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

TL;DR

This paper reports precise measurements of the W boson mass at the Tevatron and sets limits on anomalous trilinear gauge boson couplings, combining results from CDF, D0, and LEP experiments.

Contribution

It provides new, more precise measurements of the W boson mass and improved limits on gauge boson couplings, enhancing tests of the Standard Model.

Findings

W boson mass measured as approximately 80.43-80.44 GeV/c^2

Limits on anomalous WWγ and WWZ couplings established

Combined analysis with LEP results improves constraints

Abstract

We present measurements of the W boson mass at the Tevatron based on $W \to \mu \nu$ events collected by CDF and $W \to e \nu$ 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 WW\gamma and WWZ anomalous couplings from a combined D0 analysis using $W\gamma$, $WW \to \ell \nu \ell^\prime \nu^\prime$, and $WW/WZ \to e \nu jj$ production are: -0.30 < \Delta\kappa < 0.43, -0.20 < \lambda < 0.20, and -0.52 < \Delta g^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.