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Title
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Development and validation of HERWIG 7 tunes from CMS underlying-event measurements
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Author
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Institution/Organisation
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CMS Collaboration
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Abstract
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| This paper presents new sets of parameters ("tunes") for the underlying-event model of the herwig 7 event generator. These parameters control the description of multiple-parton interactions (MPI) and colour reconnection in herwig 7, and are obtained from a fit to minimum-bias data collected by the CMS experiment at v s = 0.9, 7, and 13 TeV. The tunes are based on the NNPDF3.1 next-to-nextto-leading-order parton distribution function (PDF) set for the parton shower, and either a leading-order or next-to-nextto-leading-order PDF set for the simulation of MPI and the beam remnants. Predictions utilizing the tunes are produced for event shape observables in electron-positron collisions, and forminimum-bias, inclusive jet, top quark pair, and Zand Wboson events in proton-proton collisions, and are compared with data. Each of the new tunes describes the data at a reasonable level, and the tunes using a leading-order PDF for the simulation of MPI provide the best description of the data. |
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Language
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English
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Source (journal)
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European physical journal : C : particles and fields. - Berlin
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Publication
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Berlin
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2021
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ISSN
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1434-6044
1434-6052
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DOI
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10.1140/EPJC/S10052-021-08949-5
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Volume/pages
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81
:4
(2021)
, 47 p.
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Article Reference
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312
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ISI
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000639810800002
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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Full text (open access)
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