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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
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0002-8913-0981
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Number of Authors: 2859
2016 (English)In: Physical Review D, ISSN 1550-7998, E-ISSN 1550-2368, Vol. 93, no 3, 032009Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
American Physical Society , 2016. Vol. 93, no 3, 032009
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Physical Sciences
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URN: urn:nbn:se:kth:diva-187916DOI: 10.1103/PhysRevD.93.032009ScopusID: 2-s2.0-84960481505OAI: oai:DiVA.org:kth-187916DiVA: diva2:932388
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QC 20160601

Available from: 2016-06-01 Created: 2016-06-01 Last updated: 2016-06-01Bibliographically approved

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Lund-Jensen, BengtSidebo, EdvinStrandberg, Jonas
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