Ultrasoft contribution to heavy-quark pair production near threshold |
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| Authors: | M. Beneke Y. Kiyo |
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| Affiliation: | 1. Institut für Theoretische Physik E, RWTH Aachen University, D-52056 Aachen, Germany;2. Institut für Theoretische Teilchenphysik, Universität Karlsruhe, D-76128 Karlsruhe, Germany |
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| 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. |
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| Keywords: | 12.38.Bx 13.66.Jn 14.65.Fy 14.65.Ha |
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