Non-Gaussianity from Baryon Asymmetry
| dc.creator | Kawasaki, Masahiro | |
| dc.creator | Nakayama, Kazunori | |
| dc.creator | Takahashi, Fuminobu | |
| dc.date | 2008-09-12 | |
| dc.date | 2008-12-04 | |
| dc.date.accessioned | 2026-07-07T12:28:45Z | |
| dc.date.available | 2026-07-07T12:28:45Z | |
| dc.description | We study a scenario that large non-Gaussianity arises from the baryon asymmetry of the Universe. There are baryogenesis scenarios containing a light scalar field, which may result in baryonic isocurvature perturbations with some amount of non-Gaussianity. As an explicit example we consider the Affleck-Dine mechanism and show that a flat direction of the supersymmeteric standard model can generate large non-Gaussianity in the curvature perturbations, satisfying the observational constraints on the baryonic isocurvature perturbations. The sign of a non-linearity parameter, f_{NL}, is negative, if the Affleck-Dine mechanism accounts for the observed baryon asymmetry; otherwise it can be either positive or negative. | |
| dc.description | 25 pages, 7 figures; minor correction, references added; version to appear in JCAP | |
| dc.identifier | https://arxiv.org/abs/0809.2242 | |
| dc.identifier | http://arxiv.org/abs/0809.2242 | |
| dc.identifier | JCAP 0901:002,2009 | |
| dc.identifier | doi:10.1088/1475-7516/2009/01/002 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/215644 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.subject | Astrophysics | |
| dc.title | Non-Gaussianity from Baryon Asymmetry | |
| dc.type | text |