Measurement of the $W$ Boson Mass

TL;DR

This paper reports a precise measurement of the $W$ boson mass using 5982 decay events from proton-antiproton collisions at 1.8 TeV, combining transverse mass spectrum analysis with $Z$ boson mass data.

Contribution

It provides a new, more precise measurement of the $W$ boson mass based on collider data and improved analysis techniques.

Findings

Measured $W$ boson mass: 80.350 GeV/c^2

Uncertainty components: statistical, systematic, and scale

Results contribute to testing the Standard Model

Abstract

A measurement of the mass of the $W$ boson is presented based on a sample of 5982 $W \rightarrow e \nu$ decays observed in $p\overline{p}$ collisions at $\sqrt{s}$ = 1.8~TeV with the D\O\ 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 $M_W = 80.350 \pm 0.140 (stat.) \pm 0.165 (syst.) \pm 0.160 (scale) GeV/c^2$.