Three-loop helicity amplitudes for diphoton production in gluon fusion

被引：18
作者：
Bargiela, Piotr [1 ]
Caola, Fabrizio [1 ,2 ]
von Manteuffel, Andreas [3 ]
Tancredi, Lorenzo [1 ,4 ]
机构：
[1] Univ Oxford, Rudolf Peierls Ctr Theoret Phys, Clarendon Lab, Parks Rd, Oxford OX1 3PU, England
[2] Univ Oxford, Wadham Coll, Parks Rd, Oxford OX1 3PN, England
[3] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA
[4] Tech Univ Munich, Phys Dept, James Franck Str 1, D-85748 Garching, Germany
来源：
JOURNAL OF HIGH ENERGY PHYSICS | 2022年 / 2022卷 / 02期
基金：
欧洲研究理事会; 美国国家科学基金会; 英国科学技术设施理事会;
关键词：
NLO Computations; QCD Phenomenology; NUMERICAL EVALUATION; FEYNMAN; INTEGRATION; PARTS;
D O I：
10.1007/JHEP02(2022)153
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 a calculation of the helicity amplitudes for the process gg -> gamma gamma in three-loop massless QCD. We employ a recently proposed method to calculate scattering amplitudes in the 't Hooft-Veltman scheme that reduces the amount of spurious non-physical information needed at intermediate stages of the computation. Our analytic results for the three-loop helicity amplitudes are remarkably compact, and can be efficiently evaluated numerically. This calculation provides the last missing building block for the computation of NNLO QCD corrections to diphoton production in gluon fusion.
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收藏
页数：20
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