Simple brane-world inflationary models: an update

Abstract

In the light of the Planck 2015 results, we update simple inflationary models based on the quadratic, quartic, Higgs and Coleman-Weinberg potentials in the context of the Randall-Sundrum brane-world cosmology. Brane-world cosmological effect alters 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 tensor-to-scalar ratio is enhanced in the presence of the 5th dimension. In order to maintain the consistency with the Planck 2015 results for the inflationary predictions in the standard cosmology, we find a lower bound on the five-dimensional Planck mass ($M_5$). On the other hand, the inflationary predictions laying outside of the Planck allowed region can be pushed into the allowed region by the brane-world cosmological effect with a suitable choice of $M_5$.

17 pages, 7 figures, an update of arXiv:1407.3544 with Planck 2015 results, typos corrected, new references added. arXiv admin note: substantial text overlap with arXiv:1412.8466

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Cited by in corpus (4)

• Production of Primordial Black Holes via Single Field Inflation and Observational Constraints
• New observational limits on dark radiation in brane-world cosmology
• Limits on Brane-World and Particle Dark Radiation from Big Bang Nucleosynthesis and the CMB
• Probing the era of reheating for reconstructed inflationary potential in the RS II braneworld