Experimental Search for Chargino and Neutralino Production in Supersymmetry Models with a Light Gravitino

We search for inclusive high ET diphoton events with large missing transverse energy in pp̄ collisions at √s0ex0ex=0ex0ex1.80ex0exTeV. Such events are expected from pair production of charginos and neutralinos within the framework of the minimal supersymmetric standard model with a light gravitino. No excess of events is observed. In that model, and assuming gaugino mass unification at the GUT scale, we obtain a 95% C.L. exclusion region in the supersymmetry parameter space and lower mass bounds of 150GeV/c² for the lightest chargino and 77GeV/c² for the lightest neutralino.