The results based on 1992-95 data (Run 1) from the CDF and D0
experiments on the measurements of the W boson mass and width are presented,
along with the combined results. We report a Tevatron collider average M_W
= 80.456 +/- 0.059 GeV. We also report the Tevatron collider average of the
directly measured W boson width Gamma(W) = 2.115 +/- 0.105 GeV. We describe
a new joint analysis of the direct W mass and width measurements. Assuming
the validity of the standard model, we combine the directly measured W boson
width with the width extracted from the ratio of W and Z boson leptonic
partial cross sections. This combined result for the Tevatron is Gamma(W) =
2.135 +/- 0.050 GeV. Finally, we use the measurements of the direct total W
width and the leptonic branching ratio to extract the leptonic partial width
Gamma(W --> e nu) = 224 +/- 13 MeV.
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Updated: Friday, 2005 February 11 11:24:18 CST automatically from input from Carol Picciolo