N∗ resonances from KΛ amplitudes in sliced bins in energy

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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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
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
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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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
653082Glasgow nuclear physics consolidated grantDavid IrelandScience & Technology Facilities Council (STFC)ST/L005719/1S&E P&A - PHYSICS & ASTRONOMY