= Non-renormalization theorem
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= Superpotential non-renormalization
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The local <Wilsonian effective action> <superpotential> receives no perturbative corrections when <supersymmetry> is preserved, an infrared cutoff is retained and the same elementary fields are kept. The <spurion selection rule for perturbative non-renormalization> gives a holomorphy proof. The <Kähler potential> and physical couplings after <wave-function renormalization> can change; genuine nonperturbative superpotential terms require a separate analysis.
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