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arXiv · 2208.14608

Nature of excited $\Xi$ baryons with threshold effects

Takuma Nishibuchi·Tetsuo Hyodo
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Abstract

Spectroscopy of excited baryons with strangeness $S=-2$ is stimulated by recent experimental developments. Here we focus on the $\Xi(1620)$ which locates close to the $\bar{K}\Lambda$ threshold. To take into account the threshold effects, we construct the coupled-channels meson-baryon scattering amplitude where the $\Xi(1620)$ appears as a resonance. We demonstrate that the $\bar{K}\Lambda$ threshold effects distort the peak of the $\Xi(1620)$ resonance from the simple Breit-Wigner distribution.

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Takuma Nishibuchi, Tetsuo Hyodo. 2022-08-31. Nature of excited $\Xi$ baryons with threshold effects. https://doi.org/10.1051/epjconf%2F202227110002

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