Measurement of theWboson mass

This paper presents a measurement of the mass of the W boson using data collected with the CDF detector during the 1992--1993 collider run at the Fermilab Tevatron. A fit to the transverse mass spectrum of a sample of 3268 W{→}{μ}{ν} events recorded in an integrated luminosity of 19.7 pb^-1 gives MW^μ=80.310±{}0.205 (stat)±{}0.130 (syst) GeV/c². A fit to the transverse mass spectrum of a sample of 5718 W{→}e{ν} events recorded in 18.2 pb^-1 gives MWᵉ=80.490±{}0.145 (stat)±{}0.175 (syst) GeV/c². Combining the muon and electron results, accounting for correlated uncertainties, yields MW=80.410±{}0.180 GeV/c².