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Fiducial, total and differential cross-section measurements of $t$-channel single top-quark production in $pp$ collisions at 8 TeV using data collected by the ATLAS detector

The ATLAS collaboration
Eur.Phys.J.C 77 (2017) 531, 2017.

Abstract (data abstract)
- CERN-LHC. Detailed measurements of $t$-channel single top-quark production are presented. They use $20.2~\mathrm{fb}^{-1}$ of data collected by the ATLAS experiment in proton--proton collisions at a centre-of-mass energy of 8 TeV at the LHC. Total, fiducial and differential cross-sections are measured for both top-quark and top-antiquark production. The fiducial cross-section is measured with a precision of $5.8~\%$ (top quark) and $7.8~\%$ (top antiquark), respectively. The total cross-sections are measured to be $\sigma_\mathrm{tot}(tq) = 56.7^{+4.3}_{-3.8}\;\mathrm{pb}$ for top-quark production and $\sigma_\mathrm{tot}(\bar{t} q) = 32.9^{+3.0}_{-2.7}\;\mathrm{pb}$ for top-antiquark production, in agreement with the Standard Model prediction. In addition, the ratio of top-quark to top-antiquark production cross-sections is determined to be $R_t=1.72 \pm 0.09$. The differential cross-sections as a function of the transverse momentum and rapidity of both the top quark and the top antiquark are measured at both the parton and particle levels. The transverse momentum and rapidity differential cross-sections of the accompanying jet from the $t$-channel scattering are measured at particle level. All measurements are compared to various Monte Carlo predictions as well as to fixed-order QCD calculations where available.

  • Table 1

    Table 1 on page 8 of the paper.

    10.17182/hepdata.82544.v2/t1

    Predicted and observed event yields for the signal region (SR). The multijet background prediction is obtained from a binned maximum-likelihood...

  • Table 2

    Section 7.2 of the paper.

    10.17182/hepdata.82544.v2/t2

    Definition of the fiducial phase space.

  • Table 3

    Table 2 on page 9 of the paper.

    10.17182/hepdata.82544.v2/t3

    The seven input variables to the NN ordered by their discriminating power. The jet that is not $b$-tagged is referred...

  • Table 4

    Table 3 on page 12 of the paper.

    10.17182/hepdata.82544.v2/t4

    Event yields for the different processes estimated with the fit to the $O_\mathrm{NN}$ distribution compared to the numbers of observed...

  • Table 5

    Equations (8) and (9) on page 12 of the paper.

    10.17182/hepdata.82544.v2/t5

  • Table 6

    Table 5 on page 15 of the paper.

    10.17182/hepdata.82544.v2/t6

    Detailed list of the contribution from each source of uncertainty to the total uncertainty in the measured values of $\sigma_{\mathrm{fid}}(tq)$...

  • Table 7

    Main text on page 15 of the paper.

    10.17182/hepdata.82544.v2/t7

  • Table 8

    Equations (10), (11) and (12) on page 15, equation (13) on page 16 and equation (15) on page 17 of the paper.

    10.17182/hepdata.82544.v2/t8

  • Table 9

    Table 5 on page 17 of the paper.

    10.17182/hepdata.82544.v2/t9

    Significant contributions to the total relative uncertainty in the measured value of $R_{t}$. The estimation of the systematic uncertainties has...

  • Table 10

    Table 6 on page 17 of the paper.

    10.17182/hepdata.82544.v2/t10

    Slopes $a$ of the mass dependence of the measured cross$-$sections.

  • Table 11

    Table 7 on page 18 of the paper.

    10.17182/hepdata.82544.v2/t11

    Predicted (post-fit) and observed event yields for the signal region (SR), after the requirement on the neural network discriminant, $O_{\mathrm{NN}}~>~0.8$....

  • Table 12

    Table 8 on page 18 of the paper.

    10.17182/hepdata.82544.v2/t12

    Predicted (post-fit) and observed event yields for the signal region (SR), after the requirement on the second neural network discriminant,...

