Speaker
Description
We investigate the hidden-charm (nnnc\bar{c}) pentaquark sector within the framework of Regge phenomenology, where (n) denotes a light (u) or (d) quark. By analysing the corresponding trajectories in the ((J,M^2)) plane, we determine the allowed ground-state mass ranges and extract the associated Regge parameters. These parameters are then employed to predict the pattern of spin and orbital excitations and their possible (J^P) assignments.
Special attention is given to the interpretation of the resulting states as exotic baryon resonances. We compare the predicted hidden-charm spectrum with the relevant (\eta_c N), (J/\psi N), (\Lambda_c\bar{D}^{()}), and (\Sigma_c^{()}\bar{D}^{(*)}) thresholds. For each state, the lowest partial waves allowed by angular-momentum and parity conservation are identified, providing a qualitative guide to the decay channels expected to be most relevant in experiment.
The predicted spectrum exhibits a systematic Regge ordering with total spin and orbital excitation. Its mass and spin-parity pattern is further examined in relation to the reported hidden-charm (P_c) structures, without assuming a unique assignment. The analysis provides Regge-based constraints on hidden-charm pentaquark baryon spectroscopy and on channels relevant to their future experimental investigation. Related open-charm and anti-charmed pentaquark configurations are discussed as multicharm extensions of the trajectory pattern.