«Изучение трехчастичных распадов В-мезонов в эксперименте Большого адронного коллайдера, посвященном исследованию прелестных адронов

The corresponded study was conducted by Belle Collaboration. This research aims to obtain \ $B^{\pm}\to J/\psi\eta (\eta \to \gamma\gamma)K^{\pm}$ signal yield as well as $J/\psi\eta$ invariant mass spectrum. The analysis is based on a data sample collected by the LHCb experiment in proton-proton collisions corresponding to 9 $\text{fb}^{-1}$ of integrated luminosity at centre-of-mass energies of 7, 8 and 13 TeV.