Inflationary α-attractor from type-IIB/F theory

Le résumé fourni par la source

Abstract We derive an potential of slow-roll inflation in the warped D brane set-up featuring three intersecting D 7 branes under type of CY 3 -compactification within type-IIB/F theory with some near-conifold regions. The underlying quadratic structure of the kinetic poles is found to arise from a correction in the Kähler potential when an extra contribution of open string moduli is turned on. While the closed string sector of the moduli spectrum is completely stabilized via quantum corrections of perturbative and non-perturbative origin, the open string sector plays the lead role in driving the inflationary expansion in the radial direction. A generic asymptotic behaviour of the inflaton field near the pole boundaries manifests itself as the slow-roll plateau in canonical field space, which becomes responsible for giving universal predictions of the cosmological parameters. We find that the presence of the open strings near conifold regions brings the realization of pole inflation in the present set-up. Finally we compare our results with similar models and discuss the importance of exploring precise values of α in the light of ongoing and forthcoming cosmological surveys.

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