Measurement of theW-boson mass in 1.8-TeVp¯pcollisions

Abstract

We have determined $m_W=79.91\mathrm{}\pm 0.39$ GeV/${\mathit{c}}^2$ from an analysis of $W\to e\nu$ and $W\to \mu \nu$ data from the Collider Detector at Fermilab in $\overline{p}p$ collisions at $\sqrt{s}=1.8\mathrm{}$ TeV. From this result and the world-average $Z$ mass, the weak mixing angle is determined to be ${{sin}^2\theta }_W=0.232\mathrm{}\pm 0.008$. An upper bound on the top-quark mass derived from this result is discussed.