We construct a simple local model of dynamical supersymmetry breaking. The model is a one-generation $SU(5)$ that arises from a IIB ${\mathbb{Z}}_N$ orientifold. It does not admit a runaway direction and is argued to stabilize the blowup mode related to the corresponding $U(1)$ factor. The theory demonstrates the existence of a new class of “blowup” fractional branes

• Received 10 April 2007

DOI:https://doi.org/10.1103/PhysRevD.77.026001