Four-dimensional gravity from singular spaces

被引：7
|
作者：
Brax, P [1 ]
van de Bruck, C
Davis, AC
Rhodes, CS
机构：
[1] CEA Saclay, Serv Phys Theor, F-91191 Gif Sur Yvette, France
[2] Univ Cambridge, Ctr Math Sci, Dept Appl Math & Theoret Phys, Cambridge CB3 0WA, England
来源：
PHYSICAL REVIEW D | 2002年 / 65卷 / 12期
关键词：
D O I：
10.1103/PhysRevD.65.121501
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The modification to four-dimensional Einstein gravity at low energy in two brane models is investigated within supergravity in singular spaces. Using perturbation theory around a static Bogomol'nyi-Prasad-Sommerfield background, we study the effective four-dimensional gravitational theory, a scalar-tensor theory, and derive the Brans-Dicke parameter when matter is present on the positive tension brane only. We show there is an attractor mechanism towards general relativity in the matter dominated era. The dynamics of the interbrane distance are discussed. Finally, when matter lives on both branes, we find that there is a violation of the equivalence principle whose magnitude is governed by the warping of the extra dimension.
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页数：5
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