Direct measurement of the W boson width

Details Direct measurement of the W boson width Direct measurement of the W boson width

2009-09-25

arxiv.org/abs/0909.4814v2

Phys.Rev.Lett.103:231802,2009

Physics

High Energy Physics

High Energy Physics - Experiment

7 pages, 1 figure, published in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.103.231802

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.

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