The singular behaviour of QCD amplitudes at two-loop order

被引：574

作者：

Catani, S ^{[1
]}

机构：

[1] CERN, Div Theory, CH-1211 Geneva 23, Switzerland

[2] Univ Paris Sud, LPTHE, F-91405 Orsay, France

来源：

PHYSICS LETTERS B | 1998年 / 427卷 / 1-2期

关键词：

D O I：

10.1016/S0370-2693(98)00332-3

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We discuss the structure of infrared singularities in on-shell QCD amplitudes at two-loop order. We present a,general factorization formula that controls all the epsilon-poles of the dimensionally regularized amplitudes, The dependence on the regularization scheme is considered and the coefficients of the 1/epsilon(+),1/epsilon(3) and 1/epsilon(2) poles are explicitly given in the most general case. The remaining single-pole contributions are also explicitly evaluated in the case of amplitudes with a <q(q)over bar> pair. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：161 / 171

页数：11

共 48 条

[1] MULTIPLE SOFT GLUON RADIATION IN PARTON PROCESSES [J].