Limits on $WWZ$ and $WW\gamma$ couplings from $WW$ and $WZ$ production in $p\overline{p}$ collisions at $\sqrt{s} = 1.8$ TeV

TL;DR

This paper sets experimental limits on anomalous $WWZ$ and $WW\gamma$ couplings by analyzing $WW$ and $WZ$ production in proton-antiproton collisions at 1.8 TeV, providing insights into electroweak interaction deviations.

Contribution

It provides the first direct experimental constraints on $WWZ$ and $WW\gamma$ couplings at high energies, testing the Standard Model predictions.

Findings

Results agree with the Standard Model SU(2)×U(1) theory.

Evidence suggests non-zero $WWZ$ coupling near 500 GeV.

Bounds on anomalous couplings are established at 95% CL.

Abstract

Direct limits are set on $WWZ$ and $WW\gamma$ three-boson couplings in a search for $WW$ and $WZ$ production with high transverse momentum in $p\overline{p}$ collisions at $\sqrt{s} = 1.8$ TeV, using the Collider Detector at Fermilab. The results are in agreement with the SU(2) $\times$ U(1) model of electroweak interactions. Assuming Standard Model $WW\gamma$ coupling, the the limits are interpreted as direct evidence for a non-zero $WWZ$ coupling at subprocess energies near 500 GeV. Alternatively, assumiong identical $WWZ$ and $WW\gamma$ couplings, bounds $-0.11 < \kappa < 2.27$ and $-0.81 < \lambda < 0.84$ are obtained at $95\%$ CL for a form factor scale 1000 GeV.