Coloring mixed QCD/QED evolution

Gellersen, Leif; Prestel, Stefan; Spannowsky, Michael

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