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 $q\bar{q}\to t\bar{t}+X$ 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.

Comments: 4 pages, 2 figures. Contribution to Rencontres de Moriond "QCD and High Energy Interactions", La Thuile, March 10-17, 2012. v2: references updated