Experimental Signatures of Low Energy Gauge-Mediated Supersymmetry Breaking

The experimental signatures for low energy gauge-mediated supersymmetry breaking are distinctive since the gravitino is naturally the lightest supersymmetric particle. The next lightest supersymmetric particle (NLSP) can be a gaugino, Higgsino, or right handed slepton. For a significant range of parameters, decay of the NLSP to its partner plus the gravitino can be measured as a displaced vertex or kink in a charged particle track. In the case that the NLSP is mostly gaugino, we identify the discovery modes as $e^{+}{e}^{-}\to \gamma \gamma +E$, and $p\overline{p}\to l^{+}{l}^{-}\gamma \gamma +E{}_T$. If the NLSP is a right-handed slepton, the discovery modes are $e^{+}{e}^{-}\to l^{+}{l}^{-}+E$ and $p\overline{p}\to l^{+}{l}^{-}+E{}_T$. A NLSP which is mostly Higgsino is also considered.