Top quark production near threshold: NNLO QCD correction
High Energy Physics - Phenomenology
2008-11-26 v4
Abstract
We calculate the cross section of the process e^+e^- \to t\bar t near threshold by resumming Coulomb-like terms with next-to-next-to-leading (NNLO) accuracy. The nonrelativistic Green function formalism and the method of ``direct matching'' are used. The NNLO correction turns out to be large, of the same size as the NLO correction. It changes the position and the normalization of the 1S-peak. The obtained results are compared with results existing in the literature.
Cite
@article{arxiv.hep-ph/9808463,
title = {Top quark production near threshold: NNLO QCD correction},
author = {Oleg Yakovlev},
journal= {arXiv preprint arXiv:hep-ph/9808463},
year = {2008}
}
Comments
LaTeX, 12 pages, 4 ps figures, journal version