Intermediate inflation in light of the three-year WMAP observations

Abstract

The three-year observations from the Wilkinson Microwave Anisotropy Probe have been hailed as giving the first clear indication of a spectral index n_s<1. We point out that the data are equally well explained by retaining the assumption n_s=1 and allowing the tensor-to-scalar ratio r to be non-zero. The combination n_s=1 and r>0 is given (within the slow-roll approximation) by a version of the intermediate inflation model with expansion rate H(t) \propto t^{-1/3}. We assess the status of this model in light of the WMAP3 data.

arXiv comment4 pages RevTeX4 with one figure. Minor changes to match PRD accepted version

References in corpus (16)

• Quintessence, Cosmic Coincidence, and the Cosmological Constant
• Reconstructing the Inflaton Potential --- an Overview
• Formalising the Slow-Roll Approximation in Inflation
• Cosmological parameters from combining the Lyman-alpha forest with CMB, galaxy clustering and SN constraints
• A more accurate analytic calculation of the spectrum of cosmological perturbations produced during inflation
• A classification of scalar field potentials with cosmological scaling solutions
• Inflation after WMAP3: Confronting the Slow-Roll and Exact Power Spectra with CMB Data
• Perturbation Spectra from Intermediate Inflation
• Inflation model constraints from the Wilkinson Microwave Anisotropy Probe three-year data
• Intermediate inflation and the slow-roll approximation
• A Bayesian model selection analysis of WMAP3
• The Lyman-alpha forest and WMAP year three
• Recovering the Inflationary Potential and Primordial Power Spectrum With a Slow Roll Prior: Methodology and Application to WMAP 3 Year Data
• Inflaton field potential producing the exactly flat spectrum of adiabatic perturbations
• Inflationary potentials yielding constant scalar perturbation spectral indices
• Constraints on the Inflationary Expansion from Three Year WMAP, small scale CMB anisotropies and Large Scale Structure Data Sets

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