Fine Features in the Primordial Power Spectrum

Details Fine Features in the Primordial Power Spectrum Fine Features in the Primordial Power Spectrum

2011-05-12

arxiv.org/abs/1105.2398v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

15 pages, 11 figures, submitted to JCAP

Scientific paper

A possible origin of the anomalous dip and bump in the primordial power spectrum, which are reconstructed from WMAP data corresponding to the multipole $\ell=100\sim 140$ by using the inversion method, is investigated as a consequence of modification of scalar field dynamics in the inflation era. Utilizing an analytic formula to handle higher order corrections to the slow-roll approximation, we evaluate the relation between a detailed shape of inflaton potential and a fine structure in the primordial power spectrum. We conclude that it is unlikely to generate the observed dip and bump in the power spectrum by adding any features in the inflaton potential. Though we can make a fine enough shape in the power spectrum by controlling the feature of the potential, the amplitude of the dip and bump becomes too small in that case.

Affiliated with

Also associated with

No associations

Rating

Fine Features in the Primordial Power Spectrum does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Fine Features in the Primordial Power Spectrum, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fine Features in the Primordial Power Spectrum will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-496722