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Differential top-antitop cross-section measurements as a function of observables constructed from final-state particles using pp collisions at $\sqrt{s}=7$ TeV in the ATLAS detector

The ATLAS collaboration
JHEP 1506 (2015) 100, 2015

Abstract (data abstract)
CERN-LHC. Various differential cross-sections are measured in top-quark pair ($t\bar{t}$) events produced in proton-proton collisions at a centre-of-mass energy of $\sqrt{s} = 7$ TeV at the LHC with the ATLAS detector. These differential cross-sections are presented in a data set corresponding to an integrated luminosity of $4.6$ fb$^{-1}$. The differential cross-sections are presented in terms of kinematic variables of a top-quark proxy referred to as the pseudo-top-quark whose dependence on theoretical models is minimal. The pseudo-top-quark can be defined in terms of either reconstructed detector objects or stable particles in an analogous way. The measurements are performed on $t\bar{t}$ events in the lepton+jets channel, requiring exactly one charged lepton and at least four jets with at least two of them tagged as originating from a $b$-quark. The hadronic and leptonic pseudo-top-quarks are defined via the leptonic or hadronic decay mode of the $W$ boson produced by the top-quark decay in events with a single charged lepton. The cross-section is measured as a function of the transverse momentum and rapidity of both the hadronic and leptonic pseudo-top-quark as well as the transverse momentum, rapidity and invariant mass of the pseudo-top-quark pair system. The measurements are corrected for detector effects and are presented within a kinematic range that closely matches the detector acceptance. Differential cross-section measurements of the pseudo-top-quark variables are compared with several Monte Carlo models that implement next-to-leading order or leading-order multi-leg matrix-element calculations.

  • Table 1

    Data from Table 1 of the auxiliary material

    10.17182/hepdata.77064.v1/t1

    Measured $t\bar{t}$ differential cross-section and relative uncertainty as a function of the hadronic pseudo-top-quark $p_{\mathrm{T}}(\hat{t}_{\mathrm{h}})$in the muon channel. The results...

  • Table 2

    Data from Table 2 of the auxiliary material

    10.17182/hepdata.77064.v1/t2

    Measured $t\bar{t}$ differential cross-section and relative uncertainty as a function of the hadronic pseudo-top-quark $p_{\mathrm{T}}(\hat{t}_{\mathrm{h}})$ in the electron channel. The...

  • Table 3

    Data from Table 3 of the auxiliary material

    10.17182/hepdata.77064.v1/t3

    Measured $t\bar{t}$ differential cross-section and relative uncertainty as a function of the hadronic pseudo-top-quark $|y(\hat{t}_{\mathrm{h}})|$ in the muon channel. The...

  • Table 4

    Data from Table 4 of the auxiliary material

    10.17182/hepdata.77064.v1/t4

    Measured $t\bar{t}$ differential cross-section and relative uncertainty as a function of the hadronic pseudo-top-quark $|y(\hat{t}_{\mathrm{h}})|$ in the electron channel. The...

  • Table 5

    Data from Table 5 of the auxiliary material

    10.17182/hepdata.77064.v1/t5

    Measured $t\bar{t}$ differential cross-section and relative uncertainty as a function of the leptonic pseudo-top-quark $p_{\mathrm{T}}(\hat{t}_{\mathrm{l}})$ in the muon channel. The...

  • Table 6

    Data from Table 6 of the auxiliary material

    10.17182/hepdata.77064.v1/t6

    Measured $t\bar{t}$ differential cross-section and relative uncertainty as a function of the leptonic pseudo-top-quark $p_{\mathrm{T}}(\hat{t}_{\mathrm{l}})$ in the electron channel. The...

  • Table 7

    Data from Table 7 of the auxiliary material

    10.17182/hepdata.77064.v1/t7

    Measured $t\bar{t}$ differential cross-section and relative uncertainty as a function of the leptonic pseudo-top-quark $|y(\hat{t}_{\mathrm{l}})|$ in the muon channel. The...

  • Table 8

    Data from Table 8 of the auxiliary material

    10.17182/hepdata.77064.v1/t8

    Measured $t\bar{t}$ differential cross-section and relative uncertainty as a function of the leptonic pseudo-top-quark $|y(\hat{t}_{\mathrm{l}})|$ in the electron channel. The...

  • Table 9

    Data from Table 9 of the auxiliary material

    10.17182/hepdata.77064.v1/t9

    Measured $t\bar{t}$ differential cross-section and relative uncertainty as a function of the pseudo-top-quark-pair $p_{\mathrm{T}}(\hat{t}_{\mathrm{l}}\hat{t}_{\mathrm{h}})$ in the muon channel.The results shown...

