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Observation of Two Excited Bc+ States and Measurement of the Bc+ (2S) Mass in pp Collisions at s =13 TeV
dc.contributor | CMS Collaboration | |
dc.creator | Sirunyan, A. M. | |
dc.creator | Tumasyan, A. | |
dc.creator | Adam, W. | |
dc.creator | Ambrogi, F. | |
dc.creator | Adžić, Petar | |
dc.creator | Ćirković, Predrag | |
dc.creator | Devetak, Damir | |
dc.creator | Đorđević, Miloš | |
dc.creator | Milenović, Predrag | |
dc.creator | Milošević, Jovan | |
dc.creator | Stojanović, Milan | |
dc.date.accessioned | 2019-06-26T12:24:02Z | |
dc.date.available | 2019-06-26T12:24:02Z | |
dc.date.issued | 2019 | |
dc.identifier.issn | 0031-9007 | |
dc.identifier.issn | 1079-7114 | |
dc.identifier.uri | https://vinar.vin.bg.ac.rs/handle/123456789/8141 | |
dc.description.abstract | Signals consistent with the Bc+(2S) and Bc∗+(2S) states are observed in proton-proton collisions at s=13 TeV, in an event sample corresponding to an integrated luminosity of 143 fb-1, collected by the CMS experiment during the 2015-2018 LHC running periods. These excited bc states are observed in the Bc+π+π- invariant mass spectrum, with the ground state Bc+ reconstructed through its decay to J/ψπ+. The two states are reconstructed as two well-resolved peaks, separated in mass by 29.1±1.5(stat)±0.7(syst) MeV. The observation of two peaks, rather than one, is established with a significance exceeding five standard deviations. The mass of the Bc+(2S) meson is measured to be 6871.0±1.2(stat)±0.8(syst)±0.8(Bc+) MeV, where the last term corresponds to the uncertainty in the world-average Bc+ mass. © 2019 CERN for the CMS Collaboration. Published by the American Physical Society under the terms of the »https://creativecommons.org/licenses/by/4.0/» Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. | |
dc.language.iso | en | |
dc.rights | openAccess | |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | |
dc.source | Physical Review Letters | |
dc.title | Observation of Two Excited Bc+ States and Measurement of the Bc+ (2S) Mass in pp Collisions at s =13 TeV | en |
dc.type | article | en |
dc.rights.license | BY | |
dcterms.abstract | Aмброги, Ф; Тумасyан, A; Стојановиц, М; Миленовиц, П; Дордевиц, М; Деветак, Д; Цирковиц, П; Aдам, W; Сирунyан, A М; Милосевиц, Ј; Aдзиц, П; | |
dc.citation.volume | 122 | |
dc.citation.issue | 13 | |
dc.identifier.wos | 000463900300005 | |
dc.identifier.doi | 10.1103/PhysRevLett.122.132001 | |
dc.citation.rank | aM21 | |
dc.identifier.pmid | 31012626 | |
dc.contributor.count | CMS Collaboration (ukupan broj autora: 2290) | |
dc.type.version | publishedVersion | |
dc.identifier.scopus | 2-s2.0-85064123792 | |
dc.identifier.fulltext | https://vinar.vin.bg.ac.rs//bitstream/id/11331/PhysRevLett.122.132001.pdf |
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