The Interplay between the Dark Matter Axion and Primordial Black Holes

Abstract

If primordial black holes (PBHs) had come to dominate the energy density of the early Universe when oscillations in the axion field began, we show that the relic abundance and expected mass range of the QCD axion would be greatly modified. Since the QCD axion is a potential candidate for dark matter (DM), we refer to it as the DM axion. We predominantly explore PBHs in the mass range $(10^6-5\times 10^8)$g. We investigate the relation between the relic abundance of DM axions and the parameter space of PBHs. We numerically solve the set of Boltzmann equations, that governs the cosmological evolution during both radiation and PBH-dominated epochs, providing the bulk energy content of the early Universe. We further solve the equation of motion of the DM axion field to obtain its present abundance. Alongside non-relativistic production mechanisms, light QCD axions are generated from evaporating PBHs through the Hawking mechanism and could make up a fraction of the dark radiation (DR). If the QCD axion is ever discovered, it will give us insight into the early Universe and probe into the physics of the PBH-dominated era. We estimate the bounds on the model from DR axions produced via PBH evaporation and thermal decoupling, and we account for isocurvature bounds for the period of inflation where the Peccei-Quinn symmetry is broken. We assess the results obtained against the available CMB data and we comment on the forecasts from gravitational wave searches. We briefly state the consequences of PBH accretion and the uncertainties this may further add to cosmology and astroparticle physics modeling.

39 pages, 5 figures, Matches the version published on JCAP

References in corpus (50)

• First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole
• First Sagittarius A* Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole in the Center of the Milky Way
• Laser Interferometer Space Antenna
• Primordial Black Holes as Dark Matter
• Primordial Black Holes as Dark Matter: Recent Developments
• Cosmic microwave background limits on accreting primordial black holes
• CMB-S4 Science Case, Reference Design, and Project Plan
• Primordial black hole dark matter from single field inflation
• Relic neutrino decoupling with flavour oscillations revisited
• Primordial Black Holes and Slow-Roll Violation
• A precision calculation of relic neutrino decoupling
• Dark Matter from Axion Strings with Adaptive Mesh Refinement
• On Effective Degrees of Freedom in the Early Universe
• Microlensing and dynamical constraints on primordial black hole dark matter with an extended mass function
• The dark-matter axion mass
• The effect of a late decaying scalar on the neutralino relic density
• Update of axion CDM energy density
• Isocurvature bounds on axions revisited
• Thermal axion production in the primordial quark-gluon plasma
• Unification of Inflation with Dark Energy in $f(R)$ Gravity and Axion Dark Matter
• Pulsar Timing Probes of Primordial Black Holes and Subhalos
• Signatures of non-gaussianity in the isocurvature modes of primordial black hole dark matter
• $f(R)$ Gravity Inflation with String-Corrected Axion Dark Matter
• Questions on calculation of primordial power spectrum with large spikes: the resonance model case
• Relic gravitational waves from light primordial black holes
• Primordial Black Hole Evaporation and Dark Matter Production: II. Interplay with the Freeze-In/Out Mechanism
• Probing the Early Universe with Axion Physics and Gravitational Waves
• Primordial black hole constraints with Hawking radiation -- a review
• Gravitational waves from dark matter isocurvature
• Axion constraints in non-standard thermal histories
• Axion Dark Matter in the Time of Primordial Black Holes
• Ultra-cold WIMPs: relics of non-standard pre-BBN cosmologies
• Novel cosmological bounds on thermally-produced axion-like particles
• Imprints of the Early Universe on Axion Dark Matter Substructure
• ALP Dark Matter in a Primordial Black Hole Dominated Universe
• GUT-Scale Primordial Black Holes: Mergers and Gravitational Waves
• Formation and Abundance of Late Forming Primordial Black Holes as Dark Matter
• New opportunities for axion dark matter searches in nonstandard cosmological models
• Kinetic decoupling of WIMPs: analytic expressions
• Destruction of axion miniclusters in the Galaxy
• Primordial Black Holes from CDM Isocurvature Perturbations
• The QCD Axion and Gravitational Waves in light of NANOGrav results
• Axion minivoids and implications for direct detection
• Dark Matter Axions in the Early Universe with a Period of Increasing Temperature
• Searches for New Particles, Dark Matter, and Gravitational Waves with SRF Cavities
• Peak statistics for the primordial black hole abundance
• Opening up a window on the postinflationary QCD axion
• Baryogenesis from ultra-slow-roll inflation
• Disruption of Dark Matter Minihaloes in the Milky Way environment: Implications for Axion Miniclusters and Early Matter Domination
• Dark Matter from Evaporating Primordial Black Holes in the Early Universe

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• Primordial regular black holes as all the dark matter. I. Time-radial-symmetric metrics
• The future search for low-frequency axions and new physics with the FLASH resonant cavity experiment at Frascati National Laboratories
• Memory burden effect mimics reheating signatures on SGWB from ultra-low mass PBH domination
• Ultralight Black Holes as Sources of High-Energy Particles
• Light burden of memory: Constraining primordial black holes with high-energy neutrinos
• Formation of hot spots around small primordial black holes
• From WIMPs to FIMPs: Impact of Early Matter Domination
• Detecting Axion-Like Particles with Primordial Black Holes
• Constraining the primordial black hole abundance through Big-Bang nucleosynthesis
• QCD Axion Kinetic Misalignment without Prejudice
• Unitarity Bound on Dark Matter in Low-temperature Reheating Scenarios
• High-energy gamma-ray emission from memory-burdened primordial black holes
• Revisiting signatures of thermal axions in nonstandard cosmologies
• Primordial regular black holes as all the dark matter. III. Covariant canonical quantum gravity models
• Kinetic Axion Dark Matter in String Corrected $f(R)$ Gravity
• On the Galactic radio signal from stimulated decay of axion dark matter
• Gravitational Wave Signatures of Primordial Black Hole Reheating in Upcoming Interferometry Missions
• Accretion, Evaporation and Superradiance Phase Diagram of (Primordial) Black Holes and $10^{-21}-10^{21}$ eV Scalar, Vector, Tensor Fields
• Axion Dark Matter Archaeology with Primordial Gravitational Waves
• Microscopic primordial black holes as macroscopic dark matter from large extra dimensions