Moduli stability in type I string orbifold models
Abstract
We analyze the stability of the moduli at the quantum level in an open-string model realizing the N=2 N=0 spontaneous breaking of supersymmetry in four-dimensional Minkowski spacetime. In the region of moduli space where the supersymmetry breaking scale is lower than the other scales, we identify vanishing minima of the one-loop effective potential, up to exponentially small corrections. In these backgrounds, the spectrum satisfies Bose-Fermi degeneracy at the massless level.
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