Simple inflationary models in Gauss-Bonnet brane-world cosmology

Abstract

In light of the recent Planck 2015 results for the measurement of the CMB anisotropy, we study simple inflationary models in the context of the Gauss-Bonnet brane-world cosmology. The brane-world cosmological effect modifies the power spectra of scalar and tensor perturbations generated by inflation and causes a dramatic change for the inflationary predictions of the spectral index ($n_s$) and the tensor-to-scalar ratio ($r$) from those obtained in the standard cosmology. In particular, the power spectrum of tensor perturbation is suppressed due to the Gauss-Bonnet brane-world cosmological effect, which is in sharp contrast with inflationary scenario in the Randall-Sundrum brane-world cosmology where the power spectrum is enhanced. Hence, these two brane-world cosmological scenarios are distinguishable. With the dramatic change of the inflationary predictions, the inflationary scenario in the Gauss-Bonnet brane-world cosmology can be tested by more precise measurements of $n_s$ and future observations of the CMB $B$-mode polarization.

18 pages, 8 figures, an updated version with Planck 2015 results. arXiv admin note: substantial text overlap with arXiv:1407.3544

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Cited by in corpus (9)

• Reheating in Gauss-Bonnet-coupled inflation
• Production of Primordial Black Holes via Single Field Inflation and Observational Constraints
• Multi-kink brane in Gauss-Bonnet gravity and its stability
• Probing the era of reheating for reconstructed inflationary potential in the RS II braneworld
• Constraints on Brane-World Inflation from the CMB Power Spectrum: Revisited
• Vacuum thin shells in Einstein-Gauss-Bonnet brane-world cosmology
• Simple brane-world inflationary models: an update
• BPS brane cosmology in N=2 supergravity
• On the coupling of vector fields to the Gauss-Bonnet invariant