Abstract
The possibility of realization of a curvaton scenario is studied in a theory in which two dilatons are introduced along with coupling to the scalar curvature. It is shown that when two dilatons have an approximate O(2) symmetric coupling, a scalar field playing the role of the curvaton may exist in the framework of this theory without introducing any other scalar field for the curvaton. Thus the curvaton scenario can be realized, and in the simple version of the curvaton scenario in which the curvaton potential is quadratic, the curvature perturbation having an enough amplitude and a nearly scale-invariant spectrum suggested by observations obtained from WMAP could be generated.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the 15th Workshop on General Relativity and Gravitation in Japan, JGRG 2005 |
| Pages | 96-99 |
| Number of pages | 4 |
| Publication status | Published - 2005 |
| Event | 15th Workshop on General Relativity and Gravitation in Japan, JGRG 2005 - Tokyo, Japan Duration: Nov 28 2005 → Dec 2 2005 |
Other
| Other | 15th Workshop on General Relativity and Gravitation in Japan, JGRG 2005 |
|---|---|
| Country | Japan |
| City | Tokyo |
| Period | 11/28/05 → 12/2/05 |
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ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
Cite this
Possibility of realization of a curvaton scenario in a theory with two dilatons coupled to the scalar curvature. / Bamba, Kazuharu; Yoshimura, Motohiko.
Proceedings of the 15th Workshop on General Relativity and Gravitation in Japan, JGRG 2005. 2005. p. 96-99.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
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TY - GEN
T1 - Possibility of realization of a curvaton scenario in a theory with two dilatons coupled to the scalar curvature
AU - Bamba, Kazuharu
AU - Yoshimura, Motohiko
PY - 2005
Y1 - 2005
N2 - The possibility of realization of a curvaton scenario is studied in a theory in which two dilatons are introduced along with coupling to the scalar curvature. It is shown that when two dilatons have an approximate O(2) symmetric coupling, a scalar field playing the role of the curvaton may exist in the framework of this theory without introducing any other scalar field for the curvaton. Thus the curvaton scenario can be realized, and in the simple version of the curvaton scenario in which the curvaton potential is quadratic, the curvature perturbation having an enough amplitude and a nearly scale-invariant spectrum suggested by observations obtained from WMAP could be generated.
AB - The possibility of realization of a curvaton scenario is studied in a theory in which two dilatons are introduced along with coupling to the scalar curvature. It is shown that when two dilatons have an approximate O(2) symmetric coupling, a scalar field playing the role of the curvaton may exist in the framework of this theory without introducing any other scalar field for the curvaton. Thus the curvaton scenario can be realized, and in the simple version of the curvaton scenario in which the curvaton potential is quadratic, the curvature perturbation having an enough amplitude and a nearly scale-invariant spectrum suggested by observations obtained from WMAP could be generated.
UR - http://www.scopus.com/inward/record.url?scp=84887472989&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84887472989&partnerID=8YFLogxK
M3 - Conference contribution
SP - 96
EP - 99
BT - Proceedings of the 15th Workshop on General Relativity and Gravitation in Japan, JGRG 2005
ER -