Measurements of the W Boson Mass and Trilinear Gauge Boson Couplings at the Tevatron

Abstract

We present measurements of the W boson mass at the Tevatron based on $W\to \hat{I}¼\hat{I}½$ events collected by CDF and $W\to e\hat{I}½$ events observed by D0 in Run Ib (1994--95). The W boson mass measured in the preliminary CDF analysis is 80.43 \pm 0.10 (stat) \pm 0.12 (syst) GeV/c^2. The D0 measured value is 80.44 \pm 0.10 (stat) \pm 0.07 (syst) GeV/c^2. We also describe measurements of the trilinear gauge boson couplings. The limits obtained on the WWγand WWZ anomalous couplings from a combined D0 analysis using $W{\hat{I}}^3$, $WW\to \ell \hat{I}½{\ell }^{\prime }\hat{I}{½}^{\prime }$, and $WW/WZ\to e\hat{I}½jj$ production are: -0.30 < Δκ< 0.43, -0.20 < λ< 0.20, and -0.52 < Δg^Z_1 < 0.78, for a dipole form factor scale of 2 TeV. Improved limits have been obtained by combining these results with the limits derived from the LEP experiments.

7 pages, including 6 figures. Paper to be published in Proceedings of the XXXIIId Rencontres de Moriond, Electroweak Interactions and Unified Theories, Les Arcs, Savoie, France, March 14-21 1998