Speaker
Description
This talk presents a comprehensive study of exotic hadron properties, focusing on the mass spectra and internal structures of pentaquark states within the light and charmonium energy sectors. Utilizing the non-perturbative functional framework of Dyson-Schwinger and Bethe-Salpeter equations (DSEs and BSEs), we employ a fully realized five-quark formulation to analyze states with spin J=1/2,3/2,5/2.
Our methodology systematically evaluates heavy-light and light-quark pentaquarks by modeling internal meson-baryon and diquark-triquark configurations. By isolating the contributions of attractive and repulsive interactions, we demonstrate that the inclusion of repulsive dynamics is essential for achieving quantitative agreement with experimental observations, specifically regarding the Pc and Pcs states and the Λ(1405) baryon. Furthermore, our structural analysis reveals that the heavy-antiquark pentaquarks observed at LHCb are predominantly characterized by their lightest heavy-light meson-baryon configurations. These results provide significant insight into the nature of exotic resonance formation and the underlying dynamics of QCD.