Hadronic top-quark pair production with NNLL threshold resummation

2011/09/07 by M. Beneke, P. Falgari, S. Klein +1 · 1 citation
Physics and Astronomy · #hep-ph #hep-ex

paper · pdf · doi:10.1016/j.nuclphysb.2011.10.021

published as Nucl. Phys. B855:695-741, 2012 · 55 pages, LaTeX, 13 figures

arxiv created 2011/09/07 · arxiv updated 2011/11/14

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 σ_{t t} = 7.22^+0.31+0.71_-0.47-0.55 pb at Tevatron and σ_{t 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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