TY  - EJOUR
AU  - Wang, Yu-Fei
AU  - Meißner, Ulf-G.
AU  - Rönchen, Deborah
AU  - Shen, Chao-Wei
TI  - On the nature of the $N^*$ and $\Delta$ resonances via coupled-channel dynamics
IS  - arXiv:2307.06799
M1  - FZJ-2023-05080
M1  - arXiv:2307.06799
PY  - 2023
N1  - 19 pages, 6 figures
AB  - This work aims at determining the composition of certain $N^*$ and $\Delta$ resonances, i.e. whether they are compact states formed directly by quarks and gluons, or hadronic molecules generated from the meson-baryon interaction. The information of the resonance poles is provided by a comprehensive coupled-channel approach, the Jülich-Bonn model. $13$ 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 $8$ resonances are relatively certain: $N(1535) \frac{1}{2}^-$, $N(1440) \frac{1}{2}^+$, $N(1710) \frac{1}{2}^+$, and $N(1520) \frac{3}{2}^-$ tend to be composite; whereas $N(1650) \frac{1}{2}^-$, $N(1900) \frac{3}{2}^+$, $N(1680) \frac{5}{2}^+$, and $\Delta(1600) \frac{3}{2}^+$ tend to be compact.
LB  - PUB:(DE-HGF)25
DO  - DOI:10.34734/FZJ-2023-05080
UR  - https://juser.fz-juelich.de/record/1019017
ER  -