Analytic helicity amplitudes for two-loop five-gluon scattering: the single-minus case
Analytic helicity amplitudes for two-loop five-gluon scattering: the single-minus case
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DOI：
10.1007/jhep01(2019)186
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发表时间：
2018-11
影响因子：
5.4
通讯作者：
S. Badger;Christian Brønnum-Hansen;H. Hartanto;T. Peraro
中科院分区：
文献类型：
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作者：
S. Badger;Christian Brønnum-Hansen;H. Hartanto;T. Peraro
摘要：我们提出了杨-米尔斯理论中主色二环五胶子振幅的一个紧凑解析表达式，具有单个负螺旋度和四个正螺旋度。分析结果是根据有限域上的数值评估重建的。该数值方法将被积函数约简、分部积分恒等式和洛朗展开结合到五边形函数的基础中，以直接从六维广义酉割计算系数。
AbstractWe present a compact analytic expression for the leading colour two-loop five-gluon amplitude in Yang-Mills theory with a single negative helicity and four positive helicities. The analytic result is reconstructed from numerical evaluations over finite fields. The numerical method combines integrand reduction, integration-by-parts identities and Laurent expansion into a basis of pentagon functions to compute the coefficients directly from six-dimensional generalised unitarity cuts.