Unitarity cuts and reduction to master integrals in d dimensions for one-loop amplitudes

被引：131

作者：

Anastasiou, Charalampos ^{[1
]}

Britto, Ruth

Feng, Bo

Kunszt, Zoltan

Mastrolia, Pierpaolo

机构：

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

[2] Univ Amsterdam, Inst Theoret Phys, NL-1018 XE Amsterdam, Netherlands

[3] Zhejiang Univ, Ctr Math Sci, Hangzhou 310027, Peoples R China

[4] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2AZ, England

[5] Univ London Imperial Coll Sci Technol & Med, Inst Math Sci, London SW7 2AZ, England

[6] ETH, Inst Theoret Phys, CH-8093 Zurich, Switzerland

[7] Univ Zurich, Inst Theoret Phys, CH-8057 Zurich, Switzerland

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2007年 / 03期

关键词：

NLO computations; QCD;

D O I：

10.1088/1126-6708/2007/03/111

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 an alternative reduction to master integrals for one-loop amplitudes using a unitarity cut method in arbitrary dimensions. We carry out the reduction in two steps. The first step is a pure four-dimensional cut-integration of tree amplitudes with a mass parameter, and the second step is applying dimensional shift identities to master integrals. This reduction is performed at the integrand level, so that coefficients can be read out algebraically.

引用

页数：39

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