Coloring mixed QCD/QED evolution [article]

Leif Gellersen, Stefan Prestel, Michael Spannowsky
2021 arXiv   pre-print
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
more » ... d color, and employing complete tree-level matrix element corrections for individual N_C=3 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.
arXiv:2109.09706v1 fatcat:5r46go7iardnfa2xcvzuo5awue