TY  - JOUR
AU  - Pandolfi, S.
AU  - Giusarma, E.
AU  - Kolb, E. W.
AU  - Lattanzi, M.
AU  - Melchiorri, A.
AU  - Mena, O.
AU  - Pena, M.
AU  - Cooray, A.
AU  - Serra, P.
PY  - 2010
DA  - 2010//
TI  - Impact of general reionization scenarios on extraction of inflationary parameters
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - 123527 - 10pp
VL  - 82
IS  - 12
PB  - Amer Physical Soc
AB  - Determination of whether the Harrison-Zel'dovich spectrum for primordial scalar perturbations is consistent with observations is sensitive to assumptions about the reionization scenario. In light of this result, we revisit constraints on inflationary models using more general reionization scenarios. While the bounds on the tensor-to-scalar ratio are largely unmodified, when different reionization schemes are addressed, hybrid models are back into the inflationary game. In the general reionization picture, we reconstruct both the shape and amplitude of the inflaton potential. We discuss how relaxing the simple reionization restriction affects the reconstruction of the potential through the changes in the constraints on the spectral index, the tensor-to-scalar ratio and the running of the spectral index. We also find that the inclusion of other Cosmic Microwave Background data in addition to the Wilkinson Microwave Anisotropy probe data excludes the very flat potentials typical of models in which the inflationary evolution reaches a late-time attractor, as a consequence of the fact that the running of the spectral index is constrained to be different from zero at 99% confidence level.
SN  - 1550-7998
UR  - http://arxiv.org/abs/1009.5433
UR  - https://doi.org/10.1103/PhysRevD.82.123527
DO  - 10.1103/PhysRevD.82.123527
LA  - English
N1  - ISI:000286744800007
ID  - Pandolfi_etal2010
ER  -