A complete two-loop, five-gluon helicity amplitude in Yang-Mills theory
A complete two-loop, five-gluon helicity amplitude in Yang-Mills theory
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DOI：
10.1007/jhep10(2015)064
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发表时间：
2015-07
影响因子：
5.4
通讯作者：
S. Badger;Gustav Mogull;Alexander Ochirov;D. O’Connell
中科院分区：
文献类型：
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作者：
S. Badger;Gustav Mogull;Alexander Ochirov;D. O’Connell
在纯Yang-Mills理论中，利用广义统一切计算了全彩色、双环、五胶子散射振幅在所有螺旋度为正情况下的被积。由切面中出现的幅度所满足的树级BCJ关系，使我们能够从已知的平面数据中推断出全彩幅度的所有必要的非平面信息。我们提出了我们的结果在不可约分子，与颜色因子衍生自多外围颜色分解。最后，对主要的软散度进行检查，以再现预期的红外行为。
We compute the integrand of the full-colour, two-loop, five-gluon scattering amplitude in pure Yang-Mills theory with all helicities positive, using generalized unitarity cuts. Tree-level BCJ relations, satisfied by amplitudes appearing in the cuts, allow us to deduce all the necessary non-planar information for the full-colour amplitude from known planar data. We present our result in terms of irreducible numerators, with colour factors derived from the multi-peripheral colour decomposition. Finally, the leading soft divergences are checked to reproduce the expected infrared behaviour.