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Observation of the Rare Decay of the η Meson to Four Muons

dc.contributor.authorHayrapetyan, A.
dc.contributor.authorTumasyan, A.
dc.contributor.authorAdam, W.
dc.contributor.authorAndrejkovic, J. W.
dc.contributor.authorBergauer, T.
dc.contributor.authorChatterjee, S.
dc.contributor.authorDamanakis, K.
dc.contributor.authorDragicevic, M.
dc.contributor.authorDel Valle, A. Escalante
dc.contributor.authorHussain, P. S.
dc.contributor.authorJeitler, M.
dc.contributor.authorKrammer, N.
dc.contributor.authorFinger, Michael
dc.contributor.authorFinger, Miroslav
dc.contributor.authorKveton, Antonin
dc.date.accessioned2024-03-04T09:12:30Z
dc.date.available2024-03-04T09:12:30Z
dc.date.issued2023
dc.identifier.urihttps://hdl.handle.net/20.500.14178/2320
dc.description.abstractA search for the rare eta -> mu(+)mu(-)mu(+)mu(-) double-Dalitz decay is performed using a sample of proton-proton collisions, collected by the CMS experiment at the CERN LHC with high-rate muon triggers during 2017 and 2018 and corresponding to an integrated luminosity of 101 fb(-1). A signal having a statistical significance well in excess of 5 standard deviations is observed. Using the eta -> mu(+)mu(-) decay as normalization, the branching fraction B(eta -> mu(+)mu(-)mu(+)mu(-)) = [5.0 +/- 0.8(stat) +/- 0.7(syst) +/- 0.7(B-2 mu)] x 10(-9) is measured, where the last term is the uncertainty in the normalization channel branching fraction. This work achieves an improved precision of over 5 orders of magnitude compared to previous results, leading to the first measurement of this branching fraction, which is found to agree with theoretical predictions.en
dc.language.isoen
dc.relation.urlhttps://doi.org/10.1103/PhysRevLett.131.091903
dc.rightsCreative Commons Uveďte původ 4.0 Internationalcs
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.titleObservation of the Rare Decay of the η Meson to Four Muonsen
dcterms.accessRightsrestrictedAccess
dcterms.licensehttps://creativecommons.org/licenses/by/4.0/legalcode
dc.date.updated2024-03-04T09:12:30Z
dc.subject.keywordCMSen
dc.subject.keywordRare Decay Mesonen
dc.subject.keywordFour Muonsen
dc.relation.fundingReferenceinfo:eu-repo/grantAgreement/MSM/LG/LG14004
dc.relation.fundingReferenceinfo:eu-repo/grantAgreement/MSM/LM/LM2018104
dc.date.embargoStartDate2024-03-04
dc.type.obd73
dc.type.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.doi10.1103/PhysRevLett.131.091903
dc.identifier.utWos001085068700002
dc.identifier.eidScopus2-s2.0-85171697132
dc.identifier.obd644313
dc.identifier.pubmed37721839
dc.subject.rivPrimary10000::10300
dcterms.isPartOf.namePhysical Review Letters
dcterms.isPartOf.issn0031-9007
dcterms.isPartOf.journalYear2023
dcterms.isPartOf.journalVolume131
dcterms.isPartOf.journalIssue9
uk.faculty.primaryId116
uk.faculty.primaryNameMatematicko-fyzikální fakultacs
uk.faculty.primaryNameFaculty of Mathematics and Physicsen
uk.department.primaryId1251
uk.department.primaryNameKatedra fyziky nízkých teplotcs
uk.department.primaryNameDepartment of Low Temperature Physicsen
dc.type.obdHierarchyCsČLÁNEK V ČASOPISU::článek v časopisu::původní článekcs
dc.type.obdHierarchyEnJOURNAL ARTICLE::journal article::original articleen
dc.type.obdHierarchyCode73::152::206en
uk.displayTitleObservation of the Rare Decay of the η Meson to Four Muonsen


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