  • Table 10

    Data from Table 10 of the auxiliary material

    10.17182/hepdata.77064.v1/t10

    Measured $t\bar{t}$ differential cross-section and relative uncertainty as a function of the pseudo-top-quark-pair $p_{\mathrm{T}}(\hat{t}_{\mathrm{l}}\hat{t}_{\mathrm{h}})$ in the electron channel. The results...

  • Table 11

    Data from Table 11 of the auxiliary material

    10.17182/hepdata.77064.v1/t11

    Measured $t\bar{t}$ differential cross-section and relative uncertainty as a function of the pseudo-top-quark-pair $|y(\hat{t}_{\mathrm{l}}\hat{t}_{\mathrm{h}})|$ in the muon channel. The results...

  • Table 12

    Data from Table 12 of the auxiliary material

    10.17182/hepdata.77064.v1/t12

    Measured $t\bar{t}$ differential cross-section and relative uncertainty as a function of the pseudo-top-quark-pair $|y(\hat{t}_{\mathrm{l}}\hat{t}_{\mathrm{h}})|$ in the electron channel. The results...

  • Table 13

    Data from Table 13 of the auxiliary material

    10.17182/hepdata.77064.v1/t13

    Measured $t\bar{t}$ differential cross-section and relative uncertainty as a function of the pseudo-top-quark-pair $m(\hat{t}_{\mathrm{l}}\hat{t}_{\mathrm{h}})$ in the muon channel. The results...

  • Table 14

    Data from Table 14 of the auxiliary material

    10.17182/hepdata.77064.v1/t14

    Measured $t\bar{t}$ differential cross-section and relative uncertainty as a function of the pseudo-top-quark-pair $m(\hat{t}_{\mathrm{l}}\hat{t}_{\mathrm{h}})$ in the electron channel. The results...

  • Table 15

    Data from Table 15 of the auxiliary material and the data points in figures 8a and 11a in the corresponding paper

    10.17182/hepdata.77064.v1/t15

    Measured $t\bar{t}$ differential cross-section and relative uncertainty as a function of the hadronic pseudo-top-quark $p_{\mathrm{T}}(\hat{t}_{\mathrm{h}})$ after the electron and muon...

  • Table 16

    Data from Table 16 of the auxiliary material and the data points in figures 9a and 12a in the corresponding paper

    10.17182/hepdata.77064.v1/t16

    Measured $t\bar{t}$ differential cross-section and relative uncertainty as a function of the hadronic pseudo-top-quark $|y(\hat{t}_{\mathrm{h}})|$ after the electron and muon...

  • Table 17

    Data from Table 17 of the auxiliary material and the data points in figures 8b and 11b in the corresponding paper

    10.17182/hepdata.77064.v1/t17

    Measured $t\bar{t}$ differential cross-section and relative uncertainty as a function of theleptonic pseudo-top-quark $p_{\mathrm{T}}(\hat{t}_{\mathrm{l}})$ after the electron and muon channel...

  • Table 18

    Data from Table 18 of the auxiliary material and the data points in figures 9b and 12b in the corresponding paper

    10.17182/hepdata.77064.v1/t18

    Measured $t\bar{t}$ differential cross-section and relative uncertaintyas a function of the leptonic pseudo-top-quark $|y(\hat{t}_{\mathrm{l}})|$ after the electron and muon channel...

  • Table 19

    Data from Table 19 of the auxiliary material and the data points in figures 10a and 13a in the corresponding paper

    10.17182/hepdata.77064.v1/t19

    Measured $t\bar{t}$ differential cross-section and relative uncertainty as a function ofthe pseudo-top-quark-pair $p_{\mathrm{T}}(\hat{t}_{\mathrm{l}}\hat{t}_{\mathrm{h}})$ after the electron and muon channel combination.The...

  • Table 20

    Data from Table 20 of the auxiliary material and the data points in figures 10b and 13b in the corresponding paper

    10.17182/hepdata.77064.v1/t20

    Measured $t\bar{t}$ differential cross-section and relative uncertainty as a function of the pseudo-top-quark-pair $|y(\hat{t}_{\mathrm{l}}\hat{t}_{\mathrm{h}})|$ after the electron and muon channel...

  • Table 21

    Data from Table 21 of the auxiliary material and the data points in figures 10c and 13c in the corresponding paper

    10.17182/hepdata.77064.v1/t21

    Measured $t\bar{t}$ differential cross-section and relative uncertainty as a function of the pseudo-top-quark-pair $m(\hat{t}_{\mathrm{l}}\hat{t}_{\mathrm{h}})$after the electron and muon channel combination....

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