Study of the reaction

This contribution describes a recent experimental study of the reaction on light nuclei, , , and . Final π±Σ∓ pairs arise from π+π−n events. For some nuclei, the π+ momentum spectrum presents peak-strucures in the kinematical interval of formation of Σ-hypernuclear states. The apparatus used for the investigation is the FINUDA spectrometer set at DAΦNE.