Supercurvaton
Abstract
We discuss observational consequences of the curvaton scenario, which naturally appears in the context of the simplest model of chaotic inflation in supergravity. The non-gaussianity parameter fNL in this scenario is very sensitive to the choice of the model parameters; it can be either very small or very large. Under certain conditions, this parameter can take values in the observationally interesting range from O(10) to O(100). We point out that local fNL can take different values in different parts of the universe. The regions where fNL is particularly large form a curvaton web resembling a net of thick domain walls, strings, or global monopoles.
- Publication:
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Journal of Cosmology and Astroparticle Physics
- Pub Date:
- April 2011
- DOI:
- 10.1088/1475-7516/2011/04/013
- arXiv:
- arXiv:1012.0549
- Bibcode:
- 2011JCAP...04..013D
- Keywords:
-
- High Energy Physics - Theory;
- Astrophysics - Cosmology and Nongalactic Astrophysics;
- General Relativity and Quantum Cosmology;
- High Energy Physics - Phenomenology
- E-Print:
- 17 pages, 1 figure. Non-perturbative effects related to non-gaussianity in the curvaton scenario are discussed, some references are added. This is the version accepted in JCAP