Measurement of the W boson mass with the Collider Detector at Fermilab

Authors

• T. Affolder, Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, California
• Kenneth A. Bloom, University of Nebraska-LincolnFollow
• Collider Detector at Fermilab Collaboration

Document Type

Article

Date of this Version

9-1-2001

Comments

Published by American Physical Society. Phys. Rev. D 64, 052001 (2001). http://prd.aps.org. Copyright © 2001 American Physical Society. Permission to use.

Abstract

We present a measurement of the W boson mass using data collected with the CDF detector during the 1994–1995 collider run at the Fermilab Tevatron. A fit to the transverse mass spectrum of a sample of 30115 W→eν events recorded in an integrated luminosity of 84 pb^-1 gives a mass M_w=80.473±0.065(stat) ±0.092(syst) GeVc². A fit to the transverse mass spectrum of a sample of 14740 W→μν events from 80 pb^-1 gives a mass M_w=80.465±0.100(stat) ±0.103(syst) GeV/c². The dominant contributions to the systematic uncertainties are the uncertainties in the electron energy scale and the muon momentum scale, 0.075 GeV/c² and 0.085 GeV/c², respectively. The combined value for the electron and muon channel is M_w=80.470±0.089 GeV/c². When combined with previously published CDF measurements, we obtain M_w=80.433±0.079 GeV/c².