publication . Article . 2013

Constraining monodromy inflation

Hiranya V. Peiris; Richard Easther; Raphael Flauger;
Open Access
  • Published: 11 Sep 2013 Journal: Journal of Cosmology and Astroparticle Physics, volume 2,013, pages 18-18 (eissn: 1475-7516, Copyright policy)
  • Publisher: IOP Publishing
Abstract
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 correspondin...
Persistent Identifiers
Subjects
arXiv: Astrophysics::Cosmology and Extragalactic Astrophysics
free text keywords: Astronomy and Astrophysics, Cosmic microwave background, Cosmology, Inflation (cosmology), Monodromy, Cosmic background radiation, CMB cold spot, Inflaton, Physics, Non-Gaussianity, Particle physics
Funded by
EC| COSMICDAWN
Project
COSMICDAWN
Understanding the Origin of Cosmic Structure
  • Funder: European Commission (EC)
  • Project Code: 306478
  • Funding stream: FP7 | SP2 | ERC
,
NSF| Probing Fundamental Physics on Cosmological Scales
Project
  • Funder: National Science Foundation (NSF)
  • Project Code: 0855425
  • Funding stream: Directorate for Mathematical & Physical Sciences | Division of Physics
,
NSF| CAREER: Strings on the Horizon: Exploring the Interface of High Energy Physics and Cosmology
Project
  • Funder: National Science Foundation (NSF)
  • Project Code: 0645435
  • Funding stream: Directorate for Mathematical & Physical Sciences | Division of Physics
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