NNLL threshold resummation for the total top-pair production cross   section
  We present predictions for the total top-quark pair production cross section at the Tevatron and the LHC with 7,8 and 14 TeV centre-of-mass energy, including the resummation of threshold logarithms and Coulomb corrections through next-to-next-to-leading logarithmic order, and top-antitop bound-state contributions. The remaining theoretical and PDF uncertainties and prospects for the measurement of the top mass from the total cross section are discussed. 
M. Beneke, P. Falgari, S. Klein, J. Piclum, C. Schwinn
hep-ph