Runaway potentials and a massive Goldstino

We study $N=1$ globally supersymmetric theories on runaway backgrounds arising from scalar potentials with a slope characterized by a scale $M=|V/V^{\prime }|$. We find that, under mild assumptions, there always exists a massive Goldstino in the low-energy effective theory. In the simplest models, the effective mass of such a fermion is of order $\sqrt{V}/M$ or of order $V/M^2\mu$ when a seesaw mechanism takes place, where $\mu$ is a scale that characterizes the masses of other heavy fermions.