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

作者信息

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

机构信息

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

出版信息

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

DOI:10.1103/PhysRevLett.85.3347

PMID:11030893

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.

摘要