Observation of the decay $\Lambda^0_b\rightarrow\psi(2S)p\pi^-$.
Observation of the decay $\Lambda^0_b\rightarrow\psi(2S)p\pi^-$.
The Cabibbo-suppressed decay $\Lambda^0_b\rightarrow\psi(2S)p\pi^-$ is observed for the first time using a data sample collected by the LHCb experiment in proton-proton collisions corresponding to 1.0, 2.0 and 1.9fb$^{-1}$ of integrated luminosity at centre-of-mass energies of 7, 8 and 13TeV, respectively. The $\psi(2S)$ mesons are reconstructed in the $\mu^+\mu^-$ final state. …