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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Autores principales: Anduaga, Xabier Sebastián, Dova, María Teresa, Monticelli, Fernando Gabriel, Tripiana, Martín F., The ATLAS Collaboration
Formato: Articulo
Lenguaje:Inglés
Publicado: 2011
Materias:
Ciencias Exactas
Física
proton-proton collisions
ATLAS detector
lepton
dilepton
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/78660
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-78660
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection 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
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