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Implementing NLO DGLAP evolution in parton showers

Höche, Stefan ; Krauss, Frank and Prestel, Stefan LU (2017) In Journal of High Energy Physics 2017(10).
Abstract

We present a parton shower which implements the DGLAP evolution of parton densities and fragmentation functions at next-to-leading order precision up to effects stemming from local four-momentum conservation. The Monte-Carlo simulation is based on including next-to-leading order collinear splitting functions in an existing parton shower and combining their soft enhanced contributions with the corresponding terms at leading order. Soft double counting is avoided by matching to the soft eikonal. Example results from two independent realizations of the algorithm, implemented in the two event generation frameworks Pythia and Sherpa, illustrate the improved precision of the new formalism.

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author
; and
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Jets, QCD Phenomenology
in
Journal of High Energy Physics
volume
2017
issue
10
article number
93
publisher
Springer
external identifiers
  • scopus:85040788273
ISSN
1029-8479
DOI
10.1007/JHEP10(2017)093
language
English
LU publication?
no
id
5c29efd8-d22d-464e-a046-c554e2876247
date added to LUP
2019-05-16 13:32:25
date last changed
2022-03-17 23:54:12
@article{5c29efd8-d22d-464e-a046-c554e2876247,
  abstract     = {{<p>We present a parton shower which implements the DGLAP evolution of parton densities and fragmentation functions at next-to-leading order precision up to effects stemming from local four-momentum conservation. The Monte-Carlo simulation is based on including next-to-leading order collinear splitting functions in an existing parton shower and combining their soft enhanced contributions with the corresponding terms at leading order. Soft double counting is avoided by matching to the soft eikonal. Example results from two independent realizations of the algorithm, implemented in the two event generation frameworks Pythia and Sherpa, illustrate the improved precision of the new formalism.</p>}},
  author       = {{Höche, Stefan and Krauss, Frank and Prestel, Stefan}},
  issn         = {{1029-8479}},
  keywords     = {{Jets; QCD Phenomenology}},
  language     = {{eng}},
  month        = {{10}},
  number       = {{10}},
  publisher    = {{Springer}},
  series       = {{Journal of High Energy Physics}},
  title        = {{Implementing NLO DGLAP evolution in parton showers}},
  url          = {{http://dx.doi.org/10.1007/JHEP10(2017)093}},
  doi          = {{10.1007/JHEP10(2017)093}},
  volume       = {{2017}},
  year         = {{2017}},
}