CMS PYTHIA 8 Colour Reconnection Tunes based on Underlying-Event Data
The European Physical Journal C 2023
Kārlis Dreimanis, Viesturs Veckalns, CMS Collaboration

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 13TeV , and by the CDF experiment at 1.96TeV 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 13TeV including measurements of the underlying-event, strange-particle multiplicities, jet substructure observables, jet shapes, and colour flow in top quark pair (tt¯ ) 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 tt¯ events in the semileptonic channel at 13TeV .


DOI
10.1140/epjc/s10052-023-11630-8
Hipersaite
https://link.springer.com/article/10.1140/epjc/s10052-023-11630-8

The CMS Collaboration, A.Tumasyan, K.Dreimanis, V.Veckalns ... [et al.]. CMS PYTHIA 8 Colour Reconnection Tunes based on Underlying-Event Data. The European Physical Journal C, 2023, Vol. 83, No. 7, Article number 587. ISSN 1434-6044. e-ISSN 1434-6052. Pieejams: doi:10.1140/epjc/s10052-023-11630-8

Publikācijas valoda
English (en)
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