Study of the 3He η system in d p collisions

We have measured excitation functions for the dp → ³HeX, (X=π,η) channels near the η production threshold. The data were taken during a slow ramping of the COSY internal deuteron beam scattered on a proton target. The excitation function for the reaction dp → ³He π⁰ does not show any structure which could originate from the decay of ³He η bound state. We measured also the threshold excitation curve for the dp → ³HeX process, however, contrary to the SATURNE results, we observe no cusp near the η threshold.