Coloring mixed QCD/QED evolution
(2022) In SciPost Physics 13(2).- 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... (More)
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.
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- author
- Gellersen, Leif LU ; Prestel, Stefan LU and Spannowsky, Michael
- organization
- publishing date
- 2022-08
- type
- Contribution to journal
- publication status
- published
- subject
- in
- SciPost Physics
- volume
- 13
- issue
- 2
- article number
- 034
- publisher
- SciPost
- external identifiers
-
- scopus:85138793598
- ISSN
- 2542-4653
- DOI
- 10.21468/SciPostPhys.13.2.034
- language
- English
- LU publication?
- yes
- id
- 8fc1ad67-ae70-41d1-a6a8-72947f9f8e91
- date added to LUP
- 2022-12-13 08:55:18
- date last changed
- 2024-04-04 14:03:59
@article{8fc1ad67-ae70-41d1-a6a8-72947f9f8e91, abstract = {{<p>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<sub>C</sub> = 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.</p>}}, author = {{Gellersen, Leif and Prestel, Stefan and Spannowsky, Michael}}, issn = {{2542-4653}}, language = {{eng}}, number = {{2}}, publisher = {{SciPost}}, series = {{SciPost Physics}}, title = {{Coloring mixed QCD/QED evolution}}, url = {{http://dx.doi.org/10.21468/SciPostPhys.13.2.034}}, doi = {{10.21468/SciPostPhys.13.2.034}}, volume = {{13}}, year = {{2022}}, }