Warm dark matter from a gravitational freeze-in in extra dimensions

Abstract

We study the freeze-in of gravitationally interacting dark matter in extra dimensions. Focusing on a minimal dark matter candidate that only interacts with the SM via gravity in a five-dimensional model we find that a large range of dark matter and Kaluza-Klein graviton masses can lead to the observed relic density. The preferred values of the masses and the strength of the interaction make this scenario very hard to test in terrestrial experiments. However, significant parts of the parameter space lead to warm dark matter and can be tested by cosmological and astrophysical observations.

18 pages

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Cited by in corpus (5)

• Scattering Amplitudes of Massive Spin-2 Kaluza-Klein States with Matter
• Resonant probing spin-0 and spin-2 dark matter mediators with fixed target experiments
• Gravity-Matter Sum Rules in models with a single extra-dimension
• Compactified extra dimension and entanglement island as clues to quantum gravity
• FIMP Dark Matter in bulk viscous non-standard cosmologies