Abstract
Masses of heavy baryons are calculated in the framework of the relativistic quark-diquark picture and QCD. The obtained results are in good agreement with available experimental data including recent measurements by the LHCb Collaboration. Possible quantum numbers of excited heavy baryon states are discussed.
Highlights
Significant experimental progress has been achieved in studying heavy baryon spectroscopy
The main contribution was made by the LHCb Collaboration
Narrow excited Ωc states decaying to Ξ+
Summary
Significant experimental progress has been achieved in studying heavy baryon spectroscopy. Many new heavy baryon states have been observed. Λc excited states and allowed precise measurement of their masses and decay widths [1] — the Λc (2880)+. In 2018, the new Ξb (6227) resonance was observed as a peak in both the Λb K and Ξb π invariant mass spectra [6]. The first observation of two structures Σ(6097)± , consistent with resonances in the final states Λ0b π − and Λ0b π + was reported by the LHCb [7] and two new resonances Λb (6146) and Λb (6152) were found in the Λ0b π + π − system [8]. We compare these new data with the predictions of the relativistic quark-diquark model of heavy baryons [9,10,11,12]
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