2025/06/30 by Samson Clymton, Clymton, Samson, Hyun-Chul Kim +3 · 3 citations
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #Quantum Chromodynamics and Particle Interactions #Quantum and Classical Electrodynamics
paper · pdf · doi:10.48550/arxiv.2506.23587
openalex publication_date 2025/06/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We investigate the possible existence of double-strangeness hidden-charm pentaquark states, denoted as P_ccss, within an off-shell coupled-channel formalism. Eleven meson-baryon channels with total strangeness S = -2 are constructed by combining charmed mesons and singly charmed baryons. The two-body scattering amplitudes are derived from an effective Lagrangian that respects heavy-quark spin symmetry, hidden local symmetry, and flavor SU(3) symmetry. The Bethe-Salpeter equation is solved using the Blankenbecler-Sugar reduction scheme, and resonances are identified as poles in the scattering amplitudes on the complex energy plane. We find five negative-parity P_ccss states with spins J = 1/2, 3/2, and 5/2, all located below their relevant thresholds. Three positive-parity states are also found: two with J = 1/2 and one with J = 3/2, lying above the thresholds with substantial widths. The coupling strengths of each resonance to relevant meson-baryon channels are extracted. The sensitivity of the results to the cutoff parameter Λ0 = Λ- m is examined. These results provide theoretical predictions that may assist future experimental searches for P_ccss states in the J/ψ Ξ channel.