Using proton-proton collision data, corresponding to an integrated luminosity of 9 fb−1 collected with the LHCb detector, seven decay modes of the Bc+ meson into a J/ψ or ψ(2S) meson and three charged hadrons, kaons or pions, are studied. The decays Bc+ → (ψ(2S) → J/ψπ+π−)π+, Bc+ → ψ(2S)π+π−π+, Bc+ → J/ψK+π−π+ and Bc+ → J/ψK+K−K+ are observed for the first time, and evidence for the Bc+ → ψ(2S)K+K−π+, decay is found, where J/ψ and ψ(2S) mesons are reconstructed in their dimuon decay modes. The ratios of branching fractions between the different Bc+ decays are reported as well as the fractions of the decays proceeding via intermediate resonances. The results largely support the factorisation approach used for a theoretical description of the studied decays. [Figure not available: see fulltext.]

Study of Bc+ decays to charmonia and three light hadrons / R. Aaij, A.S.W.A.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2022:1(2022 Jan 13), pp. 65.1-65.28. [10.1007/JHEP01(2022)065]

Study of Bc+ decays to charmonia and three light hadrons

D. Marangotto;A. Merli;N. Neri;E. Spadaro Norella;
2022

Abstract

Using proton-proton collision data, corresponding to an integrated luminosity of 9 fb−1 collected with the LHCb detector, seven decay modes of the Bc+ meson into a J/ψ or ψ(2S) meson and three charged hadrons, kaons or pions, are studied. The decays Bc+ → (ψ(2S) → J/ψπ+π−)π+, Bc+ → ψ(2S)π+π−π+, Bc+ → J/ψK+π−π+ and Bc+ → J/ψK+K−K+ are observed for the first time, and evidence for the Bc+ → ψ(2S)K+K−π+, decay is found, where J/ψ and ψ(2S) mesons are reconstructed in their dimuon decay modes. The ratios of branching fractions between the different Bc+ decays are reported as well as the fractions of the decays proceeding via intermediate resonances. The results largely support the factorisation approach used for a theoretical description of the studied decays. [Figure not available: see fulltext.]
B physics; Branching fraction; Flavor physics; Hadron-Hadron scattering (experiments);
Settore FIS/01 - Fisica Sperimentale
Settore FIS/04 - Fisica Nucleare e Subnucleare
13-gen-2022
Article (author)
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/921732
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