Electroweak Physics Results from the DZero Detector at Fermilab

TL;DR

This paper reports measurements of electroweak gauge boson production and interactions from the DZero experiment at Fermilab, testing the Standard Model's gauge couplings through various diboson production processes.

Contribution

It provides new measurements and limits on gauge boson couplings, including W, Z, WW extgamma, and ZZ extgamma, using data from proton-antiproton collisions at 1.8 TeV.

Findings

Measured W and Z production cross sections and W width.

Set limits on anomalous WWZ and WW extgamma couplings.

Constrained ZZ extgamma and Z extgamma extgamma couplings.

Abstract

We present electroweak physics results from the DZero experiment using data from collisions at \sqrt{s} = 1.8 TeV, concentrating on single W and Z production cross sections and the production of electroweak gauge boson pairs. The inclusive cross sections times branching ratios for W and Z production have been measured and are used to determine the inclusive width of the W boson. Direct tests of the WW\gamma and WWZ trilinear gauge boson couplings are derived from the study of diboson production. These measurements test the non-abelian self couplings of the W, Z and photon, one of the most direct consequences of the SU(2)_L \times U(1)_Y gauge symmetry. We present measurements of the WW\gamma coupling based on p pbar --> l \nu \gamma + X and limits on anomalous WWZ and WW\gamma couplings based on searches for p \pbar --> W^+ W^- + X --> l l' \nu \nubar + X and p \pbar --> WW / WZ + X --> e \nu + jets + X. We also present limits on the ZZ\gamma and Z\gamma\gamma couplings based on p pbar --> l^+ l^- \gamma + X events.