“School of Particles And Accelerator”
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| Paper IPM / Particles And Accelerator / 16204 |
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The aim of the present article is investigation of the newly observed resonances Ξc(2923)0, Ξc(2939)0, and Ξc(2965)0 which are real candidates to charm-strange baryons. To this end, we calculate the mass and pole residue of the orbitally and radially excited spin-1/2 flavor-sextet and spin-3/2 baryons Ξc0 ′ and Ξc∗0 with quark content csd . Spectroscopic parameters of these particles are computed in the context of the QCD two-point sum rule method. Their widths are evaluated through decays to final state Λc+K−, which
are explored by means of the full QCD light-cone sum rule method necessary to determine strong couplings of vertices Ξc0′Λc+K− and Ξc∗0Λc+K−.Obtained predictions for the masses and widths of the four excited baryons, as well as previous results for 1P and 2S flavor-antitriplet spin-1/2 baryons Ξc0 are confronted with available experimental data on Ξc0 resonances to fix their quantum numbers. Our comparison demonstrates that the resonances Ξc(2923)0 and Ξc(2939)0 can be considered as orbitally excited spin-1/2 flavor-sextet and spin-3/2 baryons, respectively. The resonance Ξc(2965)0 may be interpreted as radial excitation of either spin-1/2 flavor-sextet or antitriplet baryon.
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