Effect of damped oscillations in the inflationary potential. (arXiv:2110.06837v1 [astro-ph.CO])
<a href="http://arxiv.org/find/astro-ph/1/au:+Antony_A/0/1/0/all/0/1">Akhil Antony</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Jain_S/0/1/0/all/0/1">Shweta Jain</a>

We investigate the effect of damped oscillations on a nearly flat
inflationary potential and the features they produce in the power-spectrum and
bi-spectrum. We compare the model with the Planck data using Plik unbinned and
CamSpec clean likelihood and we are able to obtain noticeable improvement in
fit compared to the power-law $Lambda$CDM model. We are able to identify three
plausible candidates each for the two likelihoods used. We find that the
best-fit to Plik and CamSpec likelihoods match closely to each other. The
improvement comes from various possible outliers at the intermediate to small
scales. We also compute the bi-spectrum for the best-fits. At all limits, the
amplitude of bi-spectrum, $f_{NL}$ is oscillatory in nature and its peak value
is determined by the amplitude and frequency of the oscillations in the
potential, as expected. We find that the bi-spectrum consistency relation
strictly holds at all scales in all the best-fit candidates.

We investigate the effect of damped oscillations on a nearly flat
inflationary potential and the features they produce in the power-spectrum and
bi-spectrum. We compare the model with the Planck data using Plik unbinned and
CamSpec clean likelihood and we are able to obtain noticeable improvement in
fit compared to the power-law $Lambda$CDM model. We are able to identify three
plausible candidates each for the two likelihoods used. We find that the
best-fit to Plik and CamSpec likelihoods match closely to each other. The
improvement comes from various possible outliers at the intermediate to small
scales. We also compute the bi-spectrum for the best-fits. At all limits, the
amplitude of bi-spectrum, $f_{NL}$ is oscillatory in nature and its peak value
is determined by the amplitude and frequency of the oscillations in the
potential, as expected. We find that the bi-spectrum consistency relation
strictly holds at all scales in all the best-fit candidates.

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