6533b871fe1ef96bd12d1102
RESEARCH PRODUCT
Running of featureful primordial power spectra
Olga MenaStefano GariazzoVíctor MirallesLotfi BoubekeurHéctor Ramírezsubject
PhysicsCosmology and Nongalactic Astrophysics (astro-ph.CO)010308 nuclear & particles physicsCosmic microwave backgroundSpectral densityFOS: Physical sciencesCosmological modelAstrophysicsAstrophysics::Cosmology and Extragalactic AstrophysicsPolarization (waves)01 natural sciencesSpectral linesymbols.namesake0103 physical sciencessymbolsStatistical analysisPlanck010306 general physicsAnisotropyAstrophysics - Cosmology and Nongalactic Astrophysicsdescription
Current measurements of the temperature and polarization anisotropy power spectra of the Cosmic Microwave Background (CMB) seem to indicate that the naive expectation for the slow-roll hierarchy within the most simple inflationary paradigm may not be respected in nature. We show that a primordial power spectra with localized features could in principle give rise to the observed slow-roll anarchy when fitted to a featureless power spectrum. Future CMB missions have the key to disentangle among the two possible paradigms and firmly establish the slow-roll mechanism as the responsible one for the inflationary period in the early universe. From a model comparison perspective, and assuming that nature has chosen a featureless primordial power spectrum, we find that, while with mock Planck data there is only weak evidence against a model with localized features, upcoming CMB measurements may provide strong evidence against such a non-standard primordial power spectrum.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-01-31 | Physical Review D |