Running of featureful primordial power spectra

Stefano Gariazzo, Olga Mena, Victor Miralles, Héctor Ramírez, Lotfi Boubekeur

Producción científica: Contribución a una revistaArtículorevisión exhaustiva

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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 spectrum with localized features could in principle give rise to the observed slow-roll anarchy when fitted to a featureless power spectrum. 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 missions may provide compelling evidence against such a nonstandard primordial power spectrum. This evidence could be reinforced if a featureless primordial power spectrum is independently confirmed from bispectrum and/or galaxy clustering measurements.

Idioma originalInglés
PublicaciónPhysical Review D
EstadoPublicada - 15 jun. 2017


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