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

The ATLAS collaboration

研究成果: 雜誌貢獻期刊論文同行評審

191 引文 斯高帕斯(Scopus)

摘要

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.

原文???core.languages.en_GB???
文章編號1577
期刊European Physical Journal C
71
發行號3
DOIs
出版狀態已出版 - 2011

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