High Energy Physics - Experiment
[Submitted on 13 Oct 2015 (v1), last revised 2 Mar 2016 (this version, v3)]
Title:Measurement of the differential cross-section of highly boosted top quarks as a function of their transverse momentum in $\sqrt{s}$ = 8 TeV proton-proton collisions using the ATLAS detector
View PDFAbstract: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 $t\bar{t}$ 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.
Submission history
From: Atlas Publications [view email][v1] Tue, 13 Oct 2015 18:58:07 UTC (570 KB)
[v2] Wed, 14 Oct 2015 15:19:59 UTC (575 KB)
[v3] Wed, 2 Mar 2016 10:24:25 UTC (575 KB)
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