Testing for double inflation with WMAP

David Parkinson*, Shinji Tsujikawa, Bruce A. Bassett, Luca Amendola

*この研究の対応する著者

研究成果査読

48 被引用数 (Scopus)

抄録

With the WMAP data we can now begin to test realistic models of inflation involving multiple scalar fields. These naturally lead to correlated adiabatic and isocurvature (entropy) perturbations with a running spectral index. We present the first full (9 parameter) likelihood analysis of double inflation with WMAP data and find that despite the extra freedom, supersymmetric hybrid potentials are strongly constrained with less than 7% correlated isocurvature component allowed when standard priors are imposed on the cosomological parameters. As a result we also find that Akaike and Bayesian model selection criteria rather strongly prefer single-field inflation, just as equivalent analysis prefers a cosmological constant over dynamical dark energy in the late universe. It appears that simplicity is the best guide to our universe.

本文言語English
論文番号063524
ページ(範囲)1-7
ページ数7
ジャーナルPhysical Review D - Particles, Fields, Gravitation and Cosmology
71
6
DOI
出版ステータスPublished - 2005 3 15
外部発表はい

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学
  • 物理学および天文学(その他)

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