# A direct Measurement of the W Boson Width in $p\bar{p}$ Collisions at $\sqrt{s}$ = 1.96 TeV

Abstract : A direct measurement of the total decay width of the W boson G_W is presented using 350 pb-1 of data from ppbar collisions at sqrt(s) = 1.96 TeV collected with the CDF II detector at the Fermilab Tevatron. The width is determined by normalizing predicted signal and background distributions to 230185 W candidates decaying to enu and munu in the transverse-mass region 50 < M_T < 90 GeV and then fitting the predicted shape to 6055 events in the high-M_T region, 90 < M_T < 200 GeV. The result is G_W = 2032 +/- 45 (stat.) +/- 57 (syst.) MeV, consistent with the standard model expectation.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00182330
Contributor : Dominique Girod Connect in order to contact the contributor
Submitted on : Thursday, October 25, 2007 - 3:16:02 PM
Last modification on : Wednesday, September 15, 2021 - 2:56:02 PM

### Citation

T. Aaltonen, J. Adelman, T. Akimoto, M.G. Albrow, B. Alvarez Gonzalez, et al.. A direct Measurement of the W Boson Width in $p\bar{p}$ Collisions at $\sqrt{s}$ = 1.96 TeV. Physical Review Letters, American Physical Society, 2008, 100, pp.071801. ⟨10.1103/PhysRevLett.100.071801⟩. ⟨in2p3-00182330⟩

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