Fingerprints of Primordial Universe Paradigms as Features in Density Perturbations

Details Fingerprints of Primordial Universe Paradigms as Features in Density Perturbations Fingerprints of Primordial Universe Paradigms as Features in Density Perturbations

2011-06-08

arxiv.org/abs/1106.1635v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

12 pages, a short companion paper to arXiv:1104.1323 [hep-th]

Scientific paper

Experimentally distinguishing different primordial universe paradigms that lead to the Big Bang model is an outstanding challenge in modern cosmology and astrophysics. We show that a generic type of signals that exist in primordial universe models can be used for such purpose. These signals are induced by tiny oscillations of massive fields and manifest as features in primordial density perturbations. They are capable of recording the time-dependence of the scale factor of the primordial universe, and therefore provide direct evidence for specific paradigm.

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