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 (t¯t) in pp collisions at √ s =7 TeV is 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 trans...
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2011
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Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/78660 |
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I19-R120-10915-78660 |
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institution |
Universidad Nacional de La Plata |
institution_str |
I-19 |
repository_str |
R-120 |
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SEDICI (UNLP) |
language |
Inglés |
topic |
Ciencias Exactas Física proton-proton collisions ATLAS detector lepton dilepton |
spellingShingle |
Ciencias Exactas Física proton-proton collisions ATLAS detector lepton dilepton Anduaga, Xabier Sebastián Dova, María Teresa Monticelli, Fernando Gabriel Tripiana, Martín F. The ATLAS Collaboration Measurement of the top quark-pair production cross section with ATLAS in pp collisions at √ s = 7 TeV |
topic_facet |
Ciencias Exactas Física proton-proton collisions ATLAS detector lepton dilepton |
description |
A measurement of the production cross-section for top quark pairs (t¯t) in pp collisions at √ s =7 TeV is 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-t¯t 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 t¯t production. The inclusive top quark pair production cross-section is measured to be σt¯t = 145±31(stat.) +42 −27(syst.) pb.
The measurement agrees with perturbative QCD calculations. |
format |
Articulo Articulo |
author |
Anduaga, Xabier Sebastián Dova, María Teresa Monticelli, Fernando Gabriel Tripiana, Martín F. The ATLAS Collaboration |
author_facet |
Anduaga, Xabier Sebastián Dova, María Teresa Monticelli, Fernando Gabriel Tripiana, Martín F. The ATLAS Collaboration |
author_sort |
Anduaga, Xabier Sebastián |
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 |
publishDate |
2011 |
url |
http://sedici.unlp.edu.ar/handle/10915/78660 |
work_keys_str_mv |
AT anduagaxabiersebastian measurementofthetopquarkpairproductioncrosssectionwithatlasinppcollisionsats7tev AT dovamariateresa measurementofthetopquarkpairproductioncrosssectionwithatlasinppcollisionsats7tev AT monticellifernandogabriel measurementofthetopquarkpairproductioncrosssectionwithatlasinppcollisionsats7tev AT tripianamartinf measurementofthetopquarkpairproductioncrosssectionwithatlasinppcollisionsats7tev AT theatlascollaboration measurementofthetopquarkpairproductioncrosssectionwithatlasinppcollisionsats7tev |
bdutipo_str |
Repositorios |
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1764820486440615936 |