科研之友
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摘要
A UV/IR complete theory of cosmological inflation is constructed in a braneworld setup that the inflaton field evolves on a DGP brane and the curvature effect is incorporated via the Gauss-Bonnet term in the bulk action. While the Induced Gravity on the DGP brane is a manifestation of the IR limit, the stringy Gauss-Bonnet effect in the bulk action realizes the UV sector of the scenario. This scenario generally supports a red power spectrum of perturbations, and for a large field regime requires a smaller number of e-folds than other braneworld inflation scenarios given the same assumptions. For the tensor-to-scalar ratio, this inflation scenario gives a better fit to observation than alternative scenarios.
- 出版日期2010-9
