Formation of $\mathrm{\Sigma }\pi$ pairs in nuclear captures of K${}^{-}$ mesons

The capture of K${}^{-}$ mesons on nucleons bound in nuclei offer a chance to study the $\mathrm{\Sigma }\pi$ pairs below the kinematic threshold of the $\bar{\mathrm{K}}$N systems. Various hyperon-pion charged combination are presently under investigation by AMADEUS. These data allow to test both isospin 0 and 1 amplitudes giving the possibility to detect the structure of resonant $\mathrm{\Lambda }$(1405) state. Contrasted against similar electro-production data, it is possible to detect changes of $\mathrm{\Lambda }$(1405) in nuclear media. Expected spectra and their uncertainties are calculated.