Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2007-08-03
Phys.Rev.D76:084029,2007
Physics
High Energy Physics
High Energy Physics - Theory
12 pages, no figures, RevTex 4.0; (v2) new references are added; (v3,v4) minor changes, acknowledgment is included; to appear
Scientific paper
10.1103/PhysRevD.76.084029
We extend the covariant analysis of the brane cosmological evolution in order to take into account, apart from a general matter content and an induced-gravity term on the brane, a Gauss-Bonnet term in the bulk. The gravitational effect of the bulk matter on the brane evolution can be described in terms of the total bulk mass as measured by a bulk observer at the location of the brane. This mass appears in the effective Friedmann equation through a term characterized as generalized dark radiation that induces mirage effects in the evolution. We discuss the normal and self-accelerating branches of the combined system. We also derive the Raychaudhuri equation that can be used in order to determine if the cosmological evolution is accelerating.
Apostolopoulos Pantelis S.
Brouzakis Nikolaos
Tetradis Nikolaos
Tzavara Eleftheria
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