Anomaly-free nonsupersymmetric large N gauge theories from orientifolds - art. no. 045007

We construct anomaly-free nonsupersymmetric large N gauge theories from ori entifolds of type IIB on C-3/T orbifolds. In particular, massless as well a s tachyonic one-loop tadpoles are canceled in these models. This is achieve d by starting with N = 1, 2 supersymmetric orientifolds with a well defined world-sheet description and including discrete torsion (which breaks super symmetry) in the orbifoid action. In this way we obtain nontrivial nonchira l as well as anomaly-free chiral large N gauge theories. We point out certa in subtleties arising in the chiral cases. Subject to certain assumptions, these theories are shown to have the property that computation of any M-poi nt correlation function in these theories reduces to the corresponding comp utation ia the parent N = 4 oriented theory. This generalizes the analogous results recently obtained in supersymmetric large N gauge theories from or ientifolds, as well as in (non)supersymmetric large N gauge theories withou t orientifold planes. [S0556-2821(99)03804-7].