Published February 5, 2014
| Version v1
Journal article
Curvaton with nonminimal derivative coupling to gravity
- 1. School of Physics, University of Chinese Academy of Sciences, Beijing 100049 (China)
- 2. Institute of Astrophysics, Central China Normal University, Wuhan 430079 (China)
- 3. Department of Physics and Center for Theoretical Sciences, National Taiwan University, Taipei 10617, Taiwan (China)
- 4. Leung Center for Cosmology and Particle Astrophysics, National Taiwan University, Taipei 106, Taiwan (China)
Description
We show a curvaton model, in which the curvaton has a nonminimal derivative coupling to gravity. Thanks to such a coupling, we find that the scale-invariance of the perturbations can be achieved for arbitrary values of the equation-of-state of background, provided that it is nearly a constant. We also discussed about tensor perturbations, the local non-Gaussianities generated by the nonminimal derivative coupling curvaton model, as well as the adiabatic perturbations which are transferred from the field perturbations during the curvaton decay
Availability note (English)
Available from http://dx.doi.org/10.1016/j.physletb.2014.01.008Additional details
Identifiers
- DOI
- 10.1016/j.physletb.2014.01.008;
- arXiv
- arXiv:1307.7864v2;
- PII
- S0370-2693(14)00020-3;
Publishing Information
- Journal Title
- Physics Letters. Section B
- Journal Volume
- 729
- Journal Page Range
- p. 99-107
- ISSN
- 0370-2693
- CODEN
- PYLBAJ
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 45063081
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Descriptors DEI
- COUPLING; EQUATIONS OF STATE; GRAVITATION; PERTURBATION THEORY; SCALE INVARIANCE
- Descriptors DEC
- EQUATIONS; INVARIANCE PRINCIPLES
Optional Information
- Copyright
- Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.