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Primordial Spectral Indices from Generalized Einstein Theories | | David Kaiser
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15 Aug 1994 | | Journal: | Phys.Rev. D52 (1995) 4295-4306 | | Subject: | astro-ph gr-qc hep-ph | | Abstract: | Primordial spectral indices are calculated to second order in slow-roll parameters for three closely-related models of inflation, all of which contain a scalar field non-minimally coupled to the Ricci curvature scalar. In most cases, $n_s$ may be written as a function of the non-minimal curvature coupling strength $xi$ alone, with $n_s (xi) leq 1$, although the constraints on $xi$ differ greatly between lq new inflation’ and lq chaotic inflation’ initial conditions. Under lq new inflation’ initial conditions, there are discrepancies between the values of $n_s$ as calculated in the Einstein frame and the Jordan frame. The sources for these discrepancies are addressed, and shown to have negligible effects on the numerical predictions for $n_s$. No such discrepancies affect the calculations under lq chaotic inflation’ initial conditions. | | Source: | arXiv, astro-ph/9408044 | | Services: | Forum | Review | PDF | Favorites | |
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