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Development and validation of HERWIG 7 tunes from CMS underlying-event measurements

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This paper presents new sets of parameters (“tunes”) for the underlying-event model of the HERWIG7 event generator. These parameters control the description of multiple-parton interactions (MPI) and colour reconnection in HERWIG7, and are obtained from a fit to minimum-bias data collected by the CMS experiment at s=0.9, 7, and 13Te. The tunes are based on the NNPDF 3.1 next-to-next-to-leading-order parton distribution function (PDF) set for the parton shower, and either a leading-order or next-to-next-to-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 for minimum-bias, inclusive jet, top quark pair, and Z and W boson 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. © 2021, CERN for the benefit of the CMS collaboration.

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AlanDeğerDil
dc.contributor.authorSirunyan, A.M.
dc.contributor.authorTumasyan, A.
dc.contributor.authorAdam, W.
dc.contributor.authorAmbrogi, F.
dc.contributor.authorBergauer, T.
dc.contributor.authorDragicevic, M.
dc.contributor.authorErö, J.
dc.contributor.authorEscalante Del Valle, A.
dc.contributor.authorFrühwirth, R.
dc.contributor.authorJeitler, M.
dc.contributor.authorKrammer, N.
dc.contributor.authorLechner, L.
dc.contributor.authorLiko, D.
dc.contributor.authorMadlener, T.
dc.contributor.authorMikulec, I.
dc.contributor.authorPitters, F.M.
dc.contributor.authorRad, N.
dc.contributor.authorSchieck, J.
dc.contributor.authorSchöfbeck, R.
dc.contributor.authorSpanring, M.
dc.contributor.authorTempl, S.
dc.contributor.authorWaltenberger, W.
dc.contributor.authorWulz, C.-E.
dc.contributor.authorZarucki, M.
dc.contributor.authorChekhovsky, V.
dc.contributor.authorLitomin, A.
dc.contributor.authorMakarenko, V.
dc.contributor.authorSuarez Gonzalez, J.
dc.contributor.authorDarwish, M.R.
dc.contributor.authorDe Wolf, E.A.
dc.contributor.authorCroce, D. Di
dc.contributor.authorJanssen, X.
dc.contributor.authorKello, T.
dc.contributor.authorLelek, A.
dc.contributor.authorPieters, M.
dc.contributor.authorSfar, H. Rejeb
dc.contributor.authorVan Haevermaet, H.
dc.contributor.authorVan Mechelen, P.
dc.contributor.authorVan Putte, S.
dc.contributor.authorVan Remortel, N.
dc.contributor.authorBlekman, F.
dc.contributor.authorBols, E.S.
dc.contributor.authorChhibra, S.S.
dc.contributor.authorD’Hondt, J.
dc.contributor.authorDe Clercq, J.
dc.contributor.authorLontkovskyi, D.
dc.contributor.authorLowette, S.
dc.contributor.authorMarchesini, I.
dc.contributor.authorMoortgat, S.
dc.contributor.authorMorton, A.
dc.date.accessioned2026-10-18T20:28:19.779176404Z
dc.date.available2026-10-18T20:28:19.779176404Z
dc.date.issued2021
dc.description.abstractThis paper presents new sets of parameters (“tunes”) for the underlying-event model of the HERWIG7 event generator. These parameters control the description of multiple-parton interactions (MPI) and colour reconnection in HERWIG7, and are obtained from a fit to minimum-bias data collected by the CMS experiment at s=0.9, 7, and 13Te. The tunes are based on the NNPDF 3.1 next-to-next-to-leading-order parton distribution function (PDF) set for the parton shower, and either a leading-order or next-to-next-to-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 for minimum-bias, inclusive jet, top quark pair, and Z and W boson 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. © 2021, CERN for the benefit of the CMS collaboration.
