Determination of the Mass of the W Boson Using the D0 Detector at the Tevatron

TL;DR

This paper reports a precise measurement of the W boson mass using data from the D0 detector at the Tevatron, involving analysis of W to electron-neutrino decays and calibration with Z boson data.

Contribution

It provides a new, precise measurement of the W boson mass based on 1992-1993 data, including detailed systematic uncertainty analysis.

Findings

W boson mass measured as 80.350 GeV/c^2

Uncertainty components include statistical, systematic, and scale errors

Methodology includes calibration with Z boson mass measurements

Abstract

A measurement of the mass of the W boson is presented which is based on a sample of 5982 W -> e nu decays observed in pbar-p collisions at sqrt(s) = 1.8 TeV with the D0 detector during the 1992-1993 run. From a fit to the transverse mass spectrum, combined with measurements of the Z boson mass, the W boson mass is measured to be M_W = 80.350+-0.140(stat)+-0.165(sys)+-0.160(scale) GeV/c^2. Detailed discussions of the determination of the absolute energy scale, the measured efficiencies, and all systematic uncertainties are presented.