Dark Matter via Many Copies of the Standard Model

Details Dark Matter via Many Copies of the Standard Model Dark Matter via Many Copies of the Standard Model

2009-03-04

arxiv.org/abs/0903.0660v1

JCAP 0908:009,2009

Physics

High Energy Physics

High Energy Physics - Theory

11 pages, 2 figures

Scientific paper

10.1088/1475-7516/2009/08/009

We propose a cosmological scenario based on the assumption that the Standard Model possesses a large number of copies. It is demonstrated that baryons in the hidden copies of the standard model can naturally account for the dark matter. The right abundance of the hidden-sector baryons and the correct spectrum of density perturbations are simultaneously generated during modulated reheating. We show that for the natural values of inflaton coupling constants, dictated by unitarity, the dark-matter abundance is predicted to be proportional to the ratio of observed cosmological parameters: the square of the amplitude of cosmological perturbations and the baryon-to-photon number ratio.

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