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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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Lenguaje: | eng |
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2011
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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 |