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Klein (RWTH Aachen U.)","submitted_at":"2011-09-07T18:55:18Z","abstract_excerpt":"We compute the total top-quark pair production cross section at the Tevatron and LHC based on approximate NNLO results, and on the summation of threshold logarithms and Coulomb enhancements to all orders with next-to-next-to-leading logarithmic (NNLL) accuracy, including bound-state effects. We find \\sigma_{t\\bar t} = 7.22^{+0.31+0.71}_{-0.47-0.55} pb at Tevatron and \\sigma_{t\\bar t} = 162.6^{+7.4+15.4}_{-7.6-14.7} pb at LHC with 7 TeV c.o.m. energy, for m_t=173.3 GeV. 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