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/ψ π+ π−)π+, Bc+ → ψ(2S) π+ π− π+, Bc+ → J/ψ K+ π− π+ and Bc+ → J/ψ K+ 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.

Study of Bc+ Decays to Charmonia and Three Light Hadrons

Calabrese, R.;Capriotti, L.;Couturier, B.;Fiorini, M.;Franzoso, E.;Giugliano, C.;Guarise, M.;Kotriakhova, S.;Luppi, E.;Okamura, S.;Pappalardo, L. L.;Passalacqua, B.;Tomassetti, L.;
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/ψ π+ π−)π+, Bc+ → ψ(2S) π+ π− π+, Bc+ → J/ψ K+ π− π+ and Bc+ → J/ψ K+ 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.
2022
Aaij, R.; Abdelmotteleb, A. S. W.; Abellán Beteta, C.; Abudinen Gallego, F. J.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Afsharnia, H.; Agapopoulou, C....espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/2500471
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