Nature of excited $\mathrm{\Xi }$ baryons with threshold effects

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