  • Table 13

    Figure 16a on page 23 of the paper.

    10.17182/hepdata.82544.v2/t13

    Migration matrix for $p_{\mathrm{T}}(\hat{t\hspace{-0.2mm}})$ at the particle level. The pseudo top quark is shown on the $y$-axis and the reconstructed...

  • Table 14

    Figure 16b on page 23 of the paper.

    10.17182/hepdata.82544.v2/t14

    Migration matrix for $p_{\mathrm{T}}(t)$ at the parton level. The parton-level quark is shown on the $y$-axis and the reconstructed variable...

  • Table 15

    Figure 16c on page 23 of the paper.

    10.17182/hepdata.82544.v2/t15

    Migration matrix for $|y(\hat{t\hspace{-0.2mm}})|$ at the particle level. The pseudo top quark is shown on the $y$-axis and the reconstructed...

  • Table 16

    Figure 16d on page 23 of the paper.

    10.17182/hepdata.82544.v2/t16

    Migration matrix for $|y(t)|$ at the parton level. The parton-level quark is shown on the $y$-axis and the reconstructed variable...

  • Table 17

    Table 9 on page 24 of the paper.

    10.17182/hepdata.82544.v2/t17

    Uncertainties in the normalisations of the different backgrounds for all processes, as derived from the total cross-section measurement.

  • Table 18

    Table 10 on page 25 of the paper.

    10.17182/hepdata.82544.v2/t18

    Absolute and normalised unfolded differential $tq$ production cross$-$section as a function of $p_{\mathrm{T}}(\hat{t\hspace{-0.2mm}})$ at particle level.

  • Table 19

    Table 11 on page 26 of the paper.

    10.17182/hepdata.82544.v2/t19

    Absolute and normalised unfolded differential $\bar tq$ production cross$-$section as a function of $p_{\mathrm{T}}(\hat{t\hspace{-0.2mm}})$ at particle level.

  • Table 20

    Table 12 on page 26 of the paper.

    10.17182/hepdata.82544.v2/t20

    Absolute and normalised unfolded differential $tq$ production cross$-$section as a function of $|y(\hat{t\hspace{-0.2mm}})|$ at particle level.

  • Table 21

    Table 13 on page 26 of the paper.

    10.17182/hepdata.82544.v2/t21

    Absolute and normalised unfolded differential $\bar tq$ production cross$-$section as a function of $|y(\hat{t\hspace{-0.2mm}})|$ at particle level.

  • Table 22

    Table 14 on page 27 of the paper.

    10.17182/hepdata.82544.v2/t22

    Absolute and normalised unfolded differential $tq$ production cross$-$section as a function of $p_{\mathrm{T}}(\hat{j\hspace{-0.2mm}})$ at particle level.

  • Table 23

    Table 15 on page 27 of the paper.

    10.17182/hepdata.82544.v2/t23

    Absolute and normalised unfolded differential $\bar tq$ production cross$-$section as a function of $p_{\mathrm{T}}(\hat{j\hspace{-0.2mm}})$ at particle level.

  • Table 24

    Table 16 on page 28 of the paper.

    10.17182/hepdata.82544.v2/t24

    Absolute and normalised unfolded differential $tq$ production cross$-$section as a function of $|y(\hat{j\hspace{-0.2mm}})|$ at particle level.

  • Table 25

    Table 17 on page 28 of the paper.

    10.17182/hepdata.82544.v2/t25

    Absolute and normalised unfolded differential $\bar tq$ production cross$-$section as a function of $|y(\hat{j\hspace{-0.2mm}})|$ at particle level.

  • Table 26

    Table 18 on page 29 of the paper.

    10.17182/hepdata.82544.v2/t26

    Absolute and normalised unfolded differential $tq$ production cross$-$section as a function of $p_{\mathrm{T}}(t)$ at parton level.

  • Table 27

    Table 19 on page 29 of the paper.

