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In this paper we consider gauged N=2 supergravities which arise in thelow-energy limit of type II string theories and study examples which exhibitspontaneous partial supersymmetry breaking. For the quantum STU model we derivethe scalar field space and the scalar potential of the N=1 supersymmetriclow-energy effective action. We also study the properties of the MinkowskianN=1 supersymmetricground states for a broader class of supergravities includingthe quantum STU model.

Examples of N=2 to N=1 supersymmetry breaking