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Fully hadronic ttbar cross section measurement with ATLAS detector

The top quark pair production cross section in the fully hadronic final state is characterized by a six jet topology, two of which could be identified as originating from a b-quark using ATLAS b-tagging algorithms. Compared to other decay channels, this final state presents an advantageous larger br...

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Autor principal: Bertella, C
Lenguaje:eng
Publicado: 2011
Materias:
Acceso en línea:http://cds.cern.ch/record/1386669
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author Bertella, C
author_facet Bertella, C
author_sort Bertella, C
collection CERN
description The top quark pair production cross section in the fully hadronic final state is characterized by a six jet topology, two of which could be identified as originating from a b-quark using ATLAS b-tagging algorithms. Compared to other decay channels, this final state presents an advantageous larger branching ratio; on the other hand it suffers from a very large QCD multi-jet background, generally difficult to estimate from Monte Carlo simulation and therefore evaluated using data-driven techniques. It is essential, to efficiently trigger on these fully hadronic ttbar events, to use dedicated triggers. An overview of the analysis for ttbar production cross section measurement in the fully hadronic final state and the state-of-the-art of the b-jet trigger performance estimation are presented in this contribution.
id cern-1386669
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2011
record_format invenio
spelling cern-13866692019-09-30T06:29:59Zhttp://cds.cern.ch/record/1386669engBertella, CFully hadronic ttbar cross section measurement with ATLAS detectorDetectors and Experimental TechniquesThe top quark pair production cross section in the fully hadronic final state is characterized by a six jet topology, two of which could be identified as originating from a b-quark using ATLAS b-tagging algorithms. Compared to other decay channels, this final state presents an advantageous larger branching ratio; on the other hand it suffers from a very large QCD multi-jet background, generally difficult to estimate from Monte Carlo simulation and therefore evaluated using data-driven techniques. It is essential, to efficiently trigger on these fully hadronic ttbar events, to use dedicated triggers. An overview of the analysis for ttbar production cross section measurement in the fully hadronic final state and the state-of-the-art of the b-jet trigger performance estimation are presented in this contribution.ATL-PHYS-SLIDE-2011-609oai:cds.cern.ch:13866692011-09-30
spellingShingle Detectors and Experimental Techniques
Bertella, C
Fully hadronic ttbar cross section measurement with ATLAS detector
title Fully hadronic ttbar cross section measurement with ATLAS detector
title_full Fully hadronic ttbar cross section measurement with ATLAS detector
title_fullStr Fully hadronic ttbar cross section measurement with ATLAS detector
title_full_unstemmed Fully hadronic ttbar cross section measurement with ATLAS detector
title_short Fully hadronic ttbar cross section measurement with ATLAS detector
title_sort fully hadronic ttbar cross section measurement with atlas detector
topic Detectors and Experimental Techniques
url http://cds.cern.ch/record/1386669
work_keys_str_mv AT bertellac fullyhadronicttbarcrosssectionmeasurementwithatlasdetector