The energy dependence of the total cross section for the pp → K++ reaction has been investigated at the magnetic spectrometer COSY‐ANKE. Signals from the production of the Σ+ hyperon were searched for in three simultaneously measured spectra. The values obtained for the total production cross section σ(Σ+) are slightly below those of σ(Σ0) at the same excess energies. They follow a phase space dependence and do not show any evidence for strong threshold effects or a significant + final state interaction.

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