https://doi.org/10.1140/epja/s10050-020-00142-8
Regular Article - Experimental Physics
Hyperon III: 
coupled-channel dynamics in the 
mass region
1
Helmholtz–Institut für Strahlen–und Kernphysik, Universität Bonn, 53115, Bonn, Germany
2
National Research Centre “Kurchatov Institute”, Petersburg Nuclear Physics Institute, Gatchina, 188300, Russia
3
Thomas Jefferson National Accelerator Facility, Newport News, VA, 23606, USA
4
Carnegie Mellon University, Pittsburgh, PA, 15213, USA
* e-mail: klempt@hiskp.uni-bonn.de
Received:
2
November
2019
Accepted:
6
April
2020
Published online:
19
May
2020
Low-energy data on the three charge states in 
from CLAS at JLab, on 
and 
from the Crystal Ball at BNL, bubble chamber data on 
, low-energy total cross sections on 
induced reactions, and data on the 
atom are fitted with the BnGa partial-wave-analysis program. We find that the data can be fitted well with just one isoscalar spin-1/2 negative-parity pole, the , and background contributions. In a fit with one isocsalar state, the structure can be determined as a dominantly SU(3) singlet state. A fit with two isoscalar singlet states, with imposed properties of the low-mass state, is, however, also not incompatible with data.
© The Author(s), 2020
