Bulk Black Hole Dark Matter

Abstract

The dark dimension provides a mechanism to resolve the cosmological hierarchy problem and assembles a colosseum for dark matter contenders. In a series of recent publications we investigated whether primordial black holes (PBHs) perceiving the dark dimension could constitute all of the dark matter in the universe. A key assumption of these investigations is that PBHs remain confined to the brane during the entire evaporation process. As a consequence, the abundance of PBHs evaporating at the present epoch is severely constrained by observations of both the extragalactic and Galactic $\gamma$-ray backgrounds. As a natural outgrowth of these investigations, herein we relax the assumption of brane localized PBHs and reexamine the evaporation process of PBHs which are allowed to escape into the dark dimension. We show that the escape of PBHs from the brane is almost instantaneous. Armed with this pivotal finding we reassess the allowed mass range of PBHs to assemble all cosmological dark matter, which is estimated to be $10^{11}\lesssim M_{\mathrm{BH}}/\mathrm{g}\lesssim 10^{21}$.

Matching journal version

References in corpus (35)

• On the Geometry of the String Landscape and the Swampland
• The Swampland: Introduction and Review
• Primordial Black Holes as Dark Matter: Recent Developments
• The String Landscape and the Swampland
• Black Hole Bound on the Number of Species and Quantum Gravity at LHC
• Inflation and Primordial Black Holes
• The Dark Dimension and the Swampland
• Constraining Primordial Black Hole Formation from Single-Field Inflation
• No-go for the formation of heavy mass Primordial Black Holes in Single Field Inflation
• Squeezed bispectrum and one-loop corrections in transient constant-roll inflation
• Graviton Emission in the Bulk from a Higher-Dimensional Schwarzschild Black Hole
• Note on the bispectrum and one-loop corrections in single-field inflation with primordial black hole formation
• The Primordial Black Hole Formation from Single-Field Inflation is Not Ruled Out
• Aspects of the Dark Dimension in Cosmology
• The Primordial Black Hole Formation from Single-Field Inflation is Still Not Ruled Out
• Probing modified Hawking evaporation with gravitational waves from the primordial black hole dominated universe
• Emergence of Species Scale Black Hole Horizons
• Minimal Black Holes and Species Thermodynamics
• Shedding black hole light on the emergent string conjecture
• The Dark Dimension in a Warped Throat
• Lectures on the string landscape and the Swampland
• Anti-de Sitter $\to$ de Sitter transition driven by Casimir forces and mitigating tensions in cosmological parameters
• From infinite to infinitesimal: Using the Universe as a dataset to probe Casimir corrections to the vacuum energy from fields inhabiting the dark dimension
• Comparing sharp and smooth transitions of the second slow-roll parameter in single-field inflation
• Fuzzy Dark Matter and the Dark Dimension
• Large extra dimensions from higher-dimensional inflation
• The dark dimension, the Swampland, and the origin of cosmic rays beyond the GZK barrier
• Critical escape velocity of black holes from branes
• Probing the Dark Dimension with Auger data
• On the Species Scale, Modular Invariance and the Gravitational EFT expansion
• The Tale of Three Scales: the Planck, the Species, and the Black Hole Scales
• Swamplandish Unification of the Dark Sector
• Density of States, Black Holes and the Emergent String Conjecture
• Monochromatic Mass Spectrum of Primordial Black Holes
• Loop Corrections in Bispectrum in USR Inflation with PBHs Formation

Cited by in corpus (6)

• Primordial regular black holes as all the dark matter. II. Non-time-radial-symmetric and loop quantum gravity-inspired metrics
• Primordial regular black holes as all the dark matter. I. Time-radial-symmetric metrics
• Two Micron-Size Dark Dimensions
• Primordial regular black holes as all the dark matter. III. Covariant canonical quantum gravity models
• Hitchhiker's Guide to the Swampland: The Cosmologist's Handbook to the string-theoretical Swampland Programme
• Breaking Free from the Swampland of Impossible Universes through the DESI Portal