Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2011-09-07
Nucl. Phys. B855:695-741, 2012
Physics
High Energy Physics
High Energy Physics - Phenomenology
55 pages, LaTeX, 13 figures
Scientific paper
10.1016/j.nuclphysb.2011.10.021
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.
Beneke Martin
Falgari Pietro
Klein Sebastian
Schwinn Christian
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