Search for Anomalous $WW$ and $WZ$ production at {D\O}

TL;DR

This paper reports a search for anomalous WW and WZ production in proton-antiproton collisions, setting limits on anomalous couplings based on Tevatron data from 1992-1993.

Contribution

It provides the first direct limits on CP-conserving anomalous WWγ and WWZ couplings using Tevatron data with a specific fit to the W boson transverse momentum spectrum.

Findings

Limits on Δκ and λ parameters at 95% confidence level.

No significant deviation from Standard Model observed.

Constraints depend on assumed form factor scale Λ=1.5 TeV.

Abstract

We present a preliminary result from a search for anomalous $WW$ and $WZ$ production in $p\bar{p}$ collisions at $\sqrt{s}=1.8$ TeV using $p\bar{p}\rightarrow e\nu jj$ events observed during the 1992--1993 run of the Fermilab Tevatron collider. A fit to the $p_T$ spectrum of $W(e\nu)$ yields direct limits on the CP--conserving anomalous $WW\gamma$ and $WWZ$ coupling parameters of $-0.89<\Delta\kappa<1.07~~(\lambda=0)$ and $-0.66<\lambda<0.67~~(\Delta\kappa=0)$ at the $95\ \%$ confidence level, assuming that the $WWZ$ coupling parameters are equal to the $WW\gamma$ coupling parameters, and a form factor scale $\Lambda=1.5$~TeV.