Coloring mixed QCD/QED evolution

Gellersen, Leif; Prestel, Stefan; Spannowsky, Michael

doi:10.21468/scipostphys.13.2.034

Coloring mixed QCD/QED evolution

Gellersen, Leif; Prestel, Stefan; Spannowsky, Michael

Authors

Leif Gellersen

Stefan Prestel

Professor Michael Spannowsky michael.spannowsky@durham.ac.uk
Director

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 NC=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.

Citation

Gellersen, L., Prestel, S., & Spannowsky, M. (2022). Coloring mixed QCD/QED evolution. SciPost Physics, 13(2), https://doi.org/10.21468/scipostphys.13.2.034

Journal Article Type	Article
Acceptance Date	Jul 6, 2022
Online Publication Date	Aug 26, 2022
Publication Date	2022
Deposit Date	Dec 5, 2022
Publicly Available Date	Dec 5, 2022
Journal	SciPost Physics
Print ISSN	2542-4653
Publisher	SciPost
Peer Reviewed	Peer Reviewed
Volume	13
Issue	2
DOI	https://doi.org/10.21468/scipostphys.13.2.034