论文标题
在强子山区的三光产生的前彩色两环QCD校正
Leading-Color Two-Loop QCD Corrections for Three-Photon Production at Hadron Colliders
论文作者
论文摘要
我们计算了在QCD的QCD中生产三个光子的两环螺旋振幅。使用两循环数值单位性方法，结合分析重建技术，我们根据分析形式的主积分来获得两环振幅的分解。这些表达式对维度调节器中的所有订单都是有效的。我们使用它们来计算两环有限的剩余器，这些剩余物以可以在整个物理相空间中有效评估的形式给出。我们将这些结果进一步包装在一个公共代码中，该公共代码组装了螺旋命中的平方两环剩余器，其在相位空间之间的数值稳定性已被证明。这是第一次公开用于直接现象学应用的五点两循环过程。
We compute the two-loop helicity amplitudes for the production of three photons at hadron colliders in QCD at leading-color. Using the two-loop numerical unitarity method coupled with analytic reconstruction techniques, we obtain the decomposition of the two-loop amplitudes in terms of master integrals in analytic form. These expressions are valid to all orders in the dimensional regulator. We use them to compute the two-loop finite remainders, which are given in a form that can be efficiently evaluated across the whole physical phase space. We further package these results in a public code which assembles the helicity-summed squared two-loop remainders, whose numerical stability across phase-space is demonstrated. This is the first time that a five-point two-loop process is publicly available for immediate phenomenological applications.
