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Measurements of the charge asymmetry in top-quark pair production in the dilepton final state at $\sqrt{s}=8$ TeV with the ATLAS detector

The collaboration
Phys.Rev.D 94 (2016) 032006, 2016.

Abstract (data abstract)
Measurements of the top--antitop quark pair production charge asymmetry in the dilepton channel are presented using data corresponding to an integrated luminosity of 20.3 $fb^{-1}$ from pp collisions at a center-of-mass energy of $\sqrt{s}=8\,$ TeV collected with the ATLAS detector at the Large Hadron Collider at CERN. Inclusive and differential measurements as a function of the invariant mass, transverse momentum, and longitudinal boost of the $t\bar{t}$ system are performed both in the full phase space and in a fiducial phase space closely matching the detector acceptance. Two observables are studied: $A_{ll}^{C}$ based on the selected leptons and $A_{t\bar{t}}^C$ based on the reconstructed $t\bar{t}$ final state. The inclusive asymmetries are measured in the full phase space to be $A_{ll}^{C} =0.008 \pm 0.006$ and $A_{t\bar{t}}^C = 0.021 \pm 0.016$, which are in agreement with the Standard Model predictions of $A_{ll}^{C} = 0.0064 \pm 0.0003$ and $A_{t\bar{t}}^C = 0.0111 \pm 0.0004$.

• #### Table 1

Data from auxiliary Table 3

10.17182/hepdata.77033.v1/t1

Unfolded distribution for the inclusive $\Delta|\eta|$ observable in the fiducial volume.

• #### Table 2

Data from auxiliary Table 4

10.17182/hepdata.77033.v1/t2

Unfolded distribution for the inclusive $\Delta|y|$ observable in the fiducial volume.

• #### Table 3

Data from Figure 5 and auxiliary Table 1

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The leptonic inclusive asymmetry in the fiducial volume.

• #### Table 4

Data from Figure 5 and auxiliary Table 1

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The leptonic asymmetry dependence on the invariant mass of top-antitop system ($m_{t\bar{t}}$) in the fiducial volume.

• #### Table 5

Data from Figure 5 and auxiliary Table 1

10.17182/hepdata.77033.v1/t5

The leptonic asymmetry dependence on the longitudinal boost of the top-antitop system ($\beta_z^{t\bar{t}}$) in the fiducial volume.

• #### Table 6

Data from Figure 5 and auxiliary Table 1

10.17182/hepdata.77033.v1/t6

The leptonic asymmetry dependence on the transverse momentum of the top-antitop system ($p_T^{t\bar{t}}$) in the fiducial volume.

• #### Table 7

Data from Figure 6 and auxiliary Table 2

10.17182/hepdata.77033.v1/t7

The top-antitop inclusive asymmetry in the fiducial volume.

• #### Table 8

Data from Figure 6 and auxiliary Table 2

10.17182/hepdata.77033.v1/t8

The top-antitop asymmetry dependence on the invariant mass of top-antitop system ($m_{t\bar{t}}$) in the fiducial volume.

• #### Table 9

Data from Figure 6 and auxiliary Table 2

10.17182/hepdata.77033.v1/t9

The top-antitop asymmetry dependence on the longitudinal boost of the top-antitop system ($\beta_z^{t\bar{t}}$) in the fiducial volume.

• #### Table 10

Data from Figure 6 and auxiliary Table 2

10.17182/hepdata.77033.v1/t10

The top-antitop asymmetry dependence on the transverse momentum of the top-antitop system ($p_T^{t\bar{t}}$) in the fiducial volume.