https://doi.org/10.1140/epjc/s10052-020-7824-y
Letter
Excited 
baryons and fine structure of strong interaction
1
School of Physics, Southeast University, Nanjing, 210094, China
2
School of Physics, Beihang University, Beijing, 100191, China
3
College of Science, Northwest A&F University, Yangling, 712100, China
4
Research Center for Nuclear Physics (RCNP), Osaka University, Ibaraki, 567-0047, Japan
5
Advanced Science Research Center, Japan Atomic Energy Agency (JAEA), Tokai, 319-1195, Japan
6
Department of Electrical and Electronic Engineering, Suzhou University, Suzhou, 234000, China
* e-mail: hxchen@buaa.edu.cn
Received:
8
February
2020
Accepted:
10
March
2020
Published online:
19
March
2020
The heavy baryon system bounded by the strong interaction has a rich internal structure, so its mass spectra can have the fine structure similar to the line spectra of atom bounded by the electromagnetic interaction. We systematically study the internal structure of P-wave baryons and calculate their D-wave decay properties. The present study, together with our previous studies on their mass spectra and S-wave decay properties, suggest that all the four excited baryons recently discovered by LHCb can be well explained as P-wave baryons, and their beautiful fine structure is directly related to the rich internal structure of P-wave baryons.
© The Author(s), 2020
