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→μν events recorded in an integrated luminosity of 19.7 ${\mathrm{pb}}^{\mathrm{-}1}$ gives ${\mathit{M}}_{\mathit{W}}^{\mathrm{\mu }}$=80.310±0.205 (stat)±0.130 (syst) GeV/${\mathit{c}}^2$. A fit to the transverse mass spectrum of a sample of 5718 W→eν events recorded in 18.2 ${\mathrm{pb}}^{\mathrm{-}1}$ gives ${\mathit{M}}_{\mathit{W}}^{\mathit{e}}$=80.490±0.145 (stat)±0.175 (syst) GeV/${\mathit{c}}^2$. Combining the muon and electron results, accounting for correlated uncertainties, yields ${\mathit{M}}_{\mathit{W}}$=80.410±0.180 GeV/${\mathit{c}}^2$.