Two-loop QED and QCD corrections to massless fermion-boson scattering

被引：96
作者：
Anastasiou, C [1 ]
Glover, EWN
Tejeda-Yeomans, ME
机构：
[1] Univ Durham, Dept Phys, Durham DH1 3LE, England
[2] SLAC, Theory Grp, Menlo Pk, CA 94025 USA
[3] SUNY Stony Brook, CN Yang Inst Theoret Phys, Stony Brook, NY 11794 USA
来源：
NUCLEAR PHYSICS B | 2002年 / 629卷 / 1-3期
基金：
美国国家科学基金会; 澳大利亚研究理事会;
关键词：
QCD; jets; LEP HERA and SLC physics; NLO and NNLO computations;
D O I：
10.1016/S0550-3213(02)00140-2
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
We present the NNLO QCD virtual corrections for q (q) over bar --> ggamma, q (1) over bar --> gammagamma and the NNLO QED virtual corrections for e(-)e(+) --> gammagamma, and all processes related by crossing symmetry. We perform an explicit evaluation of the two-loop diagrams in conventional dimensional regularisation, and our results are renormalised in the MS scheme. The infrared pole structure of the amplitudes is in agreement with the prediction of Catani's general formalism for the singularities of two-loop amplitudes, while expressions for the finite remainder are given for all processes in terms of logarithms and polylogarithms that are real in the physical region. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：255 / 289
页数：35
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