Study of the 3He–η system in d– p collisions

We have measured excitation functions for the dp → 3HeX, (X=π0,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.