Large Scale Structure Forecast Constraints on Particle Production During Inflation

Details Large Scale Structure Forecast Constraints on Particle Production During Inflation Large Scale Structure Forecast Constraints on Particle Production During Inflation

2010-09-29

arxiv.org/abs/1009.5858v3

Phys.Rev.D83:103501,2011

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

10 pages. Matches PRD accepted version

Scientific paper

10.1103/PhysRevD.83.103501

Bursts of particle production during inflation provide a well-motivated mechanism for creating bump like features in the primordial power spectrum. Current data constrains these features to be less than about 5% the size of the featureless primordial power spectrum at wavenumbers of about 0.1 h Mpc^{-1}. We forecast that the Planck cosmic microwave background experiment will be able to strengthen this constraint to the 0.5% level. We also predict that adding data from a square kilometer array (SKA) galaxy redshift survey would improve the constraint to about the 0.1% level. For features at larger wave-numbers, Planck will be limited by Silk damping and foregrounds. While, SKA will be limited by non-linear effects. We forecast for a Cosmic Inflation Probe (CIP) galaxy redshift survey, similar constraints can be achieved up to about a wavenumber of 1 h Mpc^{-1}.

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