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The production of top-quark pairs in hadronic collisions is among the mostimportant reactions in modern particle physics phenomenology and constitutes aninstrumental avenue to study the properties of the heaviest quark observed innature. The analysis of this process at the Large Hadron Collider reliesheavily on Monte Carlo simulations of the final state events, whose accuracy ischallenged by the outstanding precision of experimental measurements. In thisletter we present the first matched computation of top-quark pair production atnext-to-next-to-leading order in QCD with all-order radiative corrections asimplemented via parton-shower simulations. Besides its intrinsic relevance forLHC phenomenology, this work also establishes an important step towards thesimulation of other hadronic processes with colour charges in the final state.

Next-to-next-to-leading order event generation for top-quark pair production