Brane oscillations and the cosmic coincidence problem

Details Brane oscillations and the cosmic coincidence problem Brane oscillations and the cosmic coincidence problem

2004-02-26

arxiv.org/abs/hep-ph/0402278v2

Phys.Rev.D69:101304,2004

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, RevTeX. Comments on the renormalization of the branon mass included. Final version to appear in Phys.Rev.D (R)

Scientific paper

10.1103/PhysRevD.69.101304

We show that, under general assumptions, in six-dimensional brane-world models with compactified large extra dimensions, the energy density of brane oscillations scales as that of cold dark matter and its present value is compatible with observations. Such value is obtained from the only dimensional scale in the theory, namely, the fundamental scale of gravity in six dimensions $M_6\sim 1$ TeV, without any fine-tuning or the introduction of additional mass scales apart from the large size of the extra dimensions. It has been suggested that the same kind of models could provide also the correct magnitude of the cosmological constant. This observation can be relevant for the resolution of the cosmic coincidence problem in the brane-world scenario.

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