A search for ttbar resonances in the lepton plus jets final state using 4.66 fb^-1 of pp collisions at sqrt(s) = 7 TeV

A search for new particles that decay into ttbar pairs is performed with the ATLAS experiment at the LHC using 4.66 fb^-1 of data collected at 7 TeV. The ttbar system is reconstructed using the lepton plus jets decay channel, both with standard jets and by exploiting jet substructure. No evidence fo...

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Detalles Bibliográficos
Autor principal: The ATLAS collaboration
Lenguaje:eng
Publicado: 2012
Materias:
Detectors and Experimental Techniques
Acceso en línea:http://cds.cern.ch/record/1478974
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author The ATLAS collaboration
author_facet The ATLAS collaboration
author_sort The ATLAS collaboration
collection CERN
description A search for new particles that decay into ttbar pairs is performed with the ATLAS experiment at the LHC using 4.66 fb^-1 of data collected at 7 TeV. The ttbar system is reconstructed using the lepton plus jets decay channel, both with standard jets and by exploiting jet substructure. No evidence for a ttbar resonance is observed. For a narrow Z' boson, the 95% credibility level cross section times branching ratio upper limits range from 3.2 pb at a resonance mass of 0.7 TeV to 0.05 for a mass of 2 TeV. Leptophobic topcolor Z' resonances are excluded for masses below 1.7 TeV and Randall-Sundrum Kaluza-Klein gluon excitations are excluded for masses below 1.9 TeV at a 95% credibility level.
id cern-1478974
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2012
record_format invenio
spelling cern-14789742021-04-18T19:37:45Zhttp://cds.cern.ch/record/1478974engThe ATLAS collaborationA search for ttbar resonances in the lepton plus jets final state using 4.66 fb^-1 of pp collisions at sqrt(s) = 7 TeVDetectors and Experimental TechniquesA search for new particles that decay into ttbar pairs is performed with the ATLAS experiment at the LHC using 4.66 fb^-1 of data collected at 7 TeV. The ttbar system is reconstructed using the lepton plus jets decay channel, both with standard jets and by exploiting jet substructure. No evidence for a ttbar resonance is observed. For a narrow Z' boson, the 95% credibility level cross section times branching ratio upper limits range from 3.2 pb at a resonance mass of 0.7 TeV to 0.05 for a mass of 2 TeV. Leptophobic topcolor Z' resonances are excluded for masses below 1.7 TeV and Randall-Sundrum Kaluza-Klein gluon excitations are excluded for masses below 1.9 TeV at a 95% credibility level.ATLAS-CONF-2012-136oai:cds.cern.ch:14789742012-09-20
spellingShingle Detectors and Experimental Techniques
The ATLAS collaboration
A search for ttbar resonances in the lepton plus jets final state using 4.66 fb^-1 of pp collisions at sqrt(s) = 7 TeV
title A search for ttbar resonances in the lepton plus jets final state using 4.66 fb^-1 of pp collisions at sqrt(s) = 7 TeV
title_full A search for ttbar resonances in the lepton plus jets final state using 4.66 fb^-1 of pp collisions at sqrt(s) = 7 TeV
title_fullStr A search for ttbar resonances in the lepton plus jets final state using 4.66 fb^-1 of pp collisions at sqrt(s) = 7 TeV
title_full_unstemmed A search for ttbar resonances in the lepton plus jets final state using 4.66 fb^-1 of pp collisions at sqrt(s) = 7 TeV
title_short A search for ttbar resonances in the lepton plus jets final state using 4.66 fb^-1 of pp collisions at sqrt(s) = 7 TeV
title_sort search for ttbar resonances in the lepton plus jets final state using 4.66 fb^-1 of pp collisions at sqrt(s) = 7 tev
topic Detectors and Experimental Techniques
url http://cds.cern.ch/record/1478974
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AT theatlascollaboration searchforttbarresonancesintheleptonplusjetsfinalstateusing466fb1ofppcollisionsatsqrts7tev

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