Limits on anomalous trilinear gauge couplings from WW->e+e-, WW->emu, and WW->mu+mu- events from p-pbar collisions at sqrt(s)=1.96 TeV

TL;DR

This paper sets experimental limits on anomalous trilinear gauge couplings in WW production using data from proton-antiproton collisions at 1.96 TeV, improving constraints on new physics beyond the Standard Model.

Contribution

It provides the first combined limits on anomalous WWgamma and WWZ couplings from multiple decay channels at the Tevatron with 250 pb^{-1} of data.

Findings

95% C.L. limits: -0.32 < Delta kappa < 0.45, -0.29 < lambda < 0.30

Data collected at sqrt(s)=1.96 TeV with the D0 detector

Constraints assume equal WWgamma and WWZ couplings with Lambda=2.0 TeV

Abstract

Limits are set on anomalous WWgamma and WWZ trilinear gauge couplings using W+W- -> e+e-, W+W- -> e mu, and W+W- -> mu+mu- events. The data set was collected by the Run II D0 detector at the Fermilab Tevatron Collider and corresponds to approximately 250 inverse pb of integrated luminosity at sqrt(s) = 1.96 TeV. Under the assumption that the WWgamma couplings are equal to the WWZ couplings and using a form factor scale of Lambda = 2.0 TeV, the combined 95% C.L. one-dimensional coupling limits from all three channels are -0.32 < Delta kappa < 0.45 and -0.29 < lambda < 0.30.