Exploring the superimposed oscillations parameter space
(2005) Journal of Cosmology and Astroparticle Physics — Vol. 01, p. 7 (2005)
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- Authors
- Abstract
- The space of parameters characterizing an inflationary primordial power spectrum with small superimposed oscillations is explored using Monte Carlo methods. The most interesting region corresponding to high frequency oscillations is included in the analysis. The oscillations originate from some new physics taking place at the beginning of the inflationary phase and characterized by the new energy scale Mc. It is found that the standard slow roll model remains the most probable one given the first-year WMAP data. At the same time, the oscillatory models fit the data better on average, which is consistent with previous works on the subject. This is typical of a situation where volume effects in the parameter space play a significant role. Then, we find the amplitude of the oscillations to be less than 22% of the mean amplitude and the new scale Mc to be such that H/Mc<6.6 × 10−4 at 1σ level, where H is the scale of inflation.
- Affiliations
Institut d’Astrophysique de Paris, GRεCO–FRE 2435, 98bis boulevard Arago, 75014 Paris, France
Citations
Martin, J., & Ringeval, C. (2005). Exploring the superimposed oscillations parameter space. Journal of Cosmology and Astroparticle Physics, 01, 7. https://doi.org/10.1088/1475-7516/2005/01/007 (Original work published 2005)