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A Search for ttbar Resonances in the Dilepton Channel in 1.04/fb of pp Collisions at sqrt(s) = 7 TeV

This poster presents a search for a high mass ttbar resonance in pp collisions at sqrt(s) = 7 TeV at the LHC. We search for such a resonance using the final state where both W bosons from the top quark decay into either an electron and electron-neutrino or a muon and muon-neutrino (dilepton final st...

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Detalles Bibliográficos
Autores principales: Petteni, M, Stelzer, B, Stelzer-Chilton, O, Swedish, S, Boudreau, M, Barta, R, Pollard, C, Kotwal, A, Gay, C
Lenguaje:eng
Publicado: 2011
Materias:
Acceso en línea:http://cds.cern.ch/record/1386679
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author Petteni, M
Stelzer, B
Stelzer-Chilton, O
Swedish, S
Boudreau, M
Barta, R
Pollard, C
Kotwal, A
Gay, C
author_facet Petteni, M
Stelzer, B
Stelzer-Chilton, O
Swedish, S
Boudreau, M
Barta, R
Pollard, C
Kotwal, A
Gay, C
author_sort Petteni, M
collection CERN
description This poster presents a search for a high mass ttbar resonance in pp collisions at sqrt(s) = 7 TeV at the LHC. We search for such a resonance using the final state where both 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 1.04/fb. No statistically significant excess above the Standard Model expectation is observed. Upper limits at the 95% Confidence Limit (C.L) are set on the cross section times branching ratio of the resonance decaying to ttˉ pairs as a function of the resonance pole mass. A lower mass limit of 0.84~TeV is set for the case of a Kaluza Klein gluon resonance in the Randall-Sundrum Model.
id cern-1386679
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2011
record_format invenio
spelling cern-13866792019-09-30T06:29:59Zhttp://cds.cern.ch/record/1386679engPetteni, MStelzer, BStelzer-Chilton, OSwedish, SBoudreau, MBarta, RPollard, CKotwal, AGay, CA Search for ttbar Resonances in the Dilepton Channel in 1.04/fb of pp Collisions at sqrt(s) = 7 TeVDetectors and Experimental TechniquesThis poster presents a search for a high mass ttbar resonance in pp collisions at sqrt(s) = 7 TeV at the LHC. We search for such a resonance using the final state where both 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 1.04/fb. No statistically significant excess above the Standard Model expectation is observed. Upper limits at the 95% Confidence Limit (C.L) are set on the cross section times branching ratio of the resonance decaying to ttˉ pairs as a function of the resonance pole mass. A lower mass limit of 0.84~TeV is set for the case of a Kaluza Klein gluon resonance in the Randall-Sundrum Model.ATL-PHYS-SLIDE-2011-616oai:cds.cern.ch:13866792011-09-30
spellingShingle Detectors and Experimental Techniques
Petteni, M
Stelzer, B
Stelzer-Chilton, O
Swedish, S
Boudreau, M
Barta, R
Pollard, C
Kotwal, A
Gay, C
A Search for ttbar Resonances in the Dilepton Channel in 1.04/fb of pp Collisions at sqrt(s) = 7 TeV
title A Search for ttbar Resonances in the Dilepton Channel in 1.04/fb of pp Collisions at sqrt(s) = 7 TeV
title_full A Search for ttbar Resonances in the Dilepton Channel in 1.04/fb of pp Collisions at sqrt(s) = 7 TeV
title_fullStr A Search for ttbar Resonances in the Dilepton Channel in 1.04/fb of pp Collisions at sqrt(s) = 7 TeV
title_full_unstemmed A Search for ttbar Resonances in the Dilepton Channel in 1.04/fb of pp Collisions at sqrt(s) = 7 TeV
title_short A Search for ttbar Resonances in the Dilepton Channel in 1.04/fb of pp Collisions at sqrt(s) = 7 TeV
title_sort search for ttbar resonances in the dilepton channel in 1.04/fb of pp collisions at sqrt(s) = 7 tev
topic Detectors and Experimental Techniques
url http://cds.cern.ch/record/1386679
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