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From New to Large Field Inflation: Comparison with WMAP3

We briefly summarize and update a class of inflationary models from the early eighties based on a quartic (Coleman-Weinberg) potential for a gauge singlet scalar (inflaton) field. For vacuum energy scales comparable to the grand unification scale, the scalar spectral index n_s=0.94-0.97, in very good agreement with the WMAP three year results. The tensor to scalar ratio r<~0.14 while alpha=dn_s/d ln k=~-10^-3. For vacuum energy scales >~10^16 GeV, the inflationary scenario switches from `new&#39; to `large-field&#39; (V\proptoϕ^2) inflation. An SO(10) version naturally explains the observed baryon asymmetry via non-thermal leptogenesis.

preprint2007arXivOpen access
Q. ShafiV. N. Senoguz
astro-ph
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Q. ShafiV. N. Senoguz

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