期刊
PHYSICAL REVIEW D
卷 83, 期 10, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.83.103501
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资金
- Institute for the Promotion of Teaching Science and Technology (IPST) in Thailand
- Beecroft Institute for Particle Astrophysics and Cosmology
- STFC [ST/H002456/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/H002456/1] Funding Source: researchfish
Bursts of particle production during inflation provide a well-motivated mechanism for creating bump-like features in the primordial power spectrum. Current data constrain these features to be less than about 5% the size of the featureless primordial power spectrum at wave numbers of about 0.1h 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 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 the square kilometer array will be limited by nonlinear effects. We forecast, for a cosmic inflation probe galaxy redshift survey, that similar constraints can be achieved up to about a wave number of 1.0h Mpc(-1).
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