Measurement of the differential cross-section of highly boosted top quarks as a function of their transverse momentum in root s=8 TeV proton-proton collisions using the ATLAS detector
Number of Authors: 2874
2016 (English)In: Physical Review D, ISSN 2470-0010, 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 t (t) over bar 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(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.
Place, publisher, year, edition, pages
2016. Vol. 93, no 3, 032009
IdentifiersURN: urn:nbn:se:su:diva-136154DOI: 10.1103/PhysRevD.93.032009ISI: 000385749200001OAI: oai:DiVA.org:su-136154DiVA: diva2:1050765