Anisovich, A.V. et al. (2017) N∗ resonances from KΛ amplitudes in sliced bins in energy. European Physical Journal A, 53(12), 242. (doi: 10.1140/epja/i2017-12443-x)
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Abstract
The two reactions γp→K+Λγp→K+Λ and π−p→K0Λπ−p→K0Λ 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 JP=1/2+,3/2+,1/2−,3/2−,5/2−JP=1/2+,3/2+,1/2−,3/2−,5/2−.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Ireland, Professor David |
| Authors: | Anisovich, A.V., Burkert, V., Hadžimehmedović, M., Ireland, D.G., Klempt, E., Nikonov, V. A., Omerović, R., Sarantsev, A. V., Stahov, J., Švarc, A., and Thoma, U. |
| College/School: | College of Science and Engineering > School of Physics and Astronomy |
| Journal Name: | European Physical Journal A |
| Publisher: | Springer |
| ISSN: | 1434-6001 |
| ISSN (Online): | 1434-601X |
| Published Online: | 22 December 2017 |
| Copyright Holders: | Copyright © 2017 The AuthorsSpringer-Verlag GmbH Germany |
| First Published: | First published in European Physical Journal A 53(12):242 |
| Publisher Policy: | Reproduced in accordance with the copyright policy of the publisher. |
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