Non-Gaussianity in Curvaton Models with Nearly Quadratic Potential
| dc.creator | Enqvist, Kari | |
| dc.creator | Nurmi, Sami | |
| dc.date | 2005-08-26 | |
| dc.date | 2005-09-06 | |
| dc.date.accessioned | 2026-07-07T11:24:43Z | |
| dc.date.available | 2026-07-07T11:24:43Z | |
| dc.description | We consider curvaton models with potentials that depart slightly from the quadratic form. We show that although such a small departure does not modify significantly the Gaussian part of the curvature perturbation, it can have a pronounced effect on the level of non-Gaussianity. We find that unlike in the quadratic case, the limit of small non-Gaussianity, $|f_{NL}|\ll1$, is quite possible even with small curvaton energy density $r\ll1$ . Furthermore, non-Gaussianity does not imply any strict bounds on $r$ but the bounds depend on the assumptions about the higher order terms in the curvaton potential. | |
| dc.description | 11 pages, 3 figures. Minor changes. Typos corrected and a reference added | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0508573 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0508573 | |
| dc.identifier | JCAP0510:013,2005 | |
| dc.identifier | doi:10.1088/1475-7516/2005/10/013 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/195285 | |
| dc.subject | Astrophysics | |
| dc.title | Non-Gaussianity in Curvaton Models with Nearly Quadratic Potential | |
| dc.type | text |