Study of the B+→J/ψΛ¯p decay in proton-proton collisions at √s =8 TeV
dc.contributor.author | Sirunyan, A. M. | pt_BR |
dc.contributor.author | Silveira, Gustavo Gil da | pt_BR |
dc.contributor.author | CMS Collaboration | pt_BR |
dc.date.accessioned | 2020-07-23T03:40:43Z | pt_BR |
dc.date.issued | 2019 | pt_BR |
dc.identifier.issn | 1029-8479 | pt_BR |
dc.identifier.uri | http://hdl.handle.net/10183/212361 | pt_BR |
dc.description.abstract | A study of the B+→J/ψΛ¯p decay using proton-proton collision data collected at s√ = 8 TeV by the CMS experiment at the LHC, corresponding to an integrated luminosity of 19.6 fb−1, is presented. The ratio of branching fractions B(B+→J/ψΛ¯p)/B(B+→J/ψK∗(892)+) is measured to be (1.054 ± 0.057(stat) ± 0.035(syst) ± 0.011(B))%, where the last uncertainty reflects the uncertainties in the world-average branching fractions of Λ¯ and K*(892) + decays to reconstructed final states. The invariant mass distributions of the J/ψΛ¯ J/ψp, and Λ¯p systems produced in the B+→J/ψΛ¯p decay are investigated and found to be inconsistent with the pure phase space hypothesis. The analysis is extended by using a model-independent angular amplitude analysis, which shows that the observed invariant mass distributions are consistent with the contributions from excited kaons decaying to the Λ¯p system. | en |
dc.format.mimetype | application/pdf | pt_BR |
dc.language.iso | eng | pt_BR |
dc.relation.ispartof | The journal of high energy physics. Trieste. No. 12 (Dec. 2019), 100, 38 p. | pt_BR |
dc.rights | Open Access | en |
dc.subject | B physics | en |
dc.subject | Aceleradores de partículas | pt_BR |
dc.subject | Colisões proton-proton | pt_BR |
dc.subject | Hadron-Hadron scattering (experiments) | en |
dc.title | Study of the B+→J/ψΛ¯p decay in proton-proton collisions at √s =8 TeV | pt_BR |
dc.type | Artigo de periódico | pt_BR |
dc.identifier.nrb | 001114865 | pt_BR |
dc.type.origin | Estrangeiro | pt_BR |
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