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

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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:
Detectors and Experimental Techniques
Acceso en línea:http://cds.cern.ch/record/1386679
Descripción
Sumario: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.

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