| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 10724944 | Physics Letters B | 2007 | 7 Pages |
Abstract
We compute the third-order correction to electromagnetic S-wave quarkonium production and annihilation rates due to the emission and absorption of an ultrasoft gluon. Our result completes the analysis of the non-relativistic quarkonium bound-state dynamics in the next-to-next-to-next-to-leading order. The impact of the ultrasoft correction on the Ï(1S) leptonic width and the top quark-antiquark threshold production cross section is estimated.
Related Topics
Physical Sciences and Engineering
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Nuclear and High Energy Physics
Authors
M. Beneke, Y. Kiyo, A.A. Penin,