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- W596221276 abstract "The slow-roll inflation is a beautiful paradigm, yet the inflaton potential can hardly be sufficiently flat when unknown gravitational effects are taken into account. However, the hybrid inflation models constructed in D = 4 N = 1 supergravity can be consistent with N = 2 supersymmetry, and can be naturally embedded into string theory. This article discusses the gravitational effects carefully in the string model, using D = 4 supergravity description. We adopt the D3--D7 system of Type IIB string theory compactified on K3 x T^2/Z_2 orientifold for definiteness. It turns out that the slow-roll parameter can be sufficiently small despite the non-minimal Kahler potential of the model. The conditions for this to happen are clarified in terms of string vacua. We also find that the geometry obtained by blowing up singularity, which is necessary for the positive vacuum energy, is stabilized by introducing certain 3-form fluxes." @default.
- W596221276 created "2016-06-24" @default.
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- W596221276 date "2009-09-25" @default.
- W596221276 modified "2023-10-17" @default.
- W596221276 title "Supergravity Analysis of Hybrid Inflation Model from D3--D7 System - eScholarship" @default.
- W596221276 hasPublicationYear "2009" @default.
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