Search for a resonance decaying into WZ boson pairs in $p\bar{p}$ collisions

TL;DR

This paper reports the first search for a charged W' resonance decaying into WZ boson pairs in proton-antiproton collisions, setting new limits on W' properties and excluding certain mass ranges.

Contribution

It introduces the first search for W' decaying to WZ in p-pbar collisions and establishes the most restrictive limits to date on related models.

Findings

No significant excess observed over background.

Excluded W' masses between 188 and 520 GeV.

Set new limits on W'WZ coupling and production cross section.

Abstract

We present the first search for an electrically charged resonance $W^\prime$ decaying to a WZ boson pair using 4.1 fb$^{-1}$ of integrated luminosity collected with the D0 detector at the Fermilab Tevatron $p\bar{p}$ collider. The WZ pairs are reconstructed through their decays into three charged leptons ($\ell=e,\mu$). A total of 9 data events is observed in good agreement with the background prediction. We set 95% C.L. limits on the W'WZ coupling and on the W' production cross section multiplied by the branching fractions. We also exclude W' masses between 188 and 520 GeV within a simple extension of the standard model and set the most restrictive limits to date on low-scale technicolor models.