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Dark matter (DM) interacting only gravitationally with the standard modelcould have been produced in the early universe by Hawking evaporation ofprimordial black holes (PBH). This mechanism is viable in a large range of DMmass, spanning up to the Planck scale. However, DM is also unavoidably producedby the irreducible UV gravitational freeze-in. We show that the lattermechanism sets strong bounds, excluding large regions of the parameter spacefavored by PBH production.

Gravitational dark matter production: primordial black holes and UV freeze-in