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arXiv · 2208.03061

The reaction $πN \to ωN$ in a dynamical coupled-channel approach

Yu-Fei Wang·Deborah Rönchen·Ulf-G. Meißner·Yu Lu·Chao-Wei Shen·Jia-Jun Wu
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Abstract

A refined investigation on light flavor meson-baryon scatterings is performed using a dynamical coupled-channel approach, the Jülich-Bonn model, that respects unitartiy and analyticity constraints. The channel space of $πN$, $πΔ$, $σN$, $ρN$, $ηN$, $K Λ$ and $K Σ$ is extended by adding the $ωN$ final state. The spectra of $N^*$ and $Δ$ resonances are extracted in terms of complex poles of the scattering amplitudes, based on the result of a global fit to a worldwide collection of data, in the energy region from the $πN$ threshold to center-of-mass energy $z=2.3$ GeV. A negative value of the $ωN$ elastic spin-averaged scattering length is extracted, questioning the existence of bound states of the $ω$ meson in the nuclear matter.

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Yu-Fei Wang, Deborah Rönchen, Ulf-G. Meißner, Yu Lu, Chao-Wei Shen, Jia-Jun Wu. 2022-10-21. The reaction $πN \to ωN$ in a dynamical coupled-channel approach. https://doi.org/10.1103/physrevd.106.094031

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