期刊
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
卷 -, 期 2, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1475-7516/2015/02/027
关键词
inflation; CMBR experiments; alternatives to inflation; cosmological perturbation theory
资金
- NSF [PHY-1417421]
- Starting Grant of the European Research Council (ERC STG grant) [279617]
- Stephen Hawking Advanced Fellowship
- BIS National E-infrastructure capital grant [ST/J005673/1]
- STFC grants [ST/H008586/1, ST/K00333X/1]
- STFC [ST/H008586/1, ST/J005673/1, ST/I002006/1, ST/K00333X/1, ST/M00418X/1, ST/M007065/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/J005673/1, ST/I002006/1, ST/M00418X/1, ST/H008586/1, ST/M007065/1, ST/K00333X/1] Funding Source: researchfish
- European Research Council (ERC) [279617] Funding Source: European Research Council (ERC)
- Direct For Mathematical & Physical Scien
- Division Of Physics [1417421] Funding Source: National Science Foundation
Oscillating massive fields in the primordial universe can be used as Standard Clocks. The ticks of these oscillations induce features in the density perturbations, which directly record the time evolution of the scale factor of the primordial universe, thus if detected, provide a direct evidence for the inflation scenario or the alternatives. In this paper, we construct a full inflationary model of primordial Standard Clock and study its predictions on the density perturbations. This model provides a full realization of several key features proposed previously. We compare the theoretical predictions from inflation and alternative scenarios with the Planck 2013 temperature data on Cosmic Microwave Background (CMB), and identify a statistically marginal but interesting candidate. We discuss how future CMB temperature and polarization data, non-Gaussianity analysis and Large Scale Structure data may be used to further test or constrain the Standard Clock signals.
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