Hadronic top-quark pair production with NNLL threshold resummation
High Energy Physics - Phenomenology
2011-11-14 v1 High Energy Physics - Experiment
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.
Keywords
Cite
@article{arxiv.1109.1536,
title = {Hadronic top-quark pair production with NNLL threshold resummation},
author = {M. Beneke and P. Falgari and S. Klein and C. Schwinn},
journal= {arXiv preprint arXiv:1109.1536},
year = {2011}
}
Comments
55 pages, LaTeX, 13 figures