Summary of the COSY‐11 Measurements of Hyperon Production

The studies of hyperon production performed at COSY‐11 are summarized. The results of the experiments in the reaction channels $pp→pK+Λ,$ $pp→pK+Σ0,$ and $pp→nK+Σ+$ are shown. Excitation functions from threshold up to about 90 MeV excess energies have been evaluated with high precision for the Λ and $Σ0$ production. The $Λp$ and $Σ0p$ final state interactions were extracted. The $Σ+$ production was measured at 13 and 60 MeV excess energies.