Search

The paper presents results of the search for new meson decays into charmonium and light hadrons in the final state. Relative branching fractions of the studied processes are measured. The contributions of intermediate resonant structures in light hadron systems are considered. Experimental data and theoretical predictions are compared for various mass combinations. The analysis is based on the data collected by the LHCb experiment in proton—proton collisions at the center-of-mass energies of 7, 8, and 13 TeV in the period from 2011 to 2018. [ABSTRACT FROM AUTHOR]

Using proton-proton collision data, collected by the LHCb experiment and corresponding to the integrated luminosity of 9 fb−1, the several new decays to charmonium and three light charged hadrons are observed. In particular, following channels are observed → ψ(2S)π+π−π+, → (ψ(2S) → J/ψπ+π−)π+, → J/ψK+π−π+, and → J/ψK+K−K+. The first evidence of the → ψ(2S)K+K−π+ decays is obtained. The branching fractions of these decays are measured with respect to the high-statistic normalization channels. [ABSTRACT FROM AUTHOR]