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

Abstract

Preliminary results of two differential cross-section measurements in the ATLAS experiment at CERN are presented. Measurements are focused on the top-antitop pair production in the lepton+jets and the all-jets channels in the kinematic region with high transverse momentum top quarks. Both measurements use the full Run 2 data of 13 TeV proton-proton collisions from the Large Hadron Collider collected by the ATLAS in 2015-2018, corresponding to an integrated luminosity of 139 fb$^{-1}$. Measured spectra are compared with the Standard Model predictions and they are used to set limits on the Wilson coefficients of the effective field theory extension of the Standard Model