Non-Gaussianity from Baryon Asymmetry

Thumbnail Image

Date

Authors

Journal Title

Journal ISSN

Volume Title

Publisher

Abstract

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.
25 pages, 7 figures; minor correction, references added; version to appear in JCAP

Keywords

High Energy Physics - Phenomenology, Astrophysics

Citation

URI

http://salesiana.dossiersoluciones.com/handle/123456789/215644

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0809.2242
 http://arxiv.org/abs/0809.2242
 JCAP 0901:002,2009
 doi:10.1088/1475-7516/2009/01/002

Collections

arXiv