurement uses an integrated luminosity of 90 pb-1, collected during the
1994-1995 run of the Fermilab Tevatron p anti-p collider. The width is
determined by normalizing predicted signal and background distributions to
49844 W --> e nu candidates and 21806 W --> mu nu candidates in the
transverse-mass region M_T < 200 GeV and then fitting the predicted shape to
the 438 electron events and 196 muon 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.
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Updated: Wednesday, 2000 November 29 12:07:02 CST automatically from input from Carol Picciolo