Observation of new baryons in the ${\Xi }_b^{-}{\pi }^{+}{\pi }^{-}$ and ${\Xi }_b^0{\pi }^{+}{\pi }^{-}$ systems

Abstract

The first observation and study of two new baryonic structures in the final state ${\Xi }_b^0{\pi }^{+}{\pi }^{-}$ and the confirmation of the ${\Xi }_b(6100{)}^{-}$ state in the ${\Xi }_b^{-}{\pi }^{+}{\pi }^{-}$ 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 ${\Xi }_b^{\ast 0}$, ${\Xi }_b^{{}^{\prime }-}$ and ${\Xi }_b^{\ast -}$ resonances are measured with improved precision. The new decay mode of the ${\Xi }_b^0$ baryon to the ${\Xi }_c^{+}{\pi }^{-}{\pi }^{+}{\pi }^{-}$ final state is observed and exploited for the first time in these measurements.

All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2023-008.html

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Cited by in corpus (11)

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• 70 Years of Hyperon Spectroscopy: A review of strange $\Xi$, $\Omega$ baryons, and the spectrum of charmed and bottom baryons
• Predicted ${\Xi }_b(6087{)}^0$ and further predictions
• Decay widths and mass spectra of single bottom baryons
• Heavy-quark dominance and fine structure of excited heavy baryons ${\Sigma }_Q$, ${\Xi }_Q^{\prime }$ and ${\Omega }_Q$
• Systematic analysis of the mass spectra of triply heavy baryons
• Observation of the ${\Xi }_{\mathrm{b}}^{-}$ $\to$ $\psi$(2S)${\Xi }^{-}$ decay and studies of the ${\Xi }_{\mathrm{b}}$(5945)${}^0$ baryon in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Mass spectra of singly heavy baryons in the relativized quark model with heavy-quark dominance
• Spectroscopic properties of $1F$-wave singly bottom baryons
• Chiral effective theory of scalar and vector diquarks revisited
• Probing the inner structures of the observed ${\Xi }_b$ and ${\Xi }_b^{\prime }$ resonances