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Please use this identifier to cite or link to this item: https://elib.bsu.by/handle/123456789/261036
Title: Study of the B +→ J / ψ Λ ¯ p decay in proton-proton collisions at √s = 8 TeV
Authors: Drugakov, V.
Mossolov, V.
Suarez Gonzalez, J.
CMS Collaboration
Keywords: ЭБ БГУ::ЕСТЕСТВЕННЫЕ И ТОЧНЫЕ НАУКИ::Физика
Issue Date: 2019
Publisher: Springer
Citation: J High Energy Phys 2019;2019(12).
Abstract: A study of the B +→ J / ψ Λ ¯ 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 / ψ Λ ¯ , J/ψp, and Λ ¯ p systems produced in the B +→ J / ψ Λ¯ 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
URI: https://elib.bsu.by/handle/123456789/261036
Scopus: 10.1007/JHEP12(2019)100
metadata.dc.identifier.scopus: 85076606991
Sponsorship: Horizon 2020 Framework Programme (H2020), 675440,765710; Science and Technology Facilities Council (STFC), ST/N000242/1
Appears in Collections:Статьи НИУ «Институт ядерных проблем»

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