Hyperon I: Partial-wave amplitudes for K-p scattering

M. Matveev; A. V. Sarantsev; V. A. Nikonov; A. V. Anisovich; U. Thoma; E. Klempt

doi:10.1140/epja/i2019-12878-y

EPJ

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2018 Impact factor 2.481

Hadrons and Nuclei

Regular Article - Experimental Physics

Eur. Phys. J. A (2019) 55: 179
https://doi.org/10.1140/epja/i2019-12878-y

Regular Article - Experimental Physics

Hyperon I: Partial-wave amplitudes for K^-p scattering

M. Matveev¹^,2, A. V. Sarantsev¹^,2, V. A. Nikonov¹^,2, A. V. Anisovich¹^,2, U. Thoma¹ and E. Klempt¹^*

¹ Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, 53115, Bonn, Germany
² National Research Centre “Kurchatov Institute”, Petersburg Nuclear Physics Institute, 188300, Gatchina, Russia

^* e-mail: klempt@hiskp.uni-bonn.de

Received: 8 July 2019
Accepted: 9 September 2019
Published online: 17 October 2019

Abstract

Early data on induced reactions off protons are collected and used in a coupled-channel partial-wave analysis (PWA). Data that had been published in the form of Legendre coefficients are included in the PWA. In a primary fit using and resonances only, we observe some significant discrepancies with the data. In a systematic search for new and hyperon resonances, additional candidates are found. The significance of the known and of the additional resonances is evaluated. Seventeen resonances listed with or and one resonance listed with in the Review of Particle Physics cannot be confirmed, five new hyperons are suggested. The partial-wave amplitudes deduced in this analysis are compared to those from other analyses.