arXiv:0804.4004·v1·High Energy Physics — Phenomenology
Ultrasoft contribution to heavy-quark pair production near threshold
M. Beneke (RWTH Aachen U.)🇩🇪 · Y. Kiyo (Karlsruhe U.)🇩🇪
Abstract
We compute the third-order correction to the heavy-quark current correlation function due to the emission and absorption of an ultrasoft gluon. Our result supplies a missing contribution to top-quark pair production near threshold and the determination of the bottom quark mass from QCD sum rules.
Comments: 10 pages, LaTeX