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Simple brane-world inflationary models — An update

Okada, Nobuchika; Okada, Satomi

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 (ns) and the tensor-to-scalar ratio (r) from thos…

Constraints on the birth of the universe and origin of cosmic dark flow

Garnavich, P.; Mathews, G. J.; Gangopadhyay, M. R. +4 more

We summarize three recent efforts to constrain the first few moments of cosmic creation before and during the epoch of inflation. We consider two means to explain a slight dip in the power spectrum of the cosmic microwave background for multipoles in the range of ℓ = 10-30 from both the Planck and WMAP data. We show that such a dip could be the re…