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The Cosmological Constant Problemin Brane-world Cosmology

Published online by Cambridge University Press:  30 September 2008

A. Oscoz ,
E. Mediavilla ,
M. Serra-Ricart  and
M.D. Maia
M.D. Maia*
Affiliation:
Instituto de Física, Universidade de Brasília, 70919-970, Brasília, D.F.
*
[email protected]
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Abstract

It is shown that the cosmological constant problem inbrane-world is different from the same problem in generalrelativity, essentially because the gauge fields fields contributingto the vacuum energy are confined to the brane-world, but the cosmological term propagates in the bulk. The brane-wrld equations of motioninclude a second order, conserved symmetric tensor field infour dimensions defined by the extrinsic curvature, whichadjusts the vacuum energy. In the application to theFRW brane-world universe embedded in a five-dimensional deSitterbulk, that tensor modifies Friedman's equation with a remarkable agreement with the current gold set of cosmological data.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 30: Spanish Relativity Meeting - Encuentros Relativistas Españoles, ERE2007: Relativistic Astrophysics and Cosmology , 2008 , pp. 319 - 322
Copyright
© EAS, EDP Sciences, 2008

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