SUSY/non-SUSY duality in U(N) gauge model with partially broken N=2 supersymmetry

We study the vacuum structure of the U(N) gauge model with partially broken N = 2 supersymmetry. From the analysis of the classical vacua of this model, we point out that in addition to the ordinary N = 1 supersymmetric vacua. there are vacua with negative gauge coupling constants, which preserve another N = 1 supersymmetry. These latter vacua can be analyzed by using SUSY/non-SUSY duality which is recently proposed by Aganagic, Beem, Seo and Vafa. A dual description of these in UV is U(N) gauge theory where the supersymmetry is broken by spurion superfields. Following them, we see that there are supersymmetry preserving vacua as well as supersymmetry breaking vacua of low energy effective theory. (C) 2008 Elsevier B.V. All rights reserved.