A Remark on Brane Stabilization in Brane World

In this note we discuss dynamical mechanisms for brane stabilization in the brane world context. In particular, we consider supersymmetry preserving brane stabilization, and also brane stabilization accompanied by supersymmetry breaking. These mechanisms are realized in some four dimensional N = 1 supersymmetric orientifold models. For illustrative purposes we consider two explicit orientifold models previously constructed in [1]. In both of these models branes are stabilized at a finite distance from the orientifold planes. In the first model brane stabilization occurs via supersymmetry preserving non-perturbative gauge dynamics. In the second model supersymmetry is dynamically broken, and brane stabilization is due to an interplay between non-perturbatively generated superpotential and tree-level Kähler potential. Typeset using REVTEX E-mail: [email protected]. Address after September 1, 1999: Institute for Theoretical Physics, State University of New York, Stony Brook, NY 11794.