An orbifold of Type 0B strings and non-supersymmetric gauge theories Original Research Article

We study a Z2 orbifold of Type 0B string theory by reflection of six of the coordinates (this theory may also be thought of as a Z4 orbifold of Type IIB by a rotation by π in three independent planes). We show that the only massless mode localized on the fixed fourplane R3,1 is a U(1) gauge field. After introducing D3-branes parallel to the fixed fourplane we find non-supersymmetric non-abelian gauge theories on their worldvolume. One of our results is that the theory on equal numbers of electric and magnetic D3-branes placed at the fourplane is the Z4 orbifold of N=4 supersymmetric Yang–Mills theory by the center of its R-symmetry group.