We study effects associated with the chiral anomaly for a cascading SU(N+M)×SU(N) gauge theory using gauge/gravity duality. In the gravity dual the anomaly is a classical feature of the supergravity solution, and the breaking of the $U(1) R$ symmetry down to Z2M proceeds via the Higgs mechanism.
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Klebanov et al. (2002) studied this question.
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