Conformal invariance of the planar beta-deformed N=4 SYM theory requires beta real

preprint2006arXivOpen access

Abstract

We study the \cal{N}=1 SU(N) SYM theory which is a marginal deformation of the \cal{N}=4 theory, with a complex deformation parameter β. We consider the large N limit and study perturbatively the conformal invariance condition. We find that finiteness requires reality of the deformation parameter β.

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