Fine-tuning of the binding energies and widths of the quasibound states in three-body systems consisting of antikaon(s) and nucleon(s) was performed. Dynamically exact three-body Faddeev-type Alt-Grassberger-Sandhas equations with three coupled particle channels were solved for the description of the $\overline{K}NN$ and $\overline{K}\overline{K}N$ systems in different spin states. New models of the antikaon-nucleon and pion-nucleon interactions were constructed, and together with my best version of the hyperon-nucleon potential, were used as input. The characteristics of the quasibound $K^{-}pp$ state calculated with my new one-pole $\overline{K}N-\pi \mathrm{\Sigma }-\pi \mathrm{\Lambda }$ potential reproduces the experimental data from the E15 J-PARC experiment.

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• Few-body systems
• Hypernuclei & mesic nuclei