    10.17182/hepdata.82544.v2/t27

    Absolute and normalised unfolded differential $\bar tq$ production cross$-$section as a function of $p_{\mathrm{T}}(t)$ at parton level.

  • Table 28

    Table 20 on page 30 of the paper.

    10.17182/hepdata.82544.v2/t28

    Absolute and normalised unfolded differential $tq$ production cross$-$section as a function of $|y(t)|$ at parton level.

  • Table 29

    Table 21 on page 30 of the paper.

    10.17182/hepdata.82544.v2/t29

    Absolute and normalised unfolded differential $\bar tq$ production cross$-$section as a function of $|y(t)|$ at parton level.

  • Table 30

    Figure 2a of the auxiliary material.

    10.17182/hepdata.82544.v2/t30

    Statistical correlation matrix for the absolute differential cross-section as a function of $p_{\mathrm{T}}(\hat{t\hspace{-0.2mm}})$ for $tq$ events(at the particle level). It...

  • Table 31

    Figure 2b of the auxiliary material.

    10.17182/hepdata.82544.v2/t31

    Statistical correlation matrix for the absolute differential cross-section as a function of $p_{\mathrm{T}}(\hat{t\hspace{-0.2mm}})$ for $ \bar tq$ events (at the...

  • Table 32

    Figure 2c of the auxiliary material.

    10.17182/hepdata.82544.v2/t32

    Statistical correlation matrix for the normalised differential cross-section as a function of $p_{\mathrm{T}}(\hat{t\hspace{-0.2mm}})$ for $tq$ events (at the particle level)....

  • Table 33

    Figure 2d of the auxiliary material.

    10.17182/hepdata.82544.v2/t33

    Statistical correlation matrix for the normalised differential cross-section as a function of $p_{\mathrm{T}}(\hat{t\hspace{-0.2mm}})$ for $\bar tq$ events (at the particle...

  • Table 34

    Figure 3a of the auxiliary material.

    10.17182/hepdata.82544.v2/t34

    Statistical correlation matrix for the absolute differential cross-section as a function of $|y(\hat{t\hspace{-0.2mm}})|$ for $tq$ events (at the particle level)....

  • Table 35

    Figure 3b of the auxiliary material.

    10.17182/hepdata.82544.v2/t35

    Statistical correlation matrix for the absolute differential cross-section as a function of $|y(\hat{t\hspace{-0.2mm}})|$ for $ \bar tq$ events (at the...

  • Table 36

    Figure 3c of the auxiliary material.

    10.17182/hepdata.82544.v2/t36

    Statistical correlation matrix for the normalised differential cross-section as a function of $|y(\hat{t\hspace{-0.2mm}})|$ for $tq$ events (at the particle level)....

  • Table 37

    Figure 3d of the auxiliary material.

    10.17182/hepdata.82544.v2/t37

    Statistical correlation matrix for the normalised differential cross-section as a function of $|y(\hat{t\hspace{-0.2mm}})|$ for $\bar tq$ events (at the particle...

  • Table 38

    Figure 4a of the auxiliary material.

    10.17182/hepdata.82544.v2/t38

    Statistical correlation matrix for the absolute differential cross-section as a function of $p_{\mathrm{T}}(\hat{j\hspace{-0.2mm}})$ for $tq$ events (at the particle level)....

  • Table 39

    Figure 4b of the auxiliary material.

    10.17182/hepdata.82544.v2/t39

    Statistical correlation matrix for the absolute differential cross-section as a function of $p_{\mathrm{T}}(\hat{j\hspace{-0.2mm}})$ for $\bar tq$ events (at the particle...

  • Table 40

    Figure 4c of the auxiliary material.

    10.17182/hepdata.82544.v2/t40

    Statistical correlation matrix for the normalised differential cross-section as a function of $p_{\mathrm{T}}(\hat{j\hspace{-0.2mm}})$ for $tq$ events (at the particle level)....

  • Table 41

    Figure 4d of the auxiliary material.

