A Search for Anomalous Production of Events with three or more leptons using $9.2\,\text{fb

A model-independent search for physics beyond the standard model in events with at least three leptons is presented. The data sample corresponds to $9.2\,\text{fb}^{\text{$-$1}}$ of integrated luminosity in pp collisions at $\sqrt{s}=8$ TeV collected by the CMS experiment at the LHC. Data is binned in exclusive channels. Standard model backgrounds are suppressed by requiring sufficient missing transverse energy, invariant mass inconsistent with that of the Z boson, b-jets, absence of taus, or high jet activity. Control samples in data are used to check the robustness of background evaluation techniques and to minimize the reliance on simulation. The observations are consistent with expectations from standard model processes. These results are used to exclude previously unexplored regions of the supersymmetric parameter space for two representative benchmark scenarios: slepton co-NLSP and a third-generation scenario involving gluino-mediated stop production.