5 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…
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…
Next-to-leading power jet functions in the small-mass limit in QED
Robin van Bijleveld, Eric Laenen, Coenraad Marinissen +2
We investigate the factorization properties of the massive fermion form factor in QED, to next-to-leading power in the fermion mass, and up to two-loop order. For this purpose we d…
The Two-Loop Lipatov Vertex in QCD
Samuel Abreu, Giuseppe De Laurentis, Giulio Falcioni +3
High-energy factorization of 2 -> 2 amplitudes in QCD has been recently pushed to the next-to-next-to-leading logarithmic order by determining the three-loop gluon Regge trajectory…
Regge poles and cuts and the Lipatov vertex
Samuel Abreu, Giulio Falcioni, Einan Gardi +2
Scattering amplitudes in the high-energy limit can be described in terms of their singularity structure in the complex angular momentum plane, consisting of Regge poles and cuts. I…