    10.17182/hepdata.82544.v2/t41

    Statistical correlation matrix for the normalised differential cross-section as a function of $p_{\mathrm{T}}(\hat{j\hspace{-0.2mm}})$ for $\bar tq$ events (at the particle...

  • Table 42

    Figure 5a of the auxiliary material.

    10.17182/hepdata.82544.v2/t42

    Statistical correlation matrix for the absolute differential cross-section as a function of $|y(\hat{j\hspace{-0.2mm}})|$ for $tq$ events (at the particle level)....

  • Table 43

    Figure 5b of the auxiliary material.

    10.17182/hepdata.82544.v2/t43

    Statistical correlation matrix for the absolute differential cross-section as a function of $|y(\hat{j\hspace{-0.2mm}})|$ for $\bar tq$ events (at the particle...

  • Table 44

    Figure 5c of the auxiliary material.

    10.17182/hepdata.82544.v2/t44

    Statistical correlation matrix for the normalised differential cross-section as a function of $|y(\hat{j\hspace{-0.2mm}})|$ for $tq$ events (at the particle level)....

  • Table 45

    Figure 5d of the auxiliary material.

    10.17182/hepdata.82544.v2/t45

    Statistical correlation matrix for the normalised differential cross-section as a function of $|y(\hat{j\hspace{-0.2mm}})|$ for $\bar tq$ events (at the particle...

  • Table 46

    Figure 6a of the auxiliary material.

    10.17182/hepdata.82544.v2/t46

    Statistical correlation matrix for the absolute differential cross-section as a function of $p_{\mathrm{T}}(t)$ for $tq$ events (at the parton level)....

  • Table 47

    Figure 6b of the auxiliary material.

    10.17182/hepdata.82544.v2/t47

    Statistical correlation matrix for the absolute differential cross-section as a function of $p_{\mathrm{T}}(t)$ for $ \bar tq$ events (at the...

  • Table 48

    Figure 6c of the auxiliary material.

    10.17182/hepdata.82544.v2/t48

    Statistical correlation matrix for the normalised differential cross-section as a function of $p_{\mathrm{T}}(t)$ for $tq$ events (at the parton level)....

  • Table 49

    Figure 6d of the auxiliary material.

    10.17182/hepdata.82544.v2/t49

    Statistical correlation matrix for the normalised differential cross-section as a function of $p_{\mathrm{T}}(t)$ for $ \bar tq$ events (at the...

  • Table 50

    Figure 7a of the auxiliary material.

    10.17182/hepdata.82544.v2/t50

    Statistical correlation matrix for the absolute differential cross-section as a function of $|y(t)|$ for $tq$ events (at the parton level)....

  • Table 51

    Figure 7b of the auxiliary material.

    10.17182/hepdata.82544.v2/t51

    Statistical correlation matrix for the absolute differential cross-section as a function of $|y(t)|$ for $\bar tq$ events (at the parton...

  • Table 52

    Figure 7c of the auxiliary material.

    10.17182/hepdata.82544.v2/t52

    Statistical correlation matrix for the normalised differential cross-section as a function of $|y(t)|$ for $tq$ events (at the parton level)....

  • Table 53

    Figure 7d of the auxiliary material.

    10.17182/hepdata.82544.v2/t53

    Statistical correlation matrix for the normalised differential cross-section as a function of $|y(t)|$ for $\bar tq$ events (at the parton...

  • Table 54

    Table 1 of the auxiliary material.

    10.17182/hepdata.82544.v2/t54

    Fiducial acceptance $A_{\mathrm{fid}}$ for different $t$-channel single top-quark MC samples. $^{\mathrm{(a)}}$ Calculation taken from AcerMC $+$ $\mathrm{P{\scriptsize YTHIA}6}$. $^{\mathrm{(b)}}$ Calculation...

  • Table 55

    Table 2 of the auxiliary material.

