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.
Highlights
Many extensions to the Standard Model (SM) predict new massive particles that can decay to WW, WZ, or ZZ final states [1,2,3]
This article describes a search for a narrow resonance decaying to either a WW or WZ diboson intermediate state with subsequent decays to an ‘jj final state, i.e. a charged lepton, large missing transverse momentum ðEmT issÞ, and at least two jets
Data corresponding to 4:7 fbÀ1 collected by the ATLAS experiment apt ffiffithe Large Hadron Collider (LHC) in pp collisions at s 1⁄4 7 TeV are used
Summary
Many extensions to the Standard Model (SM) predict new massive particles that can decay to WW, WZ, or ZZ final states [1,2,3]. The ‘jj final state allows the reconstruction of the invariant mass of the system, under certain assumptions for neutrino momentum from a W boson decay. In the nominal EGM, the coupling strength scaling factor cEGM is set to one This analysis derives exclusion limits for a range of values of this parameter as a function of the invariant mass of the ‘jj system. Similar searches, mentioned above, for a ZZ resonance by the ATLAS Collaboration exclude an RS1 graviton with mass below 845 GeV [10]. The CMS Collaboration reports a ZZ resonance search in the ‘‘jj final state and excludes an RS1 graviton with mass below 945 resonance aTteVpffis[ffi11⁄44].7PTreevVioubsy direct the searches ATLAS for and a WZ CMS. Collaborations exclude the EGM W0 benchmark with mass below 760 GeV [9] and 1143 GeV [15], respectively
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