  In my diploma thesis I calculate a lower mass bound of the lightest nutralino
assuming an additional supernova cooling mechanism. I consider
elektron-positron annihilation and nucleon-nucleon bremsstrahlung as cooling
processes. These cooling processes must not be too effective because they would
destroy the neutrino signal (SN 1987a). From this requirement I derive an upper
bound for the emitted energy and as a consequence I get a lower bound for the
mass of the lightest neutralino.
