Search for resonant $WZ$ production in the fully leptonic final state in proton-proton collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector

TL;DR

This paper reports a search for heavy resonances decaying into WZ bosons in fully leptonic final states using 13 TeV proton-proton collision data from the ATLAS detector, setting limits on new particle production.

Contribution

It presents the first search for heavy WZ resonances in the fully leptonic channel at 13 TeV with ATLAS, including constraints on a charged Higgs in the Georgi-Machacek model.

Findings

No significant excess over Standard Model predictions.

Limits set on heavy vector particle production cross section.

Constraints on charged Higgs mass and couplings.

Abstract

A search for a heavy resonance decaying into $WZ$ in the fully leptonic channel (electrons and muons) is performed. It is based on proton-proton collision data collected by the ATLAS experiment at the Large Hadron Collider at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 36.1 fb$^{-1}$. No significant excess is observed over the Standard Model predictions and limits are set on the production cross section times branching ratio of a heavy vector particle produced either in quark-antiquark fusion or through vector-boson fusion. Constraints are also obtained on the mass and couplings of a singly charged Higgs boson, in the Georgi-Machacek model, produced through vector-boson fusion.