Testing for double inflation with WMAP
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 infla...
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| Main Authors: | , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
22 March 2005
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| In: |
Physical review. D, Particles, fields, gravitation, and cosmology
Year: 2005, Volume: 71, Issue: 6, Pages: 063524 |
| ISSN: | 1550-2368 |
| DOI: | 10.1103/PhysRevD.71.063524 |
| Online Access: | Verlag, Volltext: http://dx.doi.org/10.1103/PhysRevD.71.063524 Verlag, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.71.063524 
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| Author Notes: | David Parkinson, Shinji Tsujikawa, Bruce A. Bassett and Luca Amendola |
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| 520 | |a 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. | ||
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