### 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 |
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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 |
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Country | Japan |

City | Tokyo |

Period | 11/28/05 → 12/2/05 |

### Fingerprint

### ASJC Scopus subject areas

- Atomic and Molecular Physics, and Optics

### Cite this

*Proceedings of the 15th Workshop on General Relativity and Gravitation in Japan, JGRG 2005*(pp. 96-99)

**Possibility of realization of a curvaton scenario in a theory with two dilatons coupled to the scalar curvature.** / Bamba, Kazuharu; Yoshimura, Motohiko.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

*Proceedings of the 15th Workshop on General Relativity and Gravitation in Japan, JGRG 2005.*pp. 96-99, 15th Workshop on General Relativity and Gravitation in Japan, JGRG 2005, Tokyo, Japan, 11/28/05.

}

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 -