Inflation Induced Planck-Size Black Hole Remnants as Dark Matter
Pisin Chen
Stanford Linear Accelerator Center
chen@slac.stanford.edu
Additional authors:
There have been proposals that primordial black remnants (BHRs) are the dark matter (DM), but the idea is somewhat vague. Recently it was argued that the generalized uncertainty principle (GUP) may prevent a black hole from evaporating completely, and as a result there should exist a Planck-sized BHR at the end of its evaporation. Such a BHR can be stable when further protected by supersymmetry. If a sufficient amount of small black holes can be produced in the early universe, then the resultant BHRs can be an interesting candidate for DM. We demonstrate that this is indeed the case in the hybrid inflation model. By assuming BHR as DM, our notion imposes a constraint on the hybrid inflation potential. We show that such a constraint is not so fine-tuned. A comparison of BHR with other popular DM candidates is given, and its possible cosmological observational signatures are discussed.
