Superpotential ($W(\Phi )$)

A superpotential is a holomorphic function of chiral superfields integrated over chiral superspace, $\int d^2\theta W+h.c.$

For canonical global supersymmetry, eliminating the auxiliary fields gives

The supersymmetric non-renormalization theorem says that the Wilsonian superpotential receives no perturbative corrections. Holomorphy and spurion symmetries can often exclude nonperturbative corrections as well.