Photon Radiation with MadDipole
T. Gehrmann, N. Greiner
TL;DR
Extends MadDipole to automate NLO electroweak corrections from photon radiation using dipole subtraction in both dimensional and mass regularization. It handles non-collinear-safe observables by incorporating z-dependence and photon fragmentation, and describes QED PDF effects and implementation details. The work provides practical guidance for installation, usage, and validation, with checks against known results. This enables more reliable and flexible predictions for EW processes at colliders.
Abstract
We present the automation of a subtraction method for photon radiation using the dipole formalism within the MadGraph framework. The subtraction terms are implemented both in dimensional regularization and mass regularization for massless and massive cases and non-collinear-safe observables are accounted for.