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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 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 w...

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Detalles Bibliográficos
Autores principales: Ellis, John R., Lopez, Jorge L., Nanopoulos, Dimitri V.
Lenguaje:eng
Publicado: 1996
Materias:
Acceso en línea:https://dx.doi.org/10.1016/S0370-2693(97)00019-1
http://cds.cern.ch/record/313549
Descripción
Sumario: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.