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We consider effective actions for six-dimensional noncritical superstrings. We show that the addition of N units of RR flux and of Nf space–time filling D5-branes produces AdS 5×S1 solutions with curvature comparable to the string scale. These solutions have the right structure to be dual to [Formula: see text] supersymmetric SU (N) gauge theories with Nf flavors. We further suggest bounds on the mass-squared of tachyonic fields in this background that should restrict the theory to the conformal window.
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Klebanov et al. (2004) studied this question.
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