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Spin correlations in parton shower simulations

Richardson, Peter; Webster, Stephen

Spin correlations in parton shower simulations Thumbnail


Stephen Webster


Spin correlations are an important, but often neglected, effect in modern Monte Carlo event generators. We show that they can be fully incorporated in HERWIG7 using the algorithm originally proposed by Collins and Knowles in all stages of the event generation process and between the different stages of the event generation. In this paper we present the final missing ingredient, correlations in both the angular-ordered and dipole shower algorithms and between the parton shower and hard production and decay processes.


Richardson, P., & Webster, S. (2019). Spin correlations in parton shower simulations. The European Physical Journal C, 80(2), Article 83.

Journal Article Type Article
Acceptance Date Jun 5, 2019
Online Publication Date Oct 25, 2019
Publication Date Oct 25, 2019
Deposit Date Feb 4, 2020
Publicly Available Date Feb 4, 2020
Journal European Physical Journal C: Particles and Fields
Print ISSN 1434-6044
Electronic ISSN 1434-6052
Publisher SpringerOpen
Peer Reviewed Peer Reviewed
Volume 80
Issue 2
Article Number 83


Published Journal Article (910 Kb)

Publisher Licence URL

Copyright Statement
Open Access This article is distributed under the terms of the Creative<br /> Commons Attribution 4.0 International License (http://creativecomm<br />, which permits unrestricted use, distribution,<br /> and reproduction in any medium, provided you give appropriate credit<br /> to the original author(s) and the source, provide a link to the Creative<br /> Commons license, and indicate if changes were made.<br /> Funded by SCOAP3.

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