Non-Abelian strings in N=1 supersymmetric QCD
We consider a deformation of the N=2 supersymmetric QCD with the U(N_c) gauge group and N_f = N_c quark flavors with a mass term of the adjoint matter. In the limit of large deformation the theory flows to an N = 1 supersymmetric QCD. We study the solution for the non-Abelian string in this limit and derive an effective theory on the string world sheet which turns out to be a bosonic CP(N_c-1) model with a world sheet potential. We discuss what happens to confined monopoles of the original theory. We also discuss what becomes of semilocal string of the N_f > N_c theory.