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arXiv · hep-ph/9610470

Analysis of LEP Constraints on Supersymmetric Models with a Light Gravitino

J. Ellis·J. Lopez·D. Nanopoulos
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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 M_2. The preliminary LEP 2W constraints in the (mu, M_2) 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 + E_T,miss event can now excluded by the preliminary LEP 2W data.

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J. Ellis, J. Lopez, D. Nanopoulos. 1996-10-24. Analysis of LEP Constraints on Supersymmetric Models with a Light Gravitino. https://doi.org/10.1016/s0370-2693(97)00019-1

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