Analysis of LEP Constraints on Supersymmetric Models with a Light Gravitino
J. Ellis, J. Lopez, D. Nanopoulos
Abstract
We propose an analysis of LEP constraints on radiative neutralino decays into a light gravitino, based on the plane of the Higgs mixing parameter mu and the SU(2) gaugino mass M2. The preliminary LEP 2W constraints in the (mu, 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 ee gamma gamma + ET,miss event can now excluded by the preliminary LEP 2W data.
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