Abstract
A well-known model, due to Zanon, which exhibits dynamical supersymmetry breaking at large N is reexamined. The breaking is known to be pathological because the Goldstone fermion has negative norm. Here the two-loop corrections to the large-N effective potential are computed, and it is seen that the effect of the negative-norm state is to soften ultraviolet divergences beyond what is found in perturbation theory, rendering the model superrenormalizable in the loop expansion.
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