# 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

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 $t\bar{t}$ 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.
Type de document :
Article dans une revue
Physical Review D, American Physical Society, 2016, 93, pp.032009 〈10.1103/PhysRevD.93.032009〉

http://hal.in2p3.fr/in2p3-01215347
Contributeur : Emmanuelle Vernay <>
Soumis le : mercredi 14 octobre 2015 - 07:47:51
Dernière modification le : mercredi 16 mai 2018 - 15:10:07

### Citation

G. Aad, S. Albrand, J. Collot, S. Crépé-Renaudin, P.A. Delsart, et al.. 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. Physical Review D, American Physical Society, 2016, 93, pp.032009 〈10.1103/PhysRevD.93.032009〉. 〈in2p3-01215347〉

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