Inflation in a refined racetrack
Wen-Yu Wen

TL;DR
This paper refines the racetrack inflation model by incorporating an open string modulus, which dynamically interacts with the inflaton, enabling the construction of a realistic inflationary scenario despite complex potential dynamics.
Contribution
It introduces the open string modulus into the racetrack inflation model and demonstrates how to achieve a realistic inflationary setup with appropriate initial conditions.
Findings
Open string modulus dynamically interacts with the inflaton.
A realistic inflation model can be constructed despite complex potential changes.
The model accounts for the embedding of braneworlds in Calabi-Yau throats.
Abstract
In this note, we refine the racetrack inflation model constructed in arXiv:hep-th/0406230 by including the open string modulus. This modulus encodes the embedding of our braneworld inside some Calabi-Yau throat. We argue that in generic this open string modulus dynamically runs with the inflaton field thanks to its nonlinear coupling. A full analysis becomes difficult because the scalar potential changes progressively during the inflation epoch. Nevertheless, by explicit construction we are still able to build a realistic model through appropriate choices of the initial conditions.
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Taxonomy
TopicsBlack Holes and Theoretical Physics · Cosmology and Gravitation Theories · Galaxies: Formation, Evolution, Phenomena
