Measurement of the W Boson Mass

Le résumé fourni par la source

We present a measurement of the mass of the $W$ boson using data collected with the Collider Detector at Fermilab during the 1992--93 collider run at the Fermilab Tevatron. A fit to the transverse mass spectrum of a sample of 3268 $W\ensuremath{\rightarrow}\ensuremath{\mu}\ensuremath{\nu}$ events recorded in an integrated luminosity of $19.7{\mathrm{pb}}^{\ensuremath{-}1}$ gives a mass ${M}_{W}^{\ensuremath{\mu}}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}80.310\ifmmode\pm\else\textpm\fi{}0.205(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}0.130(\mathrm{syst})\mathrm{GeV}{/c}^{2}$. A fit to 5718 $W\ensuremath{\rightarrow}e\ensuremath{\nu}$ events recorded in 18.2 p${\mathrm{b}}^{--1}$ gives ${M}_{W}^{e}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}80.490\ifmmode\pm\else\textpm\fi{}0.145(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}0.175\left(\mathrm{syst}\right)\mathrm{GeV}{/c}^{2}$. Combining these results, accounting for correlated uncertainties, yields ${M}_{W}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}80.410\ifmmode\pm\else\textpm\fi{}0.180\mathrm{GeV}{/c}^{2}$.

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