Inflation and Kahler Stabilization of the Dilaton

Details Inflation and Kahler Stabilization of the Dilaton Inflation and Kahler Stabilization of the Dilaton

2003-02-04

arxiv.org/abs/hep-th/0302024v1

Phys.Rev. D67 (2003) 103506

Physics

High Energy Physics

High Energy Physics - Theory

12 pages, submitted to PRD

Scientific paper

10.1103/PhysRevD.67.103506

The problems of attempting inflationary model-building in a theory containing a dilaton are explained. In particular, I study the shape of the dilaton potential today and during inflation, based on a weakly-coupled heterotic string model where corrections to the Kahler potential are assumed to be responsible for dilaton stabilization. Although no specific model-building is attempted, if the inflationary energy density is related to the scale of gaugino condensation, then the dilaton may be stabilized close enough to today's value that there is no significant change in the GUT scale coupling. This can occur in a very wide range of models, and helps to provide some justification for the standard predictions of the spectral index. I explain how this result can ultimately be traced to the supersymmetry structure of the theory.

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