Dark Branes for Dark Matter

We propose a setup for the origin of dark matter based on spacetime with a warped extra dimension and three branes: the Planck brane, the TeV brane, at a (few) TeV scale ρ_T, and a dark brane, at a (sub)-GeV scale ρ_1≲ 100 GeV ≪ρ_T. The Standard Model is localized in the TeV brane, thus solving the Higgs hierarchy problem, while the dark matter χ, a Dirac fermion with mass m_χ<ρ_1, is localized in the dark brane. The radion, with mass m_r更多