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Publication . Article . Preprint . 2013

Constraining monodromy inflation

Hiranya V. Peiris; Richard Easther; Raphael Flauger;
Open Access
Published: 01 Sep 2013 Journal: Journal of Cosmology and Astroparticle Physics, volume 2,013, pages 18-18 (eissn: 1475-7516, Copyright policy )
Publisher: IOP Publishing

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, but it is unclear whether this improvement is associated with a "signal" or with the scatter in the measured angular power spectrum. The unmodulated potential is mildly favored by standard model selection criteria. A modulated inflationary potential can generate substantial primordial non-Gaussianity, of 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.

Version 3 -- minor editorial corrections. Version 2 -- significant revision from v1 (Overall amplitude of the potential added as a free parameter; still see two localized peaks in modulation frequency, but the best fit has significantly improved, to -2 \Delta log(L) ~ -20 with respect to reference model)

Subjects by Vocabulary

Microsoft Academic Graph classification: CMB cold spot Non-Gaussianity Inflaton Monodromy Inflation (cosmology) Cosmology Physics Cosmic microwave background Cosmic background radiation Particle physics

arXiv: Astrophysics::Cosmology and Extragalactic Astrophysics


Astronomy and Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics, High Energy Physics - Phenomenology, High Energy Physics - Theory, Cosmology and Nongalactic Astrophysics (astro-ph.CO), High Energy Physics - Phenomenology (hep-ph), High Energy Physics - Theory (hep-th), FOS: Physical sciences

Related Organizations
Funded by
NSF| CAREER: Strings on the Horizon: Exploring the Interface of High Energy Physics and Cosmology
  • Funder: National Science Foundation (NSF)
  • Project Code: 0645435
  • Funding stream: Directorate for Mathematical & Physical Sciences | Division of Physics
NSF| Probing Fundamental Physics on Cosmological Scales
  • Funder: National Science Foundation (NSF)
  • Project Code: 0855425
  • Funding stream: Directorate for Mathematical & Physical Sciences | Division of Physics
Understanding the Origin of Cosmic Structure
  • Funder: European Commission (EC)
  • Project Code: 306478
  • Funding stream: FP7 | SP2 | ERC
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