Observation of the $B^{+}\to J/\psi {\eta }^{\prime }{K}^{+}$ decay

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1049

The $B^{+}\to J/\psi {\eta }^{\prime }{K}^{+}$ decay is observed for the first time using proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of 7, 8,…