3 papers
hep-ph2020
Locally finite two-loop amplitudes for off-shell multi-photon production in electron-positron annihilation
Charalampos Anastasiou, Rayan Haindl, George Sterman +2
We study the singularity structure of two-loop QED amplitudes for the production of multiple off-shell photons in massless electron-positron annihilation and develop counterterms t…
hep-ph2020
Tree-level splitting amplitudes for a gluon into four collinear partons
Vittorio Del Duca, Claude Duhr, Rayan Haindl +2
We compute in conventional dimensional regularisation the tree-level splitting amplitudes for a gluon parent which splits into four collinear partons. This is part of the universal…
hep-ph2019
Tree-level splitting amplitudes for a quark into four collinear partons
Vittorio Del Duca, Claude Duhr, Rayan Haindl +2
We compute in conventional dimensional regularisation the tree-level splitting amplitudes for a quark parent in the limit where four partons become collinear to each other. This is…