TY - JOUR
T1 - Low energy effective action for dilatonic braneworld - A formalism for inflationary braneworld
AU - Kanno, Sugumi
AU - Soda, Jiro
N1 - Funding Information:
We would like to thank Misao Sasaki for useful discussions. This work was supported in part by Grant-in-Aid for Scientific Research Fund of the Ministry of Education, Science and Culture of Japan No. 155476 (SK) and No. 14540258 (JS). SK and JS are also supported by Grant-in-Aid for the 21st Century COE! Center for Diversity and Universality of Physics!
PY - 2004/4
Y1 - 2004/4
N2 - 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.
AB - 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.
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U2 - 10.1023/B:GERG.0000016919.07175.92
DO - 10.1023/B:GERG.0000016919.07175.92
M3 - Article
AN - SCOPUS:3542994549
VL - 36
SP - 689
EP - 712
JO - General Relativity and Gravitation
JF - General Relativity and Gravitation
SN - 0001-7701
IS - 4
ER -