Analysis of Xi(1620) resonance with chiral unitary approach

The excited states of Xi(1620) has not been theoretically analyzed for a long time. However, more detailed experimental results have recently been obtained, starting with spectra obtained by the Belle experiment in 2019. In 2021, the ALICE experiment determined the Kbar lambda scattering length with femtoscopy in lead-lead collisions.

In this talk, we construct a coupled-channel meson-baryon scattering amplitude which reproduces the Kbar Lambda scattering length from ALICE experiment using the chiral unitary method, and discuss nature of the Xi(1620) that exists near the KbarLambda threshold[1].

[1]T.Nisihibuchi and T.Hyodo, arXiv:2305.10753 [hep-ph]