The energy dependence of the pp -> K(+)n Sigma(+) reaction

The energy dependence of the total cross section for the pp -> K(+)n Sigma(+) reaction has been investigated at the magnetic spectrometer COSY-ANKE. Signals from the production of the Sigma(+) hyperon were searched for in three simultaneously measured spectra. The values obtained for the total production cross section sigma(Sigma(+)) are slightly below those of sigma(Sigma(0)) at the same excess energies. They follow a phase space dependence and do not show any evidence for strong threshold effects or a significant n Sigma(+) final state interaction.