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Abstract: (arXiv)
We present a direct measurement of the width of the W boson using the shape of the transverse mass distribution of W->enu candidates selected in 1 fb-1 of data collected with the D0 detector at the Fermilab Tevatron collider in ppbar collisions at sqrt{s}=1.96 TeV. We use the same methods and data sample that were used for our recently published W boson mass measurement, except for the modeling of the recoil, which is done with a new method based on a recoil library. Our result, 2.028 +- 0.072 GeV, is in agreement with the predictions of the standard model and is the most precise direct measurement result from a single experiment to date.Note:
- 7 pages, 1 figure, submitted to Phys. Rev. Lett
- 13.38.Be
- 14.70.Fm
- 13.85.Qk
- anti-p p: inclusive reaction
- W: hadroproduction
- W: leptonic decay
- mass spectrum: transverse
- W: width
- data analysis method
- recoil
References(31)
Figures(1)