    10.17182/hepdata.82544.v2/t55

    Fiducial acceptance $A_{\mathrm{fid}}$ for different $t$-channel single top-antiquark MC samples. $^{\mathrm{(a)}}$ Calculation taken from AcerMC $+$ $\mathrm{P{\scriptsize YTHIA}6}$. $^{\mathrm{(b)}}$ Calculation...

  • Table 56

    Table 3 of the auxiliary material.

    10.17182/hepdata.82544.v2/t56

    Uncertainties for the absolute differential $tq$ cross-section as a function of $p_{\mathrm{T}}(\hat{t\hspace{-0.2mm}})$ at particle level per bin ([0,35,50,75,100,150,200,300] GeV) in...

  • Table 57

    Table 4 of the auxiliary material.

    10.17182/hepdata.82544.v2/t57

    Uncertainties for the normalised differential $tq$ cross-section as a function of $p_{\mathrm{T}}(\hat{t\hspace{-0.2mm}})$ at particle level per bin ([0,35,50,75,100,150,200,300] GeV) in...

  • Table 58

    Table 5 of the auxiliary material.

    10.17182/hepdata.82544.v2/t58

    Uncertainties for the absolute differential $\bar tq$ cross-section as a function of $p_{\mathrm{T}}(\hat{t\hspace{-0.2mm}})$ at particle level per bin ([0,35,50,75,100,150,300] GeV)...

  • Table 59

    Table 6 of the auxiliary material.

    10.17182/hepdata.82544.v2/t59

    Uncertainties for the normalised differential $\bar tq$ cross-section as a function of $p_{\mathrm{T}}(\hat{t\hspace{-0.2mm}})$ at particle level per bin ([0,35,50,75,100,150,300] GeV)...

  • Table 60

    Table 7 of the auxiliary material.

    10.17182/hepdata.82544.v2/t60

    Uncertainties for the absolute differential $tq$ cross-section as a function of $|y(\hat{t\hspace{-0.2mm}})|$ at particle level per bin ([0,0.15,0.3,0.45,0.7,1.0,1.3,2.2]) in percent...

  • Table 61

    Table 8 of the auxiliary material.

    10.17182/hepdata.82544.v2/t61

    Uncertainties for the normalised differential $tq$ cross-section as a function of $|y(\hat{t\hspace{-0.2mm}})|$ at particle level per bin ([0,0.15,0.3,0.45,0.7,1.0,1.3,2.2]) in percent...

  • Table 62

    Table 9 of the auxiliary material.

    10.17182/hepdata.82544.v2/t62

    Uncertainties for the absolute differential $\bar tq$ cross-section as a function of $|y(\hat{t\hspace{-0.2mm}})|$ at particle level per bin ([0,0.15,0.3,0.45,0.7,1.0,1.3,2.2]) in...

  • Table 63

    Table 10 of the auxiliary material.

    10.17182/hepdata.82544.v2/t63

    Uncertainties for the normalised differential $\bar tq$ cross-section as a function of $|y(\hat{t\hspace{-0.2mm}})|$ at particle level per bin ([0,0.15,0.3,0.45,0.7,1.0,1.3,2.2]) in...

  • Table 64

    Table 11 of the auxiliary material.

    10.17182/hepdata.82544.v2/t64

    Uncertainties for the absolute differential $tq$ cross-section as a function of $p_{\mathrm{T}}(\hat{j\hspace{-0.2mm}})$ at particle level per bin ([30,45,60,75,100,150,300] GeV) in...

  • Table 65

    Table 12 of the auxiliary material.

    10.17182/hepdata.82544.v2/t65

    Uncertainties for the normalised differential $tq$ cross-section as a function of $p_{\mathrm{T}}(\hat{j\hspace{-0.2mm}})$ at particle level per bin ([30,45,60,75,100,150,300] GeV) in...

  • Table 66

    Table 13 of the auxiliary material.

    10.17182/hepdata.82544.v2/t66

    Uncertainties for the absolute differential $\bar tq$ cross-section as a function of $p_{\mathrm{T}}(\hat{j\hspace{-0.2mm}})$ at particle level per bin ([30,45,60,75,100,150,300] GeV)...

