### A Search for Heavy Majorana Neutrino and WR in dilepton plus jets events with the ATLAS detector in pp collisions at √s = 7TeVA Search for Heavy Majorana Neutrino and WR in dilepton plus jets events with the ATLAS detector in pp collisions at √s = 7TeV

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 Source CERN Document Server Content type Text File Format PDF Date Created 2011-08-17 Language English
 Subject Domain (in DDC) Natural sciences & mathematics ♦ Physics ♦ Modern physics ♦ Technology ♦ Engineering & allied operations ♦ Applied physics Subject Keyword dilepton ♦ LRSM ♦ same-sign ♦ heavy majorana neutrino ♦ effective lagrangian ♦ EXOTICS ♦ Detectors and Experimental Techniques ♦ resonance Abstract This note reports on a search for hypothetical heavy Majorana neutrinos and $W_R$ gauge bosons in the context of the Left-Right Symmetric Model, in events with two isolated high-\pT\ same-sign or opposite-sign leptons and high-\pT\ hadronic jets. The data were collected with the ATLAS detector in proton-proton collisions at \rts=7 \TeV, at the CERN Large Hadron Collider (LHC), and correspond to an integrated luminosity of 34 \ipb. No excess above the Standard Model background expectation is observed. Mass-dependent limits on the production cross-sections times branching ratio are presented for $W_R$ gauge bosons masses below 1.8 \TeV. The exclusion region is significantly larger than that obtained from previous measurements. Description Presented at: 46th Rencontres de Moriond on Electroweak Interactions and Unified Theories, La Thuile, Italy, 13 - 20 Mar 2011Collaboration with: ATLAS Learning Resource Type Article Publisher Date 2011-01-01 Rights License Preprint: (License: CC-BY-4.0) Organization The ATLAS collaboration