PT Journal
AU Pandolfi, S
   Cooray, A
   Giusarma, E
   Kolb, EW
   Melchiorri, A
   Mena, O
   Serra, P
TI Harrison-Zel'dovich primordial spectrum is consistent with observations
SO Physical Review D
JI Phys. Rev. D
PY 2010
BP 123509
EP 6pp
VL 81
IS 12
DI 10.1103/PhysRevD.81.123509
LA English
AB Inflation predicts primordial scalar perturbations with a nearly scale-invariant spectrum and a spectral index approximately unity [the Harrison-Zel'dovich (HZ) spectrum]. The first important step for inflationary cosmology is to check the consistency of the HZ primordial spectrum with current observations. Recent analyses have claimed that a HZ primordial spectrum is excluded at more than 99% c. l. Here we show that the HZ spectrum is only marginally disfavored if one considers a more general reionization scenario. Data from the Planck mission will settle the issue.
ER