Low energy effective action for dilatonic braneworld - A formalism for inflationary braneworld

Sugumi Kanno, Jiro Soda

Research output: Contribution to journalArticlepeer-review

Abstract

We derive the low energy effective action for the dilatonic braneworld. In the case of the single-brane model, we find the effective theory is described by the Einstein-scalar theory coupled to the dark radiation. Remarkably, the dark radiation is not conserved in general due to a coupling to the bulk scalar field. The effective action incorporating Kaluza-Klein (KK) corrections is obtained and the role of the AdS/CFT correspondence in the dilatonic braneworld is revealed. In particular, it is shown that CFT matter would not be confined to the braneworld in the presence of the bulk scalar field. The relation between our analysis and the geometrical projection method is also clarified. In the case of the two-brane model, the effective theory reduces to a scalar-tensor theory with a non-trivial coupling between the radion and the bulk scalar field.

Original languageEnglish
Pages (from-to)689-712
Number of pages24
JournalGeneral Relativity and Gravitation
Volume36
Issue number4
DOIs
Publication statusPublished - Apr 2004

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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