From the 1 of 9 linked papers with an AI index.
9 papers
Infrared singularities and the collinear limits of multi-leg scattering amplitudes
Sebastian Jaskiewicz
Scattering amplitudes admit a factorised structure in special kinematic limits, such as the soft and collinear limits. In this work, we investigate the multi-particle collinear lim…
Spacelike-Collinear Scattering by the Method of Regions
Wen Chen, Einan Gardi, Rourou Ma +3
The paper analyses the spacelike‑collinear limit of gauge‑theory scattering amplitudes using the Method of Regions, identifying a hidden soft‑Glauber region that generates kinemati…
Progress on the soft anomalous dimension in QCD
Einan Gardi, Zehao Zhu
We review the state-of-the-art knowledge of IR singularities in multileg QCD amplitudes, identifying the key reasons for the remarkable simplicity of the soft anomalous dimension.…
Infrared singularities of multileg amplitudes with a massive particle at three loops
Einan Gardi, Zehao Zhu
We determine the complete three-loop QCD soft anomalous dimension for multileg amplitudes involving a single massive coloured particle and any number of massless ones. This is achi…
Computing the soft anomalous dimension with massless particles using the method of regions
Einan Gardi, Zehao Zhu
It is well known that soft singularities of massless amplitudes are significantly simpler than those of massive ones. However, the computation of the soft anomalous dimension (AD)…
Infrared singularities and the collinear limits of multi-leg scattering amplitudes
Claude Duhr, Einan Gardi, Sebastian Jaskiewicz +2
Scattering amplitudes are expected to admit a factorised structure in special kinematic limits, such as the Regge, soft and collinear limits. However, less is known about the preci…