A four-dimensional description of five-dimensional N-brane models

Details A four-dimensional description of five-dimensional N-brane models A four-dimensional description of five-dimensional N-brane models

2010-04-14

arxiv.org/abs/1004.2477v2

Phys.Rev.D82:124013,2010

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

26 pages, 1 figure. Version 2 adds a new section 2, and clarifies sections 4 and 5C

Scientific paper

10.1103/PhysRevD.82.124013

We propose a new method for obtaining the four-dimensional effective gravitational theory for five-dimensional braneworld models with arbitrary numbers of branes in a low energy regime, based on a two-lengthscale expansion. The method is straightforward and computationally efficient, and is applicable to both compactified and uncompactified models. Particular emphasis is placed on the behavior of the radion modes of the model, while the massive effective fields are automatically truncated. Generally, the radion modes are found to form a (N-1)-dimensional nonlinear sigma model. We illustrate the method for a N-brane model in an uncompactified extra dimension.

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