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Abstract
The nature of nucleon resonances is still being debated, while much experimental data are accumulated. In this work, we focus on the negative parity resonance ${N}^{*}(1895)$ which is located in the scattering region of various meson-baryon coupled channels, and such dynamics can be crucial in understanding its properties. To test the relevance of such hadron dynamics, we investigate the decay properties of ${N}^{*}(1895)$ in detail. We examine how a two pole nature of ${N}^{*}(1895)$ is compatible with its observed decay properties. Moreover, we find that the resonance decays into final states involving $\mathrm{\ensuremath{\Lambda}}(1405)$ and $\mathrm{\ensuremath{\Sigma}}(1400)$, where the latter is not yet observed experimentally. Such decay processes can be useful to study the properties of the aforementioned hyperon resonances.
Highlights
The objective of the present work is to obtain the partial decay widths of NÃð1895Þ to light hyperon resonances, which can be useful in unraveling its nature
We focus on the negative parity resonance NÃð1895Þ which is located in the scattering region of various meson-baryon coupled channels, and such dynamics can be crucial in understanding its properties
To test the relevance of such hadron dynamics, we investigate the decay properties of NÃð1895Þ in detail
Summary
The objective of the present work is to obtain the partial decay widths of NÃð1895Þ to light hyperon resonances, which can be useful in unraveling its nature. The state NÃð1895Þ is special as it is the highest mass nucleon known with Jπ 1⁄4 1=2− and the particle data group (PDG) [1] lists all 1=2− structures found above 1800 MeV together, under the label of NÃð1895Þ Due to this latter fact, it is unclear if one or more states correspond to NÃð1895Þ. The pseudoscalar/vector meson-baryon coupled channel amplitudes obtained in this former work reproduce, for example, the isospin 1=2 and 3=2 πN amplitudes extracted from partial wave analysis [3] of the experimental data and the π−p → ηn and π−p → K0Λ cross sections up to a total energy of about 2 GeV.
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