2024/01/02 by Yu-Fei Wang, Wang, Yu-Fei
Physics and Astronomy · #Black Holes and Theoretical Physics #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Nuclear Theory (nucl-th) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.2401.01191
openalex publication_date 2024/01/02 · openalex created_date 2024/01/04 · openalex updated_date 2026/07/31
This talk focuses on a recent work aiming at determining the composition of certain N^* and Δ resonances, i.e. whether they are compact states formed directly by quarks and gluons, or composite generated from the meson-baryon interaction. The information of the resonance poles is provided by a comprehensive coupled-channel approach, the Jülich-Bonn model. Thirteen states that are significant in this approach are studied. Two criteria for each state are adopted in this paper, the comparison thereof roughly indicates the model uncertainties. It is found that the conclusions for eight resonances are relatively certain: N(1535) (1)/(2)-, N(1440) (1)/(2)+, N(1710) (1)/(2)+, and N(1520) (3)/(2)- tend to be composite; whereas N(1650) (1)/(2)-, N(1900) (3)/(2)+, N(1680) (5)/(2)+, and Δ(1600) (3)/(2)+ tend to be compact.