dc.contributor.author | Hayrapetyan, A. | |
dc.contributor.author | Tumasyan, A. | |
dc.contributor.author | Adam, W. | |
dc.contributor.author | Andrejkovic, J. W. | |
dc.contributor.author | Bergauer, T. | |
dc.contributor.author | Chatterjee, S. | |
dc.contributor.author | Damanakis, K. | |
dc.contributor.author | Dragicevic, M. | |
dc.contributor.author | Del Valle, A. Escalante | |
dc.contributor.author | Hussain, P. S. | |
dc.contributor.author | Jeitler, M. | |
dc.contributor.author | Krammer, N. | |
dc.contributor.author | Finger, Michael | |
dc.contributor.author | Finger, Miroslav | |
dc.contributor.author | Kveton, Antonin | |
dc.date.accessioned | 2024-03-04T09:12:30Z | |
dc.date.available | 2024-03-04T09:12:30Z | |
dc.date.issued | 2023 | |
dc.identifier.uri | https://hdl.handle.net/20.500.14178/2320 | |
dc.description.abstract | A 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.iso | en | |
dc.relation.url | https://doi.org/10.1103/PhysRevLett.131.091903 | |
dc.rights | Creative Commons Uveďte původ 4.0 International | cs |
dc.rights | Creative Commons Attribution 4.0 International | en |
dc.title | Observation of the Rare Decay of the η Meson to Four Muons | en |
dcterms.accessRights | restrictedAccess | |
dcterms.license | https://creativecommons.org/licenses/by/4.0/legalcode | |
dc.date.updated | 2024-03-04T09:12:30Z | |
dc.subject.keyword | CMS | en |
dc.subject.keyword | Rare Decay Meson | en |
dc.subject.keyword | Four Muons | en |
dc.relation.fundingReference | info:eu-repo/grantAgreement/MSM/LG/LG14004 | |
dc.relation.fundingReference | info:eu-repo/grantAgreement/MSM/LM/LM2018104 | |
dc.date.embargoStartDate | 2024-03-04 | |
dc.type.obd | 73 | |
dc.type.version | info:eu-repo/semantics/publishedVersion | |
dc.identifier.doi | 10.1103/PhysRevLett.131.091903 | |
dc.identifier.utWos | 001085068700002 | |
dc.identifier.eidScopus | 2-s2.0-85171697132 | |
dc.identifier.obd | 644313 | |
dc.identifier.pubmed | 37721839 | |
dc.subject.rivPrimary | 10000::10300 | |
dcterms.isPartOf.name | Physical Review Letters | |
dcterms.isPartOf.issn | 0031-9007 | |
dcterms.isPartOf.journalYear | 2023 | |
dcterms.isPartOf.journalVolume | 131 | |
dcterms.isPartOf.journalIssue | 9 | |
uk.faculty.primaryId | 116 | |
uk.faculty.primaryName | Matematicko-fyzikální fakulta | cs |
uk.faculty.primaryName | Faculty of Mathematics and Physics | en |
uk.department.primaryId | 1251 | |
uk.department.primaryName | Katedra fyziky nízkých teplot | cs |
uk.department.primaryName | Department of Low Temperature Physics | en |
dc.type.obdHierarchyCs | ČLÁNEK V ČASOPISU::článek v časopisu::původní článek | cs |
dc.type.obdHierarchyEn | JOURNAL ARTICLE::journal article::original article | en |
dc.type.obdHierarchyCode | 73::152::206 | en |
uk.displayTitle | Observation of the Rare Decay of the η Meson to Four Muons | en |