Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1996-10-24
Phys.Lett.B394:354-358,1997
Physics
High Energy Physics
High Energy Physics - Phenomenology
9 pages, LaTeX, 3 figures (included)
Scientific paper
10.1016/S0370-2693(97)00019-1
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.
Ellis John
Lopez Javier
Nanopoulos Dimitri
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