Understanding the low-lying Ω_c structures from a coupled-channel perspective

2025/07/09 by Zhang, Ying, Song, Qing-Fu, Lü, Qi-Fang +2 · 1 citation
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2507.06611

Abstract

We perform a systematic analysis of the low-lying Ω_c structures in a coupled-channel approach. The couplings between meson-baryon channels, Ξ_c K, Ξ_c^′ K, Ξ_c^* K, Ω_cη and Ω_c^*η, and three-quark bare states Ω_c(1P_λ) are considered. We predict a bound state Ω_c(2954) below the Ξ_c K threshold with (J^P,j)=(1/2^-,0), which can be studied in the final states of Ω_c^(*) π and Ω_c^(*) γ. Also, the resonances Ω_c(3000) and Ω_c(3050) can be classified as the lower (J^P,j)=(1/2^-,1) and (J^P,j)=(3/2^-,1) states, respectively. Our present assignments based on this coupled-channel perspective are significantly different from those of traditional three-quark picture and of molecular scenario. The future BelleII and LHCb experiments can search for the bound state Ω_c(2954) and measure the spin-parities of particles Ω_c(3000) and Ω_c(3050) to test our predictions.

Citations

• Strong decay widths of S- and P-wave singly-, doubly- and triply-heavy charm and bottom baryons
• Strong decays of P-wave doubly charmed and bottom baryons
• Bottom-charmed baryons in a nonrelativistic quark model
• Strong decays of multi-strangeness baryon resonances in the quark model
• Ω baryon spectrum and their decays in a constituent quark model
• Heavy hadronic molecules with pion exchange and quark core couplings: a guide for practitioners
• Baryons in the Constituent-Quark Model

Cited by

• A short review on QCD sum rule studies of P-wave single heavy baryons

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