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Folded resonant non-Gaussianity in general single field inflation

Journal of Cosmology and Astroparticle Physics, ISSN: 1475-7516, Vol: 2010, Issue: 12, Page: 003-003
2010
  • 81
    Citations
  • 0
    Usage
  • 11
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    81
    • Citation Indexes
      81
  • Captures
    11

Article Description

We compute a novel type of large non-Gaussianity due to small periodic features in general single field inflationary models. We show that the non-Bunch-Davies vacuum component generated by features, although has a very small amplitude, can have significant impact on the non-Gaussianity. Three mechanisms are turned on simultaneously in such models, namely the resonant effect, non-Bunch-Davies vacuum and higher derivative kinetic terms, resulting in a bispectrum with distinctive shapes and running. The size can be equal to or larger than that previously found in each single mechanism. Our full results, including the resonant and folded resonant non-Gaussianities, give the leading order bispectra due to general periodic features in general single field inflation. © 2010 IOP Publishing Ltd and SISSA.

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