|
Erich Poppitz University of Toronto Recent ideas in physics beyond the standard model involve the possibility that gauge and matter fields propagate in extra dimensions of size smaller than an inverse TeV. It is important to fully understand the implications of such models, including the role of nonperturbative effects. We study the contributions of instantons in toy supersymmetric 5D models from several different perspectives: `exact' results based on symmetries, explicit instanton calculations, and deconstructed extra dimensions. We show that the Seiberg-Witten curves of the compactified 5D theory obtained in the various approaches agree. We conclude with some speculations and preliminary results on nonperturbative effects in realistic models.
Tuesday, November 5th 2001, 13:10 |