Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/5911
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dc.contributor.authorCMS Collaboration-
dc.contributor.authorKarapınar, Güler-
dc.date.accessioned2017-07-11T06:45:10Z-
dc.date.available2017-07-11T06:45:10Z-
dc.date.issued2015-06-
dc.identifier.citationKhachatryan, V., Sirunyan, A.M., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M.,...CMS Collaboration (2015). Observation of the rare B0s→μ+μ- decay from the combined analysis of CMS and LHCb data. Nature, 522(7554), 68-72. doi:10.1038/nature14474en_US
dc.identifier.issn0028-0836-
dc.identifier.issn1476-4687-
dc.identifier.urihttp://doi.org/10.1038/nature14474-
dc.identifier.urihttp://hdl.handle.net/11147/5911-
dc.description.abstractThe standard model of particle physics describes the fundamental particles and their interactions via the strong, electromagnetic and weak forces. It provides precise predictions for measurable quantities that can be tested experimentally. The probabilities, or branching fractions, of the strangeB meson (B0 s ) andtheB0meson decaying into two oppositely charged muons (μ+ and μ-) are especially interesting because of their sensitivity to theories that extend the standard model. The standard model predicts that the B0s→μ+μ- and B0s→μ+μ- decays are very rare, with about four of the former occurring for every billion B0 s mesons produced, and one of the latter occurring for every ten billion B0 mesons1. A difference in the observed branching fractions with respect to the predictions of the standard model would provide a direction in which the standard model should be extended. Before the Large Hadron Collider (LHC) at CERN2 started operating, no evidence for either decay mode had been found. Upper limits on the branching fractions were an order of magnitude above the standard model predictions. The CMS (CompactMuonSolenoid) andLHCb(LargeHadronCollider beauty) collaborations have performed a joint analysis of the data from proton'proton collisions that they collected in 2011 at a centre-ofmass energy of seven teraelectronvolts and in 2012 at eight teraelectronvolts. Here we report the first observation of the B0s→μ+μ- decay, with a statistical significance exceeding six standard deviations, and the best measurement so far of its branching fraction. Furthermore, we obtained evidence for the B0s→μ+μ- decay with a statistical significance of three standard deviations. Both measurements are statistically compatible with standard model predictions and allow stringent constraints to be placed on theories beyond the standardmodel. The LHCexperimentswill resume taking data in 2015, recording proton'proton collisions at a centre-of-mass energy of 13 teraelectronvolts, which will approximately double the production rates of B0s and B0 mesons and lead to further improvements in the precision of these crucial tests of the standard model. © 2015 Macmillan Publishers Limited. All rights reserved.en_US
dc.description.sponsorshipThe Scientific and Technical Research Council of Turkey, and Turkish Atomic Energy Authorityen_US
dc.language.isoenen_US
dc.publisherNature Publishing Groupen_US
dc.relation.ispartofNatureen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectLarge Hadron Collider (LHC)en_US
dc.subjectCompact Muon Solenoiden_US
dc.subjectProtonen_US
dc.subjectElectromagnetic fielden_US
dc.subjectElementary particlesen_US
dc.titleObservation of the rare B0s??+?- decay from the combined analysis of CMS and LHCb dataen_US
dc.typeArticleen_US
dc.institutionauthorKarapınar, Güler-
dc.departmentIzmir Institute of Technology. Mathematicsen_US
dc.identifier.volume522en_US
dc.identifier.issue7554en_US
dc.identifier.startpage68en_US
dc.identifier.endpage72en_US
dc.identifier.wosWOS:000355543400030en_US
dc.identifier.scopus2-s2.0-84930946686en_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.identifier.doi10.1038/nature14474-
dc.identifier.pmid26047778en_US
dc.relation.doi10.1038/nature14474en_US
dc.coverage.doi10.1038/nature14474en_US
item.openairetypeArticle-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.languageiso639-1en-
item.fulltextWith Fulltext-
item.grantfulltextopen-
item.cerifentitytypePublications-
crisitem.author.dept04.02. Department of Mathematics-
Appears in Collections:Mathematics / Matematik
PubMed İndeksli Yayınlar Koleksiyonu / PubMed Indexed Publications Collection
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection
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