Study of $$ {\mathrm{B}}_{\mathrm{c}}^{+} $$ decays to charmonia and three light hadrons

Journal article

A bstract Using proton-proton collision data, corresponding to an integrated luminosity of 9 fb − 1 collected with the LHCb detector, seven decay modes of the $$ {\mathrm{B}}_{\mathrm{c}}^{+} $$ Bc+ meson into a J / ψ or ψ(2S) meson and three charged hadrons, kaons or pions, are studied. The decays $$ {\mathrm{B}}_{\mathrm{c}}^{+} $$ Bc+ → (ψ(2S) → J / ψπ + π − )π + , $$ {\mathrm{B}}_{\mathrm{c}}^{+} $$ Bc+ → ψ(2S)π + π − π + , $$ {\mathrm{B}}_{\mathrm{c}}^{+} $$ Bc+ → J / ψK + π − π + and $$ {\mathrm{B}}_{\mathrm{c}}^{+} $$ Bc+ → J / ψK + K − K + are observed for the first time, and evidence for the $$ {\mathrm{B}}_{\mathrm{c}}^{+} $$ 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 $$ {\mathrm{B}}_{\mathrm{c}}^{+} $$ 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.

Authors: Aaij, R; Abdelmotteleb, ASW; Abellán Beteta, C; Abudinen Gallego, FJ; Ackernley, T

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: Springer
• Journal: Journal of High Energy Physics
• Volume: 2022
• Issue: 1
• Pages: 65
• Article number: 65
• Publication date: 2022-01-13
• DOI: 10.1007/jhep01(2022)065
• EISSN: 1029-8479
• ISSN: 1126-6708
• Language: English
• Keywords: Physics; Computer science; Algorithm