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Title: Constraining monodromy inflation

We use cosmic microwave background (CMB) data from the 9-year WMAP release to derive constraints on monodromy inflation, which is characterized by a linear inflaton potential with a periodic modulation. We identify two possible periodic modulations that significantly improve the fit, lowering χ{sup 2} by approximately 10 and 20. However, standard Bayesian model selection criteria assign roughly equal odds to the modulated potential and the unmodulated case. A modulated inflationary potential can generate substantial primordial non-Gaussianity with a specific and characteristic form. For the best-fit parameters to the WMAP angular power spectrum, the corresponding non-Gaussianity might be detectable in upcoming CMB data, allowing nontrivial consistency checks on the predictions of a modulated inflationary potential.
Authors:
 [1] ;  [2] ;  [3]
  1. Department of Physics and Astronomy, University College London, London WC1E 6BT (United Kingdom)
  2. Department of Physics, University of Auckland, Private Bag 92019, Auckland (New Zealand)
  3. School of Natural Sciences, Institute for Advanced Study, Princeton, NJ 08540 (United States)
Publication Date:
OSTI Identifier:
22282674
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2013; Journal Issue: 09; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; APPROXIMATIONS; COSMOLOGY; ENERGY SPECTRA; INFLATIONARY UNIVERSE; LIMITING VALUES; MODULATION; PERIODICITY; POTENTIALS; RELICT RADIATION