PT Journal
AU Gariazzo, S
   Mena, O
   Miralles, V
   Ramirez, H
   Boubekeur, L
TI Running of featureful primordial power spectra
SO Physical Review D
JI Phys. Rev. D
PY 2017
BP 123534
EP 7pp
VL 95
IS 12
DI 10.1103/PhysRevD.95.123534
LA English
AB 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.
ER