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

Contributors

ATLAS Collaboration

Collaborators

Abdelalim Aly, Ahmed Aly; Alexandre, Gauthier; Backes, Moritz; Bell, Paul; Bell, William; Berglund, Frida Elina; Blondel, Alain; Bucci, Francesca; Clark, Allan Geoffrey; Dao, Valerio; Diaz-Gomez, Manuel; Efthymiopoulos, Ilias; Ferrere, Didier; Gadomski, Szymon; Garcia Navarro, Jose Enrique; Gaumer, Olivier; Gonzalez Sevilla, Sergio; Goulette, Marc; Hamilton, Andrew; Leger, Annie; Lister, Alison; Macina-Buono, Daniela; Mangin-Brinet, Mariane; Martin Dit Latour, Bertrand; Mikulec, Bettina; Moneta, Lorenzo; Mora Herrera, Maria Clemencia Rosario; Morone, Maria Cristina; Nektarijevic, Snezana; Orellana, Frédérik; Pasztor, Arpad; Pohl, Martin; Robichaud-Veronneau, Andrée; Rosselet, Laurent; Urquijo, Phillip; Wu, Xin

Published in

European physical journal. C, Particles and fields, vol. 71, no. 1577, 36

Publication date

2011

Abstract

A measurement of the production cross-section for top quark pairs (tt) 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- tt 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 tt production. The inclusive top quark pair production cross-section is measured to be σt=145±31(stat.)+42−27(syst.) pb. The measurement agrees with perturbative QCD calculations.

UNIGE affiliation entities

Citation (ISO format)

ATLAS Collaboration. Measurement of the top quark-pair production cross section with ATLAS in pp collisions at √s=7 TeV. In: European physical journal. C, Particles and fields, 2011, vol. 71, n° 1577, p. 36. doi: 10.1140/epjc/s10052-011-1577-6

Main files (1)

Article (Published version)

Identifiers

Additional URL for this publication

http://link.springer.com/article/10.1140%2Fepjc%2Fs10052-011-1577-6

Journal ISSN

1434-6044
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273downloads

Technical informations

Creation

07/11/2014 09:30:00

First validation

07/11/2014 09:30:00

Update

13/10/2025 22:16:05

Status update

14/03/2023 22:13:19

Last indexation

10/11/2026 17:11:23
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