Search for resonant diboson production in the lvjj decay channels with the ATLAS detector at 7 TeV

TL;DR

This paper reports a search for new resonant particles decaying into diboson final states in proton-proton collisions at 7 TeV using the ATLAS detector, setting limits on various theoretical models.

Contribution

It presents the first search for resonant WW or WZ production in the lvjj channel at 7 TeV with ATLAS, excluding certain mass ranges for specific models.

Findings

No significant excess observed.

Excluded WW resonance masses below 940 GeV.

Excluded WZ resonance masses below 950 GeV.

Abstract

A search for resonant diboson production using a data sample corresponding to 4.7 fb-1 of integrated luminosity collected by the ATLAS experiment at the Large Hadron Collider in pp collisions at 7 TeV is presented. The search for a narrow resonance in the WW or WZ mass distribution is conducted in a final state with an electron or a muon, missing transverse momentum and at least two jets. No significant excess is observed and limits are set using three benchmark models: WW resonance masses below 940 GeV and 710 GeV are excluded at 95% confidence level for spin-2 Randall-Sundrum and bulk Randall-Sundrum gravitons, respectively; WZ resonance masses below 950 GeV are excluded at 95% confidence level for a spin-1 Extended Gauge Model W' boson.