Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Coloring mixed QCD/QED evolution

Gellersen, Leif LU ; Prestel, Stefan LU and Spannowsky, Michael (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.

(Less)
Please use this url to cite or link to this publication:
author
; and
organization
publishing date
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}},
}