dc.description.sponsorshipWe congratulate our colleagues in the CERN accelerator departments for the excellent performance of the LHC and thank the technical and administrative staffs at CERN and at other CMS institutes for their contributions to the success of the CMS effort. In addition, we gratefully acknowledge the computing centres and personnel of the Worldwide LHC Computing Grid for delivering so effectively the computing infrastructure essential to our analyses. Finally, we acknowledge the enduring support for the construction and operation of the LHC and the CMS detector provided by the following funding agencies: BMBWF and FWF (Austria); FNRS and FWO (Belgium); CNPq, CAPES, FAPERJ, FAPERGS, and FAPESP (Brazil); MES (Bulgaria); CERN; CAS, MoST, and NSFC (China); COLCIENCIAS (Colombia); MSES and CSF (Croatia); RIF (Cyprus); SENESCYT (Ecuador); MoER, ERC PUT and ERDF (Estonia); Academy of Finland, MEC, and HIP (Finland); CEA and CNRS/IN2P3 (France); BMBF, DFG, and HGF (Germany); GSRT (Greece); NKFIA (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); MSIP and NRF (Republic of Korea); MES (Latvia); LAS (Lithuania); MOE and UM (Malaysia); BUAP, CINVESTAV, CONACYT, LNS, SEP, and UASLP-FAI (Mexico); MOS (Montenegro); MBIE (New Zealand); PAEC (Pakistan); MSHE and NSC (Poland); FCT (Portugal); JINR (Dubna); MON, RosAtom, RAS, RFBR, and NRC KI (Russia); MESTD (Serbia); SEIDI, CPAN, PCTI, and FEDER (Spain); MOSTR (Sri Lanka); Swiss Funding Agencies (Switzerland); MST (Taipei); ThEPCenter, IPST, STAR, and NSTDA (Thailand); TUBITAK and TAEK (Turkey); NASU (Ukraine); STFC (United Kingdom); DOE and NSF (USA). Individuals have received support from the Marie-Curie programme and the European Research Council and Horizon 2020 Grant, contract Nos. 675440, 724704, 752730, and 765710 (European Union); the Leventis Foundation; the A.P. Sloan Foundation; the Alexander von Humboldt Foundation; the Belgian Federal Science Policy Office; the Fonds pour la Formation \u00E0 la Recherche dans l\u2019Industrie et dans l\u2019Agriculture (FRIA-Belgium); the Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium); the F.R.S.-FNRS and FWO (Belgium) under the \u201CExcellence of Science \u2013 EOS\u201D \u2013 be.h project n. 30820817; the Beijing Municipal Science & Technology Commission, No. Z191100007219010; the Ministry of Education, Youth and Sports (MEYS) of the Czech Republic; the Deutsche Forschungsgemeinschaft (DFG) under Germany\u2019s Excellence Strategy \u2013 EXC 2121 \u201CQuantum Universe\u201D \u2013 390833306; the Lend\u00FClet (\u201CMomentum\u201D) Programme and the J\u00E1nos Bolyai Research Scholarship of the Hungarian Academy of Sciences, the New National Excellence Program \u00DANKP, the NKFIA research grants 123842, 123959, 124845, 124850, 125105, 128713, 128786, and 129058 (Hungary); the Council of Science and Industrial Research, India; the HOMING PLUS programme of the Foundation for Polish Science, cofinanced from European Union, Regional Development Fund, the Mobility Plus programme of the Ministry of Science and Higher Education, the National Science Center (Poland), contracts Harmonia 2014/14/M/ST2/00428, Opus 2014/13/B/ST2/02543, 2014/15/B/ST2/03998, and 2015/19/B/ST2/02861, Sonata-bis 2012/07/E/ST2/01406; the National Priorities Research Program by Qatar National Research Fund; the Ministry of Science and Higher Education, project no. 02.a03.21.0005 (Russia); the Tomsk Polytechnic University Competitiveness Enhancement Program; the Programa Estatal de Fomento de la Investigaci\u00F3n Cient\u00EDfica y T\u00E9cnica de Excelencia Mar\u00EDa de Maeztu, grant MDM-2015-0509 and the Programa Severo Ochoa del Principado de Asturias; the Thalis and Aristeia programmes cofinanced by EU-ESF and the Greek NSRF; the Rachadapisek Sompot Fund for Postdoctoral Fellowship, Chulalongkorn University and the Chulalongkorn Academic into Its 2nd Century Project Advancement Project (Thailand); the Kavli Foundation; the Nvidia Corporation; the SuperMicro Corporation; the Welch Foundation, contract C-1845; and the Weston Havens Foundation (USA).
dc.identifier.doi10.1140/epjc/s10052-021-08949-5
dc.identifier.issn1434-6044
dc.identifier.issue4
dc.identifier.pmcidPMC8550252
dc.identifier.pmid34727148
dc.identifier.scopus2-s2.0-85104366975
dc.identifier.startpage312
dc.identifier.urihttps://rdlopen.rawdatalibrary.net/r/ebyu/13496
dc.identifier.volume81
dc.language.isoen
dc.publisherSpringer Nature
dc.relation.ispartofEuropean Physical Journal C
dc.rightsinfo:eu-repo/semantics/openAccess
dc.titleDevelopment and validation of HERWIG 7 tunes from CMS underlying-event measurements
dc.typeArticle
dspace.entity.typePublication
rdl.citation.scopus41
rdl.departmentErzincan Binali Yildirim University, Erzincan, Turkey.
rdl.oa.statusgold
rdl.source.indexSCOPUS
rdl.source.indexPUBMED