Large extra dimensions, the galaxy power spectrum and the end of inflation

Details Large extra dimensions, the galaxy power spectrum and the end of inflation Large extra dimensions, the galaxy power spectrum and the end of inflation

2001-11-29

arxiv.org/abs/hep-ph/0111435v3

JHEP 0202 (2002) 024

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, 2 figures, hadronic branching+typos corrected,accepted in JHEP

Scientific paper

10.1088/1126-6708/2002/02/024

We consider the production of gravitational KK modes via cosmological photon-photon and electron-positron annihilation in models with large factorisable extra dimensions. We place constraints on this production using recent results from a joint analysis of the power spectra of the 2dF Galaxy Redshift Survey (2dFGS) and the cosmic microwave background (CMB) anisotropies. We obtain a more accurate upper limit for the temperature corresponding to matter-radiation equality and show that, even for the case of 6 extra dimensions and a fundamental scale of 1 TeV, a period of inflation is required that ends at a temperature much lower than that of the QCD phase transition.

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