Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1997-05-05
Nucl.Phys.B506:223-235,1997
Physics
High Energy Physics
High Energy Physics - Theory
harvmac, 14 pages, added references
Scientific paper
10.1016/S0550-3213(97)00450-1
We discuss consistency conditions for branes at orbifold singularities. The conditions have a world-sheet interpretation in terms of tadpole cancellation and a space-time interpretation in terms of anomalies. As examples, we consider type II and type I branes on $C^2/Z_M$ orbifolds. We give orientifold constructions of phases of type I or heterotic string theory, involving branches with extra tensor multiplets, which arise when small SO(32) instantons sit on orbifold singularities.
Blum Julie D.
Intriligator Kenneth
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