U(N) Gauge Model and Partial Breaking of N=2 Supersymmetry
  We briefly review a construction of N=2 supersymmetric U(N) gauge model in which rigid N=2 supersymmetry is spontaneously broken to N=1. This model generalizes the abelian model considered by Antoniadis, Patouche and Taylor. We discuss the conditions on the vacua of the model with partial supersymmetry breaking. 
Kazuhito Fujiwara, Hiroshi Itoyama and Makoto Sakaguchi