On the factorization of overlapping singularities at NNLO

被引：27

作者：

Anastasiou, Charalampos ^{[1
]}

Herzog, Franz ^{[1
]}

Lazopoulos, Achilleas ^{[1
]}

机构：

[1] Swiss Fed Inst Technol, Inst Theoret Phys, CH-8093 Zurich, Switzerland

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2011年 / 03期

基金：

瑞士国家科学基金会;

关键词：

NLO Computations; QCD; HIGGS-BOSON PRODUCTION; DIFFERENTIAL-EQUATIONS;

D O I：

10.1007/JHEP03(2011)038

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：

Real and virtual corrections in NNLO QCD require multi-dimensional integrals with overlapping singularities. We first review ideas and methods which have been proposed for performing such computations. We then present a new method for the factorization of overlapping singularities based on non-linear integral transformations. We apply this method for the evaluation of all integral topologies which appear in double real radiation corrections in cross-section calculations for the production of a heavy system at hadron colliders. Finally, we demonstrate with typical examples that two-loop virtual corrections are amenable to the same method.

引用

页数：38

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