Camboni, AlessandroCoquereau, SamuelGarrido Beltrán, LluísGascón Fora, DavidGraciani Díaz, RicardoGraugés Pous, EugeniMarin Benito, CarlaPicatoste Olloqui, EduardoRives Molina, Vicente JoséAlfonso Albero, AlejandroCalvo Gomez, M.Gironella Gironell, PereVazquez Gomez, R.LHCb Collaboration2022-06-072022-06-072017-021434-6044https://hdl.handle.net/2445/186400The decays B ^+ → J/ψ 3π ^+ 2π ^- and B ^+ → ψ (2S) π ^+ π ^+ π ^- are observed for the first time using a data sample corresponding to an integrated luminosity of 3.0 fb^-1, collected by the LHCb experiment in proton-proton collisions at the centre-of-mass energies of 7 and 8 TeV. The branching fractions relative to that of B ^+ → ψ (2S) K ^+ are measured to be dfrac B ( B ^+ → J/ψ 3π ^+ 2π ^- )B ( B ^+ → ψ (2S) K ^+ )= & ( 1.88± 0.17± 0.09)× 10^-2, dfrac B ( B ^+ → ψ (2S) π ^+ π ^+ π ^- )B ( B ^+ → ψ (2S) K ^+ )= & ( 3.04± 0.50± 0.26)× 10^-2, where the first uncertainties are statistical and the second are systematic.19 p.application/pdfengcc-by (c) Camboni, Alessandro et al., 2017https://creativecommons.org/licenses/by/4.0/HadronsGran Col·lisionador d'HadronsFísica de partículesExperimentsHadronsLarge Hadron Collider (France and Switzerland)Particle physicsExperimentsinfo:eu-repo/semantics/article6779712022-06-07info:eu-repo/semantics/openAccess