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- W219942079 abstract "Harish-Chandra Research Institute, Chhatnag Road, Jhunsi, Allahabad 211019, India.(Dated: June 15, 2011)Amongst the multitude of inflationary models currently available, models that lead to featuresin the primordial scalar spectrum are drawing increasing attention, since certain features havebeen found to provide a better fit to the CMB data than the conventional, nearly scale invariant,primordial spectrum. In this work, we carry out an exact numerical analysis of two models thatlead to oscillations over all scales in the scalar power spectrum. We consider the model describedby a quadratic potential which is superposed by a sinusoidal modulation and the recently popularaxion monodromy model. Since the oscillations continue even onto smaller scales, in addition tothe WMAP data, we also compare the models with the small scale data from ACT. Though, boththe models, broadly, result in oscillations in the spectrum, interestingly, we find that, while themonodromy model leads to a considerably better fit to the data in comparison to the standard powerlaw spectrum, the quadratic potential superposed with a sinusoidal modulation does not improvethe fit to a similar extent. We also carry out forecasting of the parameters using simulated Planckdata for both the models. We show that the Planck mock data performs better in constraining themodel parameters as compared to the presently available CMB datasets." @default.
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- W219942079 date "2011-06-15" @default.
- W219942079 modified "2023-09-27" @default.
- W219942079 title "Oscillations in the inflaton potential: Exact numerical analysis and comparison with the recent and forthcoming CMB datasets" @default.
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