TY - JOUR
T1 - 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
AU - ATLAS Collaboration
AU - Newman, Paul
AU - Allport, Philip
AU - Aperio Bella, Ludovica
AU - Baca, Matthew
AU - Bracinik, Juraj
AU - Charlton, David
AU - Chisholm, Andrew
AU - Daniells, Andrew
AU - Gach, Grzegorz
AU - Hawkes, Christopher
AU - Head, Simon
AU - Hillier, Stephen
AU - Levy, Mark
AU - Slater, Mark
AU - Mudd, Richard
AU - Murillo Quijada, Javier
AU - Nikolopoulos, Konstantinos
AU - Owen, Rhys
AU - Thomas, Jurgen
AU - Thompson, Paul
AU - Watson, Alan
AU - Watson, Miriam
AU - Wilson, John
N1 - 34 pages plus author list (51 pages total), 10 figures, 8 tables, published version, all figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2014-15/
PY - 2015/10/13
Y1 - 2015/10/13
N2 - 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.
AB - 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.
KW - hep-ex
U2 - 10.1103/PhysRevD.93.032009
DO - 10.1103/PhysRevD.93.032009
M3 - Article
SN - 1550-7998
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
M1 - 032009
ER -