The total top-pair production cross section at NNLL
  We present results for the total top-pair production cross section at the Tevatron and the LHC. Our predictions supplement fixed-order results with resummation of soft logarithms and Coulomb singularities to next-to-next-to-leading (NNLL) logarithmic accuracy and include top-antitop bound-state effects. The effects of resummation, the dependence on the PDF set used, the residual sources of theoretical uncertainty and their implication for measurements of the top-quark mass are discussed. 
M. Beneke, P. Falgari, S. Klein, J. Piclum, C. Schwinn, M. Ubiali, F.   Yan
hep-ph