Analysis of LEP constraints on supersymmetric models with a light gravitino

We propose an analysis of LEP constraints on radiative neutralino decays into a light gravitino, based on the plane of the Higgs mixing parameter μ and the SU(2) gaugino mass M2. The preliminary LEP 2W constraints in the (μ, M2) plane are considerably stronger than for supersymmetric models in which the lightest neutralino is stable. A significant portion of the parameter space in which chargino or selectron decay into a final state containing a light gravitino could provide an interpretation of the CDF e+e−γγ + ET,miss event can now excluded by the preliminary LEP 2W data.