CMS PYTHIA 8 colour reconnection tunes based on underlying-event data
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Published version
Author(s)
Type
Journal Article
Abstract
New sets of parameter tunes for two of the colour
reconnection models, quantum chromodynamics-inspired
and gluon-move, implemented in the PYTHIA 8 event generator, are obtained based on the default CMS PYTHIA 8
underlying-event tune, CP5. Measurements sensitive to the
underlying event performed by the CMS experiment at
centre-of-mass energies √s = 7 and 13 TeV, and by the
CDF experiment at 1.96 TeV are used to constrain the parameters of colour reconnection models and multiple-parton
interactions simultaneously. The new colour reconnection
tunes are compared with various measurements at 1.96, 7, 8,
and 13 TeV including measurements of the underlying-event,
strange-particle multiplicities, jet substructure observables,
jet shapes, and colour flow in top quark pair (t¯t) events. The
new tunes are also used to estimate the uncertainty related to
colour reconnection modelling in the top quark mass measurement using the decay products of t¯t events in the semileptonic channel at 13 TeV.
reconnection models, quantum chromodynamics-inspired
and gluon-move, implemented in the PYTHIA 8 event generator, are obtained based on the default CMS PYTHIA 8
underlying-event tune, CP5. Measurements sensitive to the
underlying event performed by the CMS experiment at
centre-of-mass energies √s = 7 and 13 TeV, and by the
CDF experiment at 1.96 TeV are used to constrain the parameters of colour reconnection models and multiple-parton
interactions simultaneously. The new colour reconnection
tunes are compared with various measurements at 1.96, 7, 8,
and 13 TeV including measurements of the underlying-event,
strange-particle multiplicities, jet substructure observables,
jet shapes, and colour flow in top quark pair (t¯t) events. The
new tunes are also used to estimate the uncertainty related to
colour reconnection modelling in the top quark mass measurement using the decay products of t¯t events in the semileptonic channel at 13 TeV.
Date Issued
2023-07
Date Acceptance
2023-05-16
Citation
European Physical Journal C: Particles and Fields, 2023, 83 (7)
ISSN
1434-6052
Publisher
SpringerOpen
Journal / Book Title
European Physical Journal C: Particles and Fields
Volume
83
Issue
7
Copyright Statement
© CERN for the benefit of the CMS collaboration 2023 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
License URL
Identifier
https://link.springer.com/article/10.1140/epjc/s10052-023-11630-8
Subjects
Physical Sciences
Physics
Physics, Particles & Fields
Science & Technology
Publication Status
Published
Article Number
587
Date Publish Online
2023-07-10