A chiral SU(N) gauge theory and its non-chiral Spin(8) dual

We study supersymmetric SU(N - 4) gauge theories with a symmetric tensor and N antifundamental representations. The theory with W = 0 has a dual description in terms of a non-chiral Spin(8) theory with one spinor and N vectors. This duality flows to the SO(N) duality of Seiberg and to a duality proposed by one of us. It also flows to dualities for a number of Spin(m) theories, m ≤ 8. For N = 6, when an N = 2 SUSY superpotential is added, the singularities of Seiberg and Witten are recovered. For N ≤ 6, a mass for the spinor generates the branches of SO(8) theories found by Intriligator and Seiberg. Other phenomena include a classical constraint mapped to an anomaly equation under duality and an intricate consistency check on the renormalization group flow.