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Implementing NLO DGLAP evolution in parton showers

Höche, Stefan; Krauss, Frank; Prestel, Stefan

Implementing NLO DGLAP evolution in parton showers Thumbnail


Stefan Höche

Stefan Prestel


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.


Höche, S., Krauss, F., & Prestel, S. (2017). Implementing NLO DGLAP evolution in parton showers. Journal of High Energy Physics, 2017(10), Article 93.

Journal Article Type Article
Acceptance Date Sep 22, 2017
Online Publication Date Oct 13, 2017
Publication Date Oct 13, 2017
Deposit Date Dec 14, 2017
Publicly Available Date Dec 14, 2017
Journal Journal of High Energy Physics
Print ISSN 1126-6708
Publisher Scuola Internazionale Superiore di Studi Avanzati (SISSA)
Peer Reviewed Peer Reviewed
Volume 2017
Issue 10
Article Number 93


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Copyright Statement
This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.

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