Coloring mixed QCD/QED evolution

Gellersen, Leif; Prestel, Stefan; Spannowsky, Michael

doi:10.21468/SciPostPhys.13.2.034

SciPost Physics

Coloring mixed QCD/QED evolution

Leif Gellersen, Stefan Prestel, Michael Spannowsky

SciPost Phys. 13, 034 (2022) · published 26 August 2022

doi: 10.21468/SciPostPhys.13.2.034
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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 $N_C=3$ 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.

TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhys.13.2.034
TI  - Coloring mixed QCD/QED evolution
PY  - 2022/08/26
UR  - https://scipost.org/SciPostPhys.13.2.034
JF  - SciPost Physics
JA  - SciPost Phys.
VL  - 13
IS  - 2
SP  - 034
A1  - Gellersen, Leif
AU  - Prestel, Stefan
AU  - Spannowsky, Michael
AB  - 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 $N_C=3$ 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.
ER  -

@Article{10.21468/SciPostPhys.13.2.034,
	title={{Coloring mixed QCD/QED evolution}},
	author={Leif Gellersen and Stefan Prestel and Michael Spannowsky},
	journal={SciPost Phys.},
	volume={13},
	pages={034},
	year={2022},
	publisher={SciPost},
	doi={10.21468/SciPostPhys.13.2.034},
	url={https://scipost.org/10.21468/SciPostPhys.13.2.034},
}

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Funders for the research work leading to this publication

Horizon 2020 (through Organization: European Commission [EC])
Vetenskapsrådet / Swedish Research Council