The first observation and study of two new baryonic structures in the final state ${\mathrm{\Xi }}_b^0{\pi }^{+}{\pi }^{-}$ and the confirmation of the ${\mathrm{\Xi }}_b{(6100)}^{-}$ state in the ${\mathrm{\Xi }}_b^{-}{\pi }^{+}{\pi }^{-}$ decay mode are reported using proton-proton collision data collected by the LHCb experiment, corresponding to an integrated luminosity of $9{\mathrm{fb}}^{-1}$. In addition, the properties of the known ${\mathrm{\Xi }}_b^{*0}$, ${\mathrm{\Xi }}_b^{\prime -}$ and ${\mathrm{\Xi }}_b^{*-}$ resonances are measured with improved precision. The new decay mode of the ${\mathrm{\Xi }}_b^0$ baryon to the ${\mathrm{\Xi }}_c^{+}$ ${\pi }^{-}$ ${\pi }^{+}$ ${\pi }^{-}$ final state is observed and exploited for the first time in these measurements.

• Received 30 July 2023
• Accepted 14 September 2023

DOI:https://doi.org/10.1103/PhysRevLett.131.171901

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