Non-Gaussianity and gravitational wave background in curvaton with a double well potential
Journal Article
·
· Physical Review. D, Particles Fields
- Department of Physics, Pusan National University, Busan 609-735 (Korea, Republic of)
We study the density perturbation by a curvaton with a double well potential and give analytical expressions for the observables such as nonlinear parameters f{sub NL}, g{sub NL} and tensor-to-scalar ratio r{sub T} with emphasizing the differences from the simple quadratic potential. We show that the level of non-Gaussianity and the tensor-to-scalar ratio depends crucially on the reheating temperature as well as the curvaton self-coupling constant for a given initial amplitude of the curvaton. We find that for a large initial field the nonlinear parameters f{sub NL} can be 10-20 and the gravitational wave background also is observable in the Planck satellite.
- OSTI ID:
- 21503607
- Journal Information:
- Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 10 Vol. 82; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
Similar Records
Primordial non-Gaussianity from mixed inflaton-curvaton perturbations
Non-Gaussianity and gravitational waves from a quadratic and self-interacting curvaton
Signatures of non-Gaussianity in the curvaton model
Journal Article
·
Fri Jun 01 00:00:00 EDT 2012
· Journal of Cosmology and Astroparticle Physics
·
OSTI ID:22280012
Non-Gaussianity and gravitational waves from a quadratic and self-interacting curvaton
Journal Article
·
Tue Mar 15 00:00:00 EDT 2011
· Physical Review. D, Particles Fields
·
OSTI ID:21537545
Signatures of non-Gaussianity in the curvaton model
Journal Article
·
Mon Sep 15 00:00:00 EDT 2008
· Journal of Cosmology and Astroparticle Physics
·
OSTI ID:22156742