Limits on Anomalous WWgamma and WWZ Couplings

TL;DR

This paper sets experimental limits on anomalous WWgamma and WWZ gauge boson couplings by analyzing multiple final states in proton-antiproton collisions at 1.8 TeV, constraining new physics beyond the Standard Model.

Contribution

It provides the first simultaneous fit to multiple gauge boson pair final states to constrain anomalous couplings at Tevatron energies.

Findings

95% C.L. limits on Delta kappa and lambda couplings

Constraints assuming identical WWgamma and WWZ couplings

Limits under various coupling relationship assumptions

Abstract

Limits on the anomalous WWgamma and WWZ couplings are presented from a simultaneous fit to the data samples of three gauge boson pair final states in pbar-p collisions at sqrt(s)=1.8 TeV: Wgamma production with the W boson decaying to enu or munu, W boson pair production with both of the W bosons decaying to enu or munu, and WW or WZ production with one W boson decaying to enu and the other W boson or the Z boson decaying to two jets. Assuming identical WWgamma and WWZ couplings, 95 % C.L. limits on the anomalous couplings of -0.30<Delta kappa<0.43 (lambda = 0) and -0.20<lambda<0.20 (Delta kappa = 0) are obtained using a form factor scale Lambda = 2.0 TeV. Limits found under other assumptions on the relationship between the WWgamma and WWZ couplings are also presented.