Measurement of the top quark-pair production cross section with ATLAS in pp collisions at √s = 7 TeV

A measurement of the production cross-section for top quark pairs (tt̅) in pp collisions at √s =7 TeVis presented using data recorded with the ATLAS detector at the Large Hadron Collider. Events are selected in two different topologies: single lepton (electron e or muon μ) with large missing transve...

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Autor principal: Multitudinario:3078
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_14346044_v71_n3_p_Multitudinario
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_14346044_v71_n3_p_Multitudinario
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spelling todo:paper_14346044_v71_n3_p_Multitudinario2023-10-03T16:14:42Z Measurement of the top quark-pair production cross section with ATLAS in pp collisions at √s = 7 TeV Multitudinario:3078 A measurement of the production cross-section for top quark pairs (tt̅) in pp collisions at √s =7 TeVis presented using data recorded with the ATLAS detector at the Large Hadron Collider. Events are selected in two different topologies: single lepton (electron e or muon μ) with large missing transverse energy and at least four jets, and dilepton (ee, μμ or eμ) with large missing transverse energy and at least two jets. In a data sample of 2.9 pb –1 , 37 candidate events are observed in the single-lepton topology and 9 events in the dilepton topology. The corresponding expected backgrounds from non-tt̅ Standard Model processes are estimated using data-driven methods and determined to be 12.2 ± 3.9 events and 2.5± 0.6 events, respectively. The kinematic properties of the selected events are consistent with SM tt̅ production. The inclusive top quark pair production cross-section is measured to be The measurement agrees with perturbative QCD calculations. © CERN for the benefit of the ATLAS collaboration 2011. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_14346044_v71_n3_p_Multitudinario
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description A measurement of the production cross-section for top quark pairs (tt̅) in pp collisions at √s =7 TeVis presented using data recorded with the ATLAS detector at the Large Hadron Collider. Events are selected in two different topologies: single lepton (electron e or muon μ) with large missing transverse energy and at least four jets, and dilepton (ee, μμ or eμ) with large missing transverse energy and at least two jets. In a data sample of 2.9 pb –1 , 37 candidate events are observed in the single-lepton topology and 9 events in the dilepton topology. The corresponding expected backgrounds from non-tt̅ Standard Model processes are estimated using data-driven methods and determined to be 12.2 ± 3.9 events and 2.5± 0.6 events, respectively. The kinematic properties of the selected events are consistent with SM tt̅ production. The inclusive top quark pair production cross-section is measured to be The measurement agrees with perturbative QCD calculations. © CERN for the benefit of the ATLAS collaboration 2011.
format JOUR
author Multitudinario:3078
spellingShingle Multitudinario:3078
Measurement of the top quark-pair production cross section with ATLAS in pp collisions at √s = 7 TeV
author_facet Multitudinario:3078
author_sort Multitudinario:3078
title Measurement of the top quark-pair production cross section with ATLAS in pp collisions at √s = 7 TeV
title_short Measurement of the top quark-pair production cross section with ATLAS in pp collisions at √s = 7 TeV
title_full Measurement of the top quark-pair production cross section with ATLAS in pp collisions at √s = 7 TeV
title_fullStr Measurement of the top quark-pair production cross section with ATLAS in pp collisions at √s = 7 TeV
title_full_unstemmed Measurement of the top quark-pair production cross section with ATLAS in pp collisions at √s = 7 TeV
title_sort measurement of the top quark-pair production cross section with atlas in pp collisions at √s = 7 tev
url http://hdl.handle.net/20.500.12110/paper_14346044_v71_n3_p_Multitudinario
work_keys_str_mv AT multitudinario3078 measurementofthetopquarkpairproductioncrosssectionwithatlasinppcollisionsats7tev
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