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dc.contributor.authorCMS Collaboration
dc.date.accessioned 2020-11-06T02:02:49Z
dc.date.available 2020-11-06T02:02:49Z
dc.date.issued 2020
dc.identifier.citation CMS Collaboration. "Observation of the B0s→X(3872)ϕ Decay." Physical Review Letters, 125, no. 15 (2020) American Physical Society: https://doi.org/10.1103/PhysRevLett.125.152001.
dc.identifier.urihttps://hdl.handle.net/1911/109524
dc.description.abstract Using a data sample of proton-proton collisions at √s=13  TeV, corresponding to an integrated luminosity of 140  fb−1 collected by the CMS experiment in 2016–2018, the B0s→X(3872)ϕ decay is observed. Decays into J/ψπ+π− and K+K− are used to reconstruct, respectively, the X(3872) and ϕ. The ratio of the product of branching fractions B[B0s→X(3872)ϕ]B[X(3872)→J/ψπ+π−] to the product B[B0s→ψ(2S)ϕ]B[ψ(2S)→J/ψπ+π−] is measured to be [2.21±0.29(stat)±0.17(syst)]%. The ratio B[B0s→X(3872)ϕ]/B[B0→X(3872)K0] is found to be consistent with one, while the ratio B[B0s→X(3872)ϕ]/B[B+→X(3872)K+] is two times smaller. This suggests a difference in the production dynamics of the X(3872) in B0 and B0s meson decays compared to B+. The reported observation may shed new light on the nature of the X(3872) particle.
dc.language.iso eng
dc.publisher American Physical Society
dc.rights Published by the American Physical Society under the terms of the 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.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.title Observation of the B0s→X(3872)ϕ Decay
dc.type Journal article
dc.citation.journalTitle Physical Review Letters
dc.citation.volumeNumber 125
dc.citation.issueNumber 15
dc.type.dcmi Text
dc.identifier.doihttps://doi.org/10.1103/PhysRevLett.125.152001
dc.type.publication publisher version
dc.citation.articleNumber 152001


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