A Search for tt Resonances in the Dilepton Channel in 2.05 fb−1 of pp collisions at √s = 7 TeV with the ATLAS experiment

A search for a high mass tart resonance in pp collisions at sqrts=7~TeV at the LHC is presented. We search for such a resonance using the final state where the W bosons from the top quark decay into either an electron and electron-neutrino or a muon and muon-neutrino (dilepton final state). The data...

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Detalles Bibliográficos
Autor principal: Petteni, M
Lenguaje:eng
Publicado: 2012
Materias:
Detectors and Experimental Techniques
Acceso en línea:http://cds.cern.ch/record/1490302
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author Petteni, M
author_facet Petteni, M
author_sort Petteni, M
collection CERN
description A search for a high mass tart resonance in pp collisions at sqrts=7~TeV at the LHC is presented. We search for such a resonance using the final state where the W bosons from the top quark decay into either an electron and electron-neutrino or a muon and muon-neutrino (dilepton final state). The data were recorded by the ATLAS experiment during 2011 and correspond to a total integrated luminosity of calL=2.05 fb−1. No statistically significant excess above the Standard Model expectation is observed. Upper limits at the 95% Confidence Level are set on the cross section times branching ratio of the resonance decaying to ttbar pairs as a function of the resonance mass. A lower mass limit of 1080~GeV is set for the case of a Kaluza-Klein gluon resonance in the Randall-Sundrum Model.
id cern-1490302
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2012
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spelling cern-14903022019-09-30T06:29:59Zhttp://cds.cern.ch/record/1490302engPetteni, MA Search for tt Resonances in the Dilepton Channel in 2.05 fb−1 of pp collisions at √s = 7 TeV with the ATLAS experimentDetectors and Experimental TechniquesA search for a high mass tart resonance in pp collisions at sqrts=7~TeV at the LHC is presented. We search for such a resonance using the final state where the W bosons from the top quark decay into either an electron and electron-neutrino or a muon and muon-neutrino (dilepton final state). The data were recorded by the ATLAS experiment during 2011 and correspond to a total integrated luminosity of calL=2.05 fb−1. No statistically significant excess above the Standard Model expectation is observed. Upper limits at the 95% Confidence Level are set on the cross section times branching ratio of the resonance decaying to ttbar pairs as a function of the resonance mass. A lower mass limit of 1080~GeV is set for the case of a Kaluza-Klein gluon resonance in the Randall-Sundrum Model.ATL-PHYS-SLIDE-2012-637oai:cds.cern.ch:14903022012-10-27
spellingShingle Detectors and Experimental Techniques
Petteni, M
A Search for tt Resonances in the Dilepton Channel in 2.05 fb−1 of pp collisions at √s = 7 TeV with the ATLAS experiment
title A Search for tt Resonances in the Dilepton Channel in 2.05 fb−1 of pp collisions at √s = 7 TeV with the ATLAS experiment
title_full A Search for tt Resonances in the Dilepton Channel in 2.05 fb−1 of pp collisions at √s = 7 TeV with the ATLAS experiment
title_fullStr A Search for tt Resonances in the Dilepton Channel in 2.05 fb−1 of pp collisions at √s = 7 TeV with the ATLAS experiment
title_full_unstemmed A Search for tt Resonances in the Dilepton Channel in 2.05 fb−1 of pp collisions at √s = 7 TeV with the ATLAS experiment
title_short A Search for tt Resonances in the Dilepton Channel in 2.05 fb−1 of pp collisions at √s = 7 TeV with the ATLAS experiment
title_sort search for tt resonances in the dilepton channel in 2.05 fb−1 of pp collisions at √s = 7 tev with the atlas experiment
topic Detectors and Experimental Techniques
url http://cds.cern.ch/record/1490302
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AT pettenim searchforttresonancesinthedileptonchannelin205fb1ofppcollisionsats7tevwiththeatlasexperiment

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