Ultrasoft contribution to quarkonium production and annihilation

被引：48

作者：

Beneke, M. ^{[1
]}

Kiyo, Y.

Penin, A. A.

机构：

[1] Rhein Westfal TH Aachen, Inst Theoret Phys E, D-52056 Aachen, Germany

[2] Univ Karlsruhe, Inst Theoret Teilchenphys, D-76128 Karlsruhe, Germany

[3] Univ Alberta, Dept Phys, Edmonton, AB T6G 2J1, Canada

[4] Russian Acad Sci, Inst Nucl Res, Moscow 119899, Russia

来源：

PHYSICS LETTERS B | 2007年 / 653卷 / 01期

关键词：

D O I：

10.1016/j.physletb.2007.06.068

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 T (1S) leptonic width and the top quark-antiquark threshold production cross section is estimated. (c) 2007 Published by Elsevier B.V.

引用

页码：53 / 59

页数：7

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