Kaluza-Klein FIMP Dark Matter in Warped Extra-Dimensions

Abstract

We study for the first time the case in which Dark Matter (DM) is made of Feebly Interacting Massive Particles (FIMP) interacting just gravitationally with the standard model particles in an extra-dimensional Randall-Sundrum scenario. We assume that both the dark matter and the standard model are localized in the IR-brane and only interact via gravitational mediators, namely the graviton, the Kaluza-Klein gravitons and the radion. We found that in the early Universe DM could be generated via two main processes: the direct freeze-in and the sequential freeze-in. The regions where the observed DM relic abundance is produced are largely compatible with cosmological and collider bounds.

V2 matches the version accepted by JHEP

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• Polynomial Inflation and Dark Matter
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• Warm dark matter from a gravitational freeze-in in extra dimensions
• Graviton-photon production with a massive spin-2 particle
• FIMP Dark Matter in Clockwork/Linear Dilaton Extra-Dimensions
• Conformal Portal to Dark Matter
• Scattering Amplitudes of Massive Spin-2 Kaluza-Klein States with Matter
• Metastable Conformal Dark Matter
• Spin-dependence of Gravity-mediated Dark Matter in Warped Extra-Dimensions
• Limits on Kaluza-Klein Portal Dark Matter Models
• Prospects of five-dimensional $L_{\mu }-L_{\tau }$ gauge interactions in the light of elastic neutrino-electron scatterings: The scope of the DUNE near detector
• Gravitational SIMPs