Heavy flavour spectroscopy at LHCb. Contribution to the 2023 QCD session of the 57th Rencontres de Moriond

In this talk, we present the latest experimental results on heavy flavour spectroscopy at the LHCb detector. The first observation of two baryonic resonances is reported in the ${\mathrm{\Xi }}_b^{(-,0)}{\pi }^{+}{\pi }^{-}$ final states and a study of charmonium decays to $K_s^{0}K\pi$ in $B\to (K_s^{0}K\pi )K$ decays is presented.