Abstract
Measurements of differential cross sections of top quark pair production in association with
jets by the ATLAS experiment at the LHC are presented. The measurements are performed as functions
of the top quark transverse momentum, the transverse momentum of the top quark- antitop quark
system and the out-of-plane transverse momentum using data from pp collisions
at √s = 13 TeV collected by the ATLAS detector at the LHC in 2015 and corresponding to
an integrated luminosity of 3.2 fb−1. The top quark pair events are selected in the lepton
(electron or muon) + jets channel. The measured cross sections, which are compared to
several predictions, allow a detailed study of top quark production.