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Non-supersymmetric type I strings with zero vacuum energy. (English) Zbl 0955.81051

Summary: We study open descendants of non-supersymmetric type IIB asymmetric (freely acting) orbifolds with zero cosmological constant. A generic feature of these models is that supersymmetry remains unbroken on the brane at all mass levels, while it is broken in the bulk in a way that preserves Fermi-Bose degeneracy in both the massless and massive (closed string) spectrum. This property remains valid in the heterotic dual of the type II model but only for the massless excitations. A possible application of these constructions concerns scenarios of low-energy supersymmetry breaking with large dimensions.

MSC:

81T30 String and superstring theories; other extended objects (e.g., branes) in quantum field theory
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