Search for WZ resonances in the fully leptonic channel using pp collisions at sqrt(s) = 8 TeV with the ATLAS detector

TL;DR

This paper reports a search for WZ resonances in proton-proton collisions at 8 TeV using the ATLAS detector, setting new lower mass limits on potential new particles with no observed deviations from the Standard Model.

Contribution

First search for WZ resonances in leptonic decay channels at 8 TeV with ATLAS, establishing new mass exclusion limits for W' bosons.

Findings

No significant deviation from Standard Model observed.

Lower mass limit of 1.52 TeV set for W' bosons.

Constraints placed on models predicting heavy vector triplets.

Abstract

A search for resonant WZ production in the lnul'l' (l, l'= e,mu) decay channel using 20.3 fb-1 of sqrt(s) = 8 TeV pp collision data collected by the ATLAS experiment at LHC is presented. No significant deviation from the Standard Model prediction is observed and upper limits on the production cross sections of WZ resonances from an extended gauge model W' and from a simplified model of heavy vector triplets are derived. A corresponding observed (expected) lower mass limit of 1.52 (1.49) TeV is derived for the W' at the 95% confidence level.