Cosmological and astrophysical limits on brane fluctuations

Details Cosmological and astrophysical limits on brane fluctuations Cosmological and astrophysical limits on brane fluctuations

2003-07-04

arxiv.org/abs/hep-ph/0307062v2

Phys.Rev.D68:103505,2003

Physics

High Energy Physics

High Energy Physics - Phenomenology

26 pages, 6 figures, LaTeX. Final version with minor corrections. To appear in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.68.103505

We consider a general brane-world model parametrized by the brane tension scale $f$ and the branon mass $M$. For low tension compared to the fundamental gravitational scale, we calculate the relic branon abundance and its contribution to the cosmological dark matter. We compare this result with the current observational limits on the total and hot dark matter energy densities and derive the corresponding bounds on $f$ and $M$. Using the nucleosynthesis bounds on the number of relativistic species, we also set a limit on the number of light branons in terms of the brane tension. Finally, we estimate the bounds coming from the energy loss rate in supernovae explosions due to massive branon emission.

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