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

Abstract

Direct limits are set on $WWZ$ and $WWγ$ 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 $WWγ$ 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 $WWγ$ couplings, bounds $-0.11 < κ< 2.27$ and $-0.81 < λ< 0.84$ are obtained at $95\%$ CL for a form factor scale 1000 GeV.