05 06 13 7 v 4 1 8 D ec 2 00 6 Constraints on Gauss-Bonnet Gravity in Dark Energy Cosmologies


Models with a scalar field coupled to the Gauss-Bonnet Lagrangian appear naturally from Kaluza-Klein compactifications of pure higher-dimensional gravity. We study linear, cosmological perturbations in the limits of weak coupling and slow-roll, and derive simple expressions for the main observable sub-horizon quantities: the anisotropic stress factor, the… (More)

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