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

Barton, Adam Edward and Beattie, Michael and Borissov, Guennadi and Bouhova-Thacker, Evelina Vassileva and Dearnaley, William and Fox, Harald and Grimm, Kathryn Ann Tschann and Henderson, Robert Charles William and Hughes, Gareth and Jones, Roger William Lewis and Kartvelishvili, Vakhtang and Long, Robin Eamonn and Love, Peter Allan and Skinner, Malcolm and Smizanska, Maria and Walder, James William and Wharton, Andy (2016) 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. ISSN 1550-7998

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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−1 of proton-proton collisions at a center-of-mass energy of 8 TeV. The measurement is performed for tt¯ 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-kt 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.

Item Type: Journal Article
Journal or Publication Title: Physical Review D
Departments: Faculty of Science and Technology > Physics
ID Code: 81042
Deposited By: ep_importer_pure
Deposited On: 18 Aug 2016 08:42
Refereed?: Yes
Published?: Published
Last Modified: 23 Oct 2019 05:46
URI: https://eprints.lancs.ac.uk/id/eprint/81042

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