Direct measurement of the W boson width in p&pmacr; collisions at radicals = 1.8 TeV

D Theriot; R Thurman-Keup; P Tipton; S Tkaczyk; K Tollefson; A Tollestrup; H Toyoda; W Trischuk; de Troconiz JF; J Tseng; N Turini; F Ukegawa; T Vaiciulis; J Valls; S Vejcik 3rd; G Velev; R Vidal; R Vilar; I Volobouev I; D Vucinic; RG Wagner; RL Wagner; J Wahl; NB Wallace; AM Walsh; C Wang

doi:10.1103/PhysRevLett.85.3347

Direct measurement of the W boson width in p&pmacr; collisions at radicals = 1.8 TeV

Phys Rev Lett. 2000 Oct 16;85(16):3347-52. doi: 10.1103/PhysRevLett.85.3347.

Affiliation

¹ Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.

PMID: 11030893
DOI: 10.1103/PhysRevLett.85.3347

Abstract

This Letter describes a direct measurement of the W boson total decay width, gamma(W), using the Collider Detector at Fermilab. The measurement uses an integrated luminosity of 90 pb(-1), collected during the 1994-1995 run of the Fermilab Tevatron p&pmacr; collider. The width is determined by normalizing predicted signal and background distributions to 49 844 W-->enu candidates and 21 806 W-->&mgr;nu candidates in the transverse-mass region M(T)<200 GeV and then fitting the predicted shape to the 438 electron events and 196 muon events in the high- M(T) region, 100<M(T)<200 GeV. The result is gamma(W) = 2.04+/-0.11(stat)+/-0.09(syst) GeV.