New phenomena in SU(3) supersymmetric gauge theory Original Research Article

We show that four-dimensional N = 2 supersymmetric SU(N) gauge theory for N > 2 necessarily contains vacua with mutually non-local massless dyons, using only analyticity of the effective action and the weak coupling limit of the moduli space of vacua. A specific example is the ℤ3 point in the exact solution for SU(3), and we study its effective Lagrangian. We propose that the low-energy theory at this point is an N = 2 superconformal U(1) gauge theory containing both electrically and magnetically charged massless hypermultiplets.