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arXiv · 1109.1536

Hadronic top-quark pair production with NNLL threshold resummation

M. Beneke·P. Falgari·S. Klein·C. Schwinn
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Abstract

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. The implementation of joint soft and Coulomb resummation, its ambiguities, and the present theoretical uncertainty are discussed in detail. We further obtain new approximate results at N3LO.

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M. Beneke, P. Falgari, S. Klein, C. Schwinn. 2011-09-07. Hadronic top-quark pair production with NNLL threshold resummation. https://doi.org/10.1016/j.nuclphysb.2011.10.021

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