https://doi.org/10.1140/epja/i2017-12443-x
Regular Article - Experimental Physics
N* resonances from K
amplitudes in sliced bins in energy
1
Helmholtz-Institute für Strahlen- und Kernphysik der Universität Bonn, Nussallee 14 - 16, 53115, Bonn, Germany
2
Particle and Nuclear Physics Institute, Orlova Rosha 1, 188300, Gatchina, Russia
3
Thomas Jefferson Laboratory, 12000 Jefferson Avenue, 23606, Newport News, VA, USA
4
Rudjer Boskovic Institute, Bijenicka cesta 54, P.O. Box 180, 10002, Zagreb, Croatia
5
SUPA, School of Physics and Astronomy, University of Glasgow, G12 8QQ, Glasgow, UK
6
University of Tuzla, Faculty of Natural Sciences and Mathematics, Univerzitetska 4, 75000, Tuzla, Bosnia and Herzegovina
* e-mail: klempt@hiskp.uni-bonn.de
Received:
26
June
2017
Accepted:
6
December
2017
Published online:
22
December
2017
The two reactions 
and 
are analyzed to determine the leading photoproduction multipoles and the pion-induced partial wave amplitudes in slices of the invariant mass. The multipoles and the partial-wave amplitudes are simultaneously fitted in a multichannel Laurent+Pietarinen model (L+P model), which determines the poles in the complex energy plane on the second Riemann sheet close to the physical axes. The results from the L+P fit are compared with the results of an energy-dependent fit based on the Bonn-Gatchina (BnGa) approach. The study confirms the existence of several poles due to nucleon resonances in the region at about 1.9 GeV with quantum numbers 
.
© SIF, Springer-Verlag GmbH Germany, part of Springer Nature, 2017
