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
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
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
IdentifiersURN: urn:nbn:se:kth:diva-187916DOI: 10.1103/PhysRevD.93.032009ScopusID: 2-s2.0-84960481505OAI: oai:DiVA.org:kth-187916DiVA: diva2:932388
QC 201606012016-06-012016-06-012016-06-01Bibliographically approved