https://doi.org/10.1051/epjconf/202227110002
Nature of excited 𝚵 baryons with threshold effects
Department of Physics, Tokyo Metropolitan University, Hachioji 192-0397, Japan
* e-mail: nishibuchi-takuma@ed.tmu.ac.jp
** e-mail: hyodo@tmu.ac.jp
Published online: 9 November 2022
Spectroscopy of excited baryons with strangeness S = −2 is stimulated by recent experimental developments. Here we focus on the Ξ(1620) which locates close to the K̅Λ threshold. To take into account the threshold effects, we construct the coupled-channels meson-baryon scattering amplitude where the Ξ(1620) appears as a resonance. We demonstrate that the K̅Λ threshold effects distort the peak of the Ξ(1620) resonance from the simple Breit-Wigner distribution.
© The Authors, published by EDP Sciences, 2022
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
