Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2003-11-20
Phys.Rev.D69:106001,2004; Erratum-ibid.D70:129907,2004
Physics
High Energy Physics
High Energy Physics - Theory
21 pages; v3. a typo corrected, and some changes made in sections 4.1 and 4.2, accordingly
Scientific paper
10.1103/PhysRevD.69.106001
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.
Koyama Fumikazu
Tachikawa Yuji
Watari Taizan
No associations
LandOfFree
Supergravity Analysis of Hybrid Inflation Model from D3--D7 System does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Supergravity Analysis of Hybrid Inflation Model from D3--D7 System, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Supergravity Analysis of Hybrid Inflation Model from D3--D7 System will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-112551