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Preliminary results of two differential cross-section measurements in theATLAS experiment at CERN are presented. Measurements are focused on thetop-antitop quark pair production in the~lepton+jets and the~all-hadronicchannels in the kinematic region with high transverse momentum top quarks. Bothmeasurements use the full Run 2 data of 13 TeV proton-proton collisions fromthe Large Hadron Collider collected by the ATLAS detector in 2015-2018,corresponding to an integrated luminosity of 139 fb$^{-1}$. The measuredspectra are compared with the Standard Model predictions. They are also used toset limits on the Wilson coefficients of an effective field theory extension ofthe Standard Model.

Differential $t\bar{t}$ cross-section measurements using boosted top quarks with 139 fb$^{-1}$ of ATLAS data