EPJ Web Conf.
Volume 271, 2022HYP2022 - 14th International Conference on Hypernuclear and Strange Particle Physics
|Number of page(s)
|Excited Baryons and Hadrons with Heavy Quarks
|09 November 2022
Nature of excited 𝚵 baryons with threshold effects
Department of Physics, Tokyo Metropolitan University, Hachioji 192-0397, Japan
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
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