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

ATLAS Collaboration

doi:10.1103/PhysRevD.93.032009

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

ATLAS Collaboration

Physics and Astronomy

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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 $t\bar{t}$ 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.

Original language	English
Article number	032009
Journal	Physical Review D
DOIs	https://doi.org/10.1103/PhysRevD.93.032009
Publication status	Published - 13 Oct 2015

Bibliographical note

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/

Keywords

hep-ex

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Cite this

@article{a1cac0d59bcb46dab197ea84779d3723,

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",

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.",

keywords = "hep-ex",

author = "{ATLAS Collaboration} and Paul Newman and Philip Allport and {Aperio Bella}, Ludovica and Matthew Baca and Juraj Bracinik and David Charlton and Andrew Chisholm and Andrew Daniells and Grzegorz Gach and Christopher Hawkes and Simon Head and Stephen Hillier and Mark Levy and Mark Slater and Richard Mudd and {Murillo Quijada}, Javier and Konstantinos Nikolopoulos and Rhys Owen and Jurgen Thomas and Paul Thompson and Alan Watson and Miriam Watson and John Wilson",

note = "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/",

year = "2015",

month = oct,

day = "13",

doi = "10.1103/PhysRevD.93.032009",

language = "English",

journal = "Physical Review D",

issn = "1550-7998",

publisher = "American Physical Society (APS)",

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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

JF - Physical Review D

M1 - 032009

ER -

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

Bibliographical note

Keywords

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