Inflation in a refined racetrack

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Wen, Wen-Yu
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Abstract
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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.
Comment: 10 pages, 6 figures
Keywords
High Energy Physics - Theory, Astrophysics, High Energy Physics - Phenomenology
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