2025/04/10 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) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions
paper · doi:10.48550/arxiv.2504.07693
openalex publication_date 2025/04/10 · openalex created_date 2025/10/09 · openalex updated_date 2026/07/28
We investigate the hidden-charm pentaquark states with strangeness S=-1 (P_ccs) within an off-shell coupled-channel approach based on effective Lagrangians that respect heavy-quark spin symmetry, SU(3) flavor symmetry, and hidden local symmetry. All relevant meson-baryon two-body channels composed of low-lying anti-charmed mesons and singly-charmed baryons with S=-1, as well as the J/ψΛ channel, are included. We find a total of eleven negative-parity states and three positive-parity states. Among the negative-parity states, the P_ccs(4338) and P_ccs(4459) can possibly be interpreted as DΞc and D^* Ξc molecular states, respectively. We identify a second state, P_ccs(4472), located close to the P_ccs(4459) but with different spin and width, which may correspond to the structure observed by the Belle Collaboration. Both states are generated from the D^* Ξc channel and can be interpreted as spin partners. Their properties are consistent with recent experimental observations, providing strong support for the molecular interpretation of the P_ccs states. We also observe a two-pole structure near the Ds^* Λc and DΞc' thresholds, and find virtual and resonance states in the D^* Ξc' channel depending on spin-parity.