Coloring mixed QCD/QED evolution

Leif Gellersen; Stefan Prestel; Michael Spannowsky

doi:10.21468/SciPostPhys.13.2.034

Coloring mixed QCD/QED evolution

Leif Gellersen, Stefan Prestel, Michael Spannowsky

Durham University

Research output: Contribution to journal › Article › peer-review

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 subdominant 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.

Original language	English
Article number	034
Journal	SciPost Physics
Volume	13
Issue number	2
DOIs	https://doi.org/10.21468/SciPostPhys.13.2.034
Publication status	Published - 2022 Aug

Subject classification (UKÄ)

Physical Sciences

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10.21468/SciPostPhys.13.2.034

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title = "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 subdominant 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.",

author = "Leif Gellersen and Stefan Prestel and Michael Spannowsky",

year = "2022",

month = aug,

doi = "10.21468/SciPostPhys.13.2.034",

language = "English",

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AU - Gellersen, Leif

AU - Prestel, Stefan

AU - Spannowsky, Michael

PY - 2022/8

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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 subdominant 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.

U2 - 10.21468/SciPostPhys.13.2.034

DO - 10.21468/SciPostPhys.13.2.034

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VL - 13

JO - SciPost Physics

JF - SciPost Physics

IS - 2

M1 - 034

ER -

Coloring mixed QCD/QED evolution

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