SPRING 2017 SCHEDULE
Sergey Monin (University of Minnesota)Wednesday, 3:30 PM, February 22, Riddick 400P Heterotic Non-Abelian String of a Finite Length We consider non-Abelian strings in N=2 supersymmetric QCD with the U(N) gauge group and N_f=N quark flavors deformed by a mass term for the adjoint matter. This deformation breaks N=2 supersymmetry down to N=1. Dynamics of orientational zero modes on the string world sheet are described then by CP(N−1) model with N=(0,2) supersymmetry. We study the string of a finite length L assuming compactification on a cylinder (periodic boundary conditions). The world-sheet theory is solved in the large-N approximation. We find a rich phase structure in the (L,u) plane where u is a deformation parameter. We also discuss how this phase structure matches the N=(2,2) limit in which the world-sheet theory has a single phase with the mass gap independent of L. |