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

The ATLAS collaboration, B. Budick, K. Cranmer, A. Haas, A. I. Mincer, P. Nemethy

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish (US)
Article number1577
JournalEuropean Physical Journal C
Volume71
Issue number3
DOIs
StatePublished - 2011

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pair production
Topology
quarks
collisions
cross sections
topology
Colliding beam accelerators
leptons
Kinematics
Detectors
Electrons
muons
kinematics
quantum chromodynamics
energy
detectors
electrons

ASJC Scopus subject areas

  • Engineering (miscellaneous)
  • Physics and Astronomy (miscellaneous)

Cite this

Measurement of the top quark-pair production cross section with ATLAS in pp collisions at √s = 7 TeV. / The ATLAS collaboration; Budick, B.; Cranmer, K.; Haas, A.; Mincer, A. I.; Nemethy, P.

In: European Physical Journal C, Vol. 71, No. 3, 1577, 2011.

Research output: Contribution to journalArticle

The ATLAS collaboration ; Budick, B. ; Cranmer, K. ; Haas, A. ; Mincer, A. I. ; Nemethy, P. / Measurement of the top quark-pair production cross section with ATLAS in pp collisions at √s = 7 TeV. In: European Physical Journal C. 2011 ; Vol. 71, No. 3.
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