Standard model backgrounds to supersymmetry searches

This work presents a review of the standard model sources of backgrounds to the search of supersymmetry signals. Depending on the specific model, typical signals may include jets, leptons, and missing transverse energy due to the escaping lightest supersymmetric particle. We focus on the simplest case of multijets and missing energy, since this allows us to expose most of the issues common to other more complex cases. The review is not exhaustive, and it is aimed at collecting a series of general comments and observations, to serve as a guideline for the process that will lead to a complete experimental determination of size and features of such SM processes.