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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

The ATLAS collaboration
Phys.Rev. D93 (2016) 032009, 2016

Abstract (data abstract)
CERN-LHC. Measurement of the differential cross-section for pair production of top quarks with high transverse momentum ($p_T$), with respect to the transverse momentum of the top quark, obtained using the lepton+jets channel. 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 measurement is obtained using 20.3 fb-1 of proton--proton collisions at a center-of-mass energy of 8 TeV and is corrected at both particle-level, in a fiducial region close to the event selection, and at parton-level, for events with top quarks with $p_T$ > 300 GeV. The fiducial region is defined as (see also Table 1 of the paper): - Exactly one lepton (e or mu) - p_T(lepton) > 25 GeV and |eta(lepton)| < 2.5 - p_T(anti-kt R=0.4 jets) > 25 GeV and |eta(anti-kt R=0.4 jets)| < 2.5 - MET > 20 GeV and MET+MTW > 60 GeV (MTW is the transverse mass between the lepton and the MET) - at least one anti-kt R=0.4 jets within Delta-R < 1.5 from the lepton - at least one anti-kt R=1.0 jets with p_T > 300 GeV, mass > 100 GeV, sqrt(d_12) > 40 GeV (sqrt(d_12) is the first splitting scale) - $\Delta R$(anti-kt R=1.0 jet, anti-kt R=0.4 jet) > 1.5 and $\Delta \phi$(anti-kt R=1.0 jet, lepton) > 2.3 - At least one of the anti-kt R=0.4 jets is b-tagged among: (a) the leading jet within $\Delta R$ < 1.5 from the lepton; (b) one jet within $\Delta R$ < 1.0 from anti-kt R=1.0 jet axis.

  • Table 1

    Data from Table 4

    10.17182/hepdata.18108.v1/t1

    Fiducial particle-level differential cross-section, with statistical and systematic uncertainties, as a function of the top-jet candidate p_T.

  • Table 2

    Data from Table 5

    10.17182/hepdata.18108.v1/t2

    Parton-level differential cross-section, with statistical and systematic uncertainties, as a function of the hadronically decaying top quark p_T.

  • Table 3

    Data from Table 7

    10.17182/hepdata.18108.v1/t3

    The individual systematic uncertainties calculated as a percentage of the particle-level differential cross-section $d\sigma_{tt} / d p_{T,ptcl}$ in each bin....

  • Table 4

    Data from Table 8

    10.17182/hepdata.18108.v1/t4

    The individual systematic uncertainties calculated as a percentage of the parton-level differential cross-section $d\sigma_{tt} / d p_{T,parton}$ in each bin....

  • Table 5

    Data from Table 1 Auxiliary

    10.17182/hepdata.18108.v1/t5

    Covariance matrix for the particle-level differential cross-section. The elements of the covariance matrix are in units of ab^2/GeV^2.

  • Table 6

    Data from Table 4 Auxiliary

    10.17182/hepdata.18108.v1/t6

    Covariance matrix for the parton-level differential cross-section. The elements of the covariance matrix are in units of ab^2/GeV^2.

  • Table 7

    Data from Table 3

    10.17182/hepdata.18108.v1/t7

    Correlation matrix between the bins of the particle-level differential cross-section as a function of $p_{T,ptcl}$.

  • Table 8

    Data from Table 3 Auxiliary

    10.17182/hepdata.18108.v1/t8

    Correlation matrix between the bins of the parton-level differential cross-section as a function of $p_{T,parton}$.

  • Table 9

    Data from Table 2 Auxiliary

    10.17182/hepdata.18108.v1/t9

    Correlation matrix of the data statistical uncertainty of the particle-level differential cross-section.

  • Table 10

    Data from Table 5 Auxiliary

    10.17182/hepdata.18108.v1/t10

    Correlation matrix of the data statistical uncertainty of the parton-level differential cross-section.

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