Direct Measurement of the W Boson Width in pp¯ Collisions at s=1.96TeV

T. Aaltonen et al. (CDF Collaboration)
Phys. Rev. Lett. 100, 071801 – Published 19 February 2008

Abstract

A direct measurement of the total decay width of the W boson ΓW is presented using 350pb1 of data from pp¯ collisions at s=1.96TeV collected with the CDF II detector at the Fermilab Tevatron. The width is determined by normalizing predicted signal and background distributions to 230 185 W candidates decaying to eν and μν in the transverse-mass region 50<MT<90GeV and then fitting the predicted shape to 6055 events in the high-MT region, 90<MT<200GeV. The result is ΓW=2032±45stat±57systMeV, consistent with the standard model expectation.

  • Figure
  • Received 22 October 2007

DOI:https://doi.org/10.1103/PhysRevLett.100.071801

©2008 American Physical Society

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Vol. 100, Iss. 7 — 22 February 2008

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