A type IIA T^6/(Z2xZ2) orientifold with KL stabilization is claimed to address strong CP, hierarchy, and cosmological constant fine-tuning, but the concrete vacuum analysis only produces a Minkowski vacuum with u=0.
Dvali, Phys
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Fine-tuning problems in type IIA string theory
A type IIA T^6/(Z2xZ2) orientifold with KL stabilization is claimed to address strong CP, hierarchy, and cosmological constant fine-tuning, but the concrete vacuum analysis only produces a Minkowski vacuum with u=0.