Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2003-03-24
Gen.Rel.Grav. 36 (2004) 689-712
Physics
High Energy Physics
High Energy Physics - Theory
17 pages, Version to be published in General Relativity and Gravitation
Scientific paper
10.1023/B:GERG.0000016919.07175.
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.
Kanno Sugumi
Soda Jiro
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