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

, The ATLAS collaboration (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
ID Code:
81042
Deposited By:
Deposited On:
18 Aug 2016 08:42
Refereed?:
Yes
Published?:
Published
Last Modified:
23 Jun 2021 07:30