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Measurement of the top pair production cross section in 8 TeV proton-proton collisions using kinematic information in the lepton + jets final state with ATLAS

Author(s)
Taylor, Frank E.
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Abstract
A measurement is presented of the t[bar over t] inclusive production cross section in pp collisions at a center-of-mass energy of √s = 8  TeV using data collected by the ATLAS detector at the CERN Large Hadron Collider. The measurement was performed in the lepton + jets final state using a data set corresponding to an integrated luminosity of 20.3  fb[superscript −1]. The cross section was obtained using a likelihood discriminant fit and b-jet identification was used to improve the signal-to-background ratio. The inclusive t[bar over t] production cross section was measured to be 260 ± 1(stat)[+22 over −23](stat) ± 8(lumi) ± 4(beam)  pb assuming a top-quark mass of 172.5 GeV, in good agreement with the theoretical prediction of 253[+13 over −15]  pb. The t[bar over t] → (e,μ) + jets production cross section in the fiducial region determined by the detector acceptance is also reported.
Date issued
2015-06
URI
http://hdl.handle.net/1721.1/98516
Department
Massachusetts Institute of Technology. Department of Physics
Journal
Physical Review D
Publisher
American Physical Society
Citation
Aad, G., B. Abbott, J. Abdallah, S. Abdel Khalek, O. Abdinov, R. Aben, B. Abi, et al. “Measurement of the Top Pair Production Cross Section in 8 TeV Proton-Proton Collisions Using Kinematic Information in the Lepton + Jets Final State with ATLAS.” Phys. Rev. D 91, no. 11 (June 2015). © 2015 CERN, for the ATLAS Collaboration
Version: Final published version
ISSN
1550-7998
1550-2368

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