Non-Renormalization Theorems in Non-Renormalizable Theories

TL;DR

This paper proves a perturbative non-renormalization theorem for supersymmetric theories, including non-renormalizable ones, showing that certain functions and parameters are unrenormalized beyond one loop, preserving supersymmetry under specific conditions.

Contribution

It establishes a general non-renormalization theorem applicable to both renormalizable and non-renormalizable supersymmetric theories, extending previous results.

Findings

Fayet-Iliopoulos terms are only renormalized at one loop

The gauge coupling parameter is only renormalized at one loop

Supersymmetry remains unbroken if the superpotential has a stationary point

Abstract

A perturbative non-renormalization theorem is presented that applies to general supersymmetric theories, including non-renormalizable theories in which the $\int d^2\theta$ integrand is an arbitrary gauge-invariant function $F(\Phi,W)$ of the chiral superfields $\Phi$ and gauge field-strength superfields $W$, and the $\int d^4\theta$-integrand is restricted only by gauge invariance. In the Wilsonian Lagrangian, $F(\Phi,W)$ is unrenormalized except for the one-loop renormalization of the gauge coupling parameter, and Fayet-Iliopoulos terms can be renormalized only by one-loop graphs, which cancel if the sum of the U(1) charges of the chiral superfields vanishes. One consequence of this theorem is that in non-renormalizable as well as renormalizable theories, in the absence of Fayet-Iliopoulos terms supersymmetry will be unbroken to all orders if the bare superpotential has a stationary point.