Measurement of inclusive production of charmonium states in $b$-hadron decays via their decay into $\varphi \varphi$

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1176

The inclusive production of the ${\eta }_c(1S)$, ${\eta }_c(2S)$ and ${\chi }_c$ charmonium states in $b$-hadron decays is studied with LHCb Run~2 data, corresponding to an integrated luminosity o…