Ultrasoft contribution to quarkonium production and annihilation
High Energy Physics - Phenomenology
2008-11-26 v1
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 Upsilon(1S) leptonic width and the top quark-antiquark threshold production cross section is estimated.
Keywords
Cite
@article{arxiv.0706.2733,
title = {Ultrasoft contribution to quarkonium production and annihilation},
author = {M. Beneke and Y. Kiyo and A. A. Penin},
journal= {arXiv preprint arXiv:0706.2733},
year = {2008}
}
Comments
10 pages