Direct measurement of the W boson decay width

Authors

V. M. Abazov, Joint Institute for Nuclear Research, Dubna, Russia
Gregory R. Snow, University of Nebraska-LincolnFollow
D0 Collaboration

Date of this Version

8-27-2002

Comments

Published by American Physical Society. Phys. Rev. D 66, 032008 (2002). http://prd.aps.org. Copyright © 2002 American Physical Society. Used by permission.

Abstract

Based on 85 pb^-1 data of pp̅ collisions at √s = 1.8 TeV collected using the DØ detector at Fermilab during the 1994–1995 run of the Tevatron, we present a direct measurement of the total decay width of the W boson Γ_W . The width is determined from the transverse mass spectrum in the W→e+ν _ℯ decay channel and found to be Γ_W=2.23_-0.14^+0.15 (stat) ±0.10(syst) GeV, consistent with the expectation from the standard model.