CMS pythia 8 colour reconnection tunes based on underlying-event data
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10052_2023_Article_11630.pdf
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Author(s)
Tumasyan, A.
Adam, W.
Andrejkovic, J. W.
Bergauer, T.
Chatterjee, S.
Damanakis, K.
Dragicevic, M.
Valle, A. E. D.
Frühwirth, R.
Jeitler, M.
Date Issued
July 10, 2023
Publisher
Springer Berlin Heidelberg
Citation
The European Physical Journal C. 2023 Jul 10;83(7):587
Version
Final published version
Abstract
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
$$\sqrt{s}=7$$
s
=
7
and 13
$$\,\text {Te\hspace{-.08em}V}$$
Te
V
, and by the CDF experiment at 1.96
$$\,\text {Te\hspace{-.08em}V}$$
Te
V
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
$$\,\text {Te\hspace{-.08em}V}$$
Te
V
including measurements of the underlying-event, strange-particle multiplicities, jet substructure observables, jet shapes, and colour flow in top quark pair (
$${{\text {t}} {}{\bar{\text {t}}}}$$
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
$${{\text {t}} {}{\bar{\text {t}}}}$$
t
t
¯
events in the semileptonic channel at 13
$$\,\text {Te\hspace{-.08em}V}$$
Te
V
.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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Creative Commons Attribution
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DOI of Published Version
https://doi.org/10.1140/epjc/s10052-023-11630-8
