Effective operators in Supersymmetry

We consider a low-energy supersymmetric scenario in which the effects of heavy supersymmetric interactions are included in a model-independent manner through a series of supersymmetric SU(3)_C*SU(2)_L*U(1)_Y invariant operators; we explicitly construct all such operators of dimension less or equal than 6. From this set, those operators generated at tree level by the underlying theory are isolated since under weak coupling conditions they are expected to provide the largest effects in low-energy processes. Potential deviations from low energy predictions in process such as proton decay, neutrinoless double-beta decay and flavor changing neutral currents are analyzed as illustrations of the method.