  • Table 67

    Table 14 of the auxiliary material.

    10.17182/hepdata.82544.v2/t67

    Uncertainties for the normalised differential $\bar tq$ cross-section as a function of $p_{\mathrm{T}}(\hat{j\hspace{-0.2mm}})$ at particle level per bin ([30,45,60,75,100,150,300] GeV)...

  • Table 68

    Table 15 of the auxiliary material.

    10.17182/hepdata.82544.v2/t68

    Uncertainties for the absolute differential $tq$ cross-section as a function of $|y(\hat{j\hspace{-0.2mm}})|$ at particle level per bin ([0.0, 1.2, 1.7,...

  • Table 69

    Table 16 of the auxiliary material.

    10.17182/hepdata.82544.v2/t69

    Uncertainties for the normalised differential $tq$ cross-section as a function of $|y(\hat{j\hspace{-0.2mm}})|$ at particle level per bin ([0.0, 1.2, 1.7,...

  • Table 70

    Table 17 of the auxiliary material.

    10.17182/hepdata.82544.v2/t70

    Uncertainties for the absolute differential $\bar tq$ cross-section as a function of $|y(\hat{j\hspace{-0.2mm}})|$ at particle level per bin ([0.0, 1.2,...

  • Table 71

    Table 18 of the auxiliary material.

    10.17182/hepdata.82544.v2/t71

    Uncertainties for the normalised differential $\bar tq$ cross-section as a function of $|y(\hat{j\hspace{-0.2mm}})|$ at particle level per bin ([0.0, 1.2,...

  • Table 72

    Table 19 of the auxiliary material.

    10.17182/hepdata.82544.v2/t72

    Uncertainties for the absolute differential $tq$ cross-section as a function of $p_{\mathrm{T}}(t)$ at parton level per bin ([0,50,100,150,200,300] GeV) in...

  • Table 73

    Table 20 of the auxiliary material.

    10.17182/hepdata.82544.v2/t73

    Uncertainties for the normalised differential $tq$ cross-section as a function of $p_{\mathrm{T}}(t)$ at parton level per bin ([0,50,100,150,200,300] GeV) in...

  • Table 74

    Table 21 of the auxiliary material.

    10.17182/hepdata.82544.v2/t74

    Uncertainties for the absolute differential $\bar tq $ cross-section as a function of $p_{\mathrm{T}}(t)$ at parton level per bin ([0,50,100,150,300]...

  • Table 75

    Table 22 of the auxiliary material.

    10.17182/hepdata.82544.v2/t75

    Uncertainties for the normalised differential $\bar tq $ cross-section as a function of $p_{\mathrm{T}}(t)$ at parton level per bin ([0,50,100,150,300]...

  • Table 76

    Table 23 of the auxiliary material.

    10.17182/hepdata.82544.v2/t76

    Uncertainties for the absolute differential $ tq $ cross-section as a function of $|y(t)|$ at parton level per bin ([0,0.3,0.7,1.3,2.2])...

  • Table 77

    Table 24 of the auxiliary material.

    10.17182/hepdata.82544.v2/t77

    Uncertainties for the normalised differential $ tq $ cross-section as a function of $|y(t)|$ at parton level per bin ([0,0.3,0.7,1.3,2.2])...

  • Table 78

    Table 25 of the auxiliary material.

    10.17182/hepdata.82544.v2/t78

    Uncertainties for the absolute differential $ \bar tq $ cross-section as a function of $|y(t)|$ at parton level per bin...

  • Table 79

    Table 26 of the auxiliary material.

    10.17182/hepdata.82544.v2/t79

    Uncertainties for the normalised differential $ \bar tq $ cross-section as a function of $|y(t)|$ at parton level per bin...

Version 2 modifications: Statistical correlation matrices, details of the fiducial acceptance and full systematic uncertainty tables have been added since the previous version.

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