Possibility of realization of a curvaton scenario in a theory with two dilatons coupled to the scalar curvature

Kazuharu Bamba, Motohiko Yoshimura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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 languageEnglish
Title of host publicationProceedings of the 15th Workshop on General Relativity and Gravitation in Japan, JGRG 2005
Pages96-99
Number of pages4
Publication statusPublished - 2005
Event15th Workshop on General Relativity and Gravitation in Japan, JGRG 2005 - Tokyo, Japan
Duration: Nov 28 2005Dec 2 2005

Other

Other15th Workshop on General Relativity and Gravitation in Japan, JGRG 2005
CountryJapan
CityTokyo
Period11/28/0512/2/05

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ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Bamba, K., & Yoshimura, M. (2005). Possibility of realization of a curvaton scenario in a theory with two dilatons coupled to the scalar curvature. In Proceedings of the 15th Workshop on General Relativity and Gravitation in Japan, JGRG 2005 (pp. 96-99)