Journal
PHYSICS LETTERS B
Volume 671, Issue 3, Pages 339-344Publisher
ELSEVIER
DOI: 10.1016/j.physletb.2008.12.034
Keywords
-
Funding
- Ministry of Education, Science, Sports, and Cultures of Japan [19540255, 19740145]
- Sumitomo Foundation
Ask authors/readers for more resources
We discuss non-Gaussianity and baryonic isocurvature fluctuations in the curvaton scenario, assuming that the baryon asymmetry of the universe originates only from the decay products of the inflaton. When large non-Gaussianity is realized in such a scenario, non-vanishing baryonic isocurvature fluctuations can also be generated unless the baryogenesis occurs after the decay of the curvaton. We calculate the non-linearity parameter f(NL) and the baryonic isocurvature fluctuations, taking account of the primordial fluctuations of both the inflaton and the curvaton. We show that, although current constraints on isocurvature fluctuations are severe, the non-linearity parameter can be large as f(NL) similar to O(10-100) without conflicting with the constraints. (C) 2008 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available