Three-Loop Gluon Scattering in QCD and the Gluon Regge Trajectory
Three-Loop Gluon Scattering in QCD and the Gluon Regge Trajectory
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QCD 中的三环胶子散射和胶子 Regge 轨迹
DOI：
10.1103/physrevlett.128.212001
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发表时间：
2022
影响因子：
8.6
通讯作者：
Tancredi, Lorenzo
中科院分区：
文献类型：
--
作者：
Caola, Fabrizio;Chakraborty, Amlan;Gambuti, Giulio;von Manteuffel, Andreas;Tancredi, Lorenzo
我们计算了QCD中四个胶子散射的三环螺旋振幅。我们在t Hooft-Veltman方案中使用投影仪，并从最小的物理构建块集构建振幅，这使我们能够控制计算复杂性。我们得到了可以用调和多对数表示的相对紧凑的结果。此外，我们考虑了我们振幅的Regge极限，并提取了全三环QCD中的胶子Regge轨迹。这是研究单区域交换所需的最后一个缺失的成分，其对数精度几乎是领先的。
We compute the three-loop helicity amplitudes for the scattering of four gluons in QCD. We employ projectors in the ’t Hooft-Veltman scheme and construct the amplitudes from a minimal set of physical building blocks, which allows us to keep the computational complexity under control. We obtain relatively compact results that can be expressed in terms of harmonic polylogarithms. In addition, we consider the Regge limit of our amplitude and extract the gluon Regge trajectory in full three-loop QCD. This is the last missing ingredient required for studying single-Reggeon exchanges at next-to-next-to-leading logarithmic accuracy.