Limits on WWZ and WW\gamma couplings from p\bar{p}\to e\nu jj X events at \sqrt{s} = 1.8 TeV

TL;DR

This paper sets experimental limits on anomalous WWZ and WWγ couplings using proton-antiproton collision data at 1.8 TeV, constraining new physics beyond the Standard Model.

Contribution

First to provide experimental bounds on WWZ and WWγ couplings from p-pbar collision data at Tevatron energies.

Findings

95% CL limits on CP-conserving couplings: -0.33<λ<0.36 and -0.43<Δκ<0.59.

Used 96 pb^{-1} of data from Fermilab Tevatron Collider.

Constraints depend on assumptions about coupling parameters and form factor scale.

Abstract

We present limits on anomalous WWZ and WW-gamma couplings from a search for WW and WZ production in p-bar p collisions at sqrt(s)=1.8 TeV. We use p-bar p -> e-nu jjX events recorded with the D0 detector at the Fermilab Tevatron Collider during the 1992-1995 run. The data sample corresponds to an integrated luminosity of 96.0+-5.1 pb^(-1). Assuming identical WWZ and WW-gamma coupling parameters, the 95% CL limits on the CP-conserving couplings are -0.33<lambda<0.36 (Delta-kappa=0) and -0.43<Delta-kappa<0.59 (lambda=0), for a form factor scale Lambda = 2.0 TeV. Limits based on other assumptions are also presented.