| Issue |
EAS Publications Series
Volume 30, 2008
Spanish Relativity Meeting - Encuentros Relativistas Españoles , ERE2007: Relativistic Astrophysics and Cosmology
|
|
|---|---|---|
| Page(s) | 319 - 322 | |
| DOI | https://doi.org/10.1051/eas:0830053 | |
| Published online | 30 September 2008 | |
A. Oscoz, E. Mediavilla and M. Serra-Ricart (eds)
EAS Publications Series, 30 (2008) 319-322
The Cosmological Constant Problem in Brane-world Cosmology
Instituto de Física, Universidade de Brasília,
70919-970, Brasília, D.F.
Corresponding author: maia@unb.br
It is shown that the cosmological constant problem in brane-world is different from the same problem in general relativity, essentially because the gauge fields fields contributing to the vacuum energy are confined to the brane-world, but the cosmological term propagates in the bulk. The brane-wrld equations of motion include a second order, conserved symmetric tensor field in four dimensions defined by the extrinsic curvature, which adjusts the vacuum energy. In the application to the FRW brane-world universe embedded in a five-dimensional deSitter bulk, that tensor modifies Friedman's equation with a remarkable agreement with the current gold set of cosmological data.
© EAS, EDP Sciences, 2008