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Measurement of the differential cross-section of highly boosted top quarks as a function of their transverse momentum in √s=8  TeV proton-proton collisions using the ATLAS detector

Author(s)
ATLAS Collaboration; Taylor, Frank E
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Abstract
The differential cross-section for pair production of top quarks with high transverse momentum is measured in 20.3  fb[superscript −1] of proton-proton collisions at a center-of-mass energy of 8 TeV. The measurement is performed for t[t with a line over it] events in the lepton+jets channel. The cross-section is reported as a function of the hadronically decaying top quark transverse momentum for values above 300 GeV. The hadronically decaying top quark is reconstructed as an anti-k[subscript t] jet with radius parameter R=1.0 and identified with jet substructure techniques. The observed yield is corrected for detector effects to obtain a cross-section at particle level in a fiducial region close to the event selection. A parton-level cross-section extrapolated to the full phase space is also reported for top quarks with transverse momentum above 300 GeV. The predictions of a majority of next-to-leading-order and leading-order matrix-element Monte Carlo generators are found to agree with the measured cross-sections.
Date issued
2016-02
URI
http://hdl.handle.net/1721.1/111206
Department
Massachusetts Institute of Technology. Department of Physics
Journal
Physical Review D
Publisher
American Physical Society
Citation
Aad, G. et al. "Measurement of the differential cross-section of highly boosted top quarks as a function of their transverse momentum in √s=8  TeV proton-proton collisions using the ATLAS detector." Physical Review D 93, 3 (February 2016): 032009 © 2016 CERN, for the ATLAS Collaboration
Version: Final published version
ISSN
2470-0010
2470-0029

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