Progress in top-pair production at hadron colliders

Abstract

We review recently derived NNLO QCD results for top-pair production at hadron colliders. We compare the size of the NNLO corrections in q q t t+X with the LO and NLO ones, and address the question of convergence of perturbative series. We compare the NLO and NNLO K-factors for the Tevatron.

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