Minimal String Unification and Hidden Sector in Z8 Orbifold Models
T. Kobayashi
Abstract
We study the minimal supersymmetric standard model derived from the Z8 orbifold models and its hidden sectors. We use a target-space duality anomaly cancellation so as to investigate hidden sectors consistent with the MSSM unification. For the allowed hidden sectors, we estimate the running gauge coupling constants making use of threshold corrections due to the higher massive modes. The calculation is important from the viewpoint of gaugino condensations, which is one of the most promissing mechanism to break the supersymmetry.
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