Coloring mixed QCD/QED evolution
Abstract
Parton showers are crucial components of high-energy physics calculations. Improving their modelling of QCD is an active research area since shower approximations are stumbling blocks for precision event generators. Naively, the interference between sub-dominant Standard-Model interactions and QCD can be of similar size to subleading QCD corrections. This article assesses the impact of QCD/QED interference effects in parton showers, by developing a sophisticated shower including QED, QCD at fixed color, and employing complete tree-level matrix element corrections for individual color configurations to embed interference. The resulting simulation indicates that QCD/QED interference effects are small for a simple test case and dwarfed by electro-weak resonance effects.
Cite
@article{arxiv.2109.09706,
title = {Coloring mixed QCD/QED evolution},
author = {Leif Gellersen and Stefan Prestel and Michael Spannowsky},
journal= {arXiv preprint arXiv:2109.09706},
year = {2022}
}
Comments
15 pages, 10 figures, version accepted for publication in SciPostPhys