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 $<~6.$ 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-{β} decay, and flavor-changing neutral currents are analyzed as illustrations of the method.