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New Mass Window for Primordial Black Holes as Dark Matter from Memory Burden Effect
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abstract
The mass ranges allowed for Primordial Black Holes (PBHs) to constitute all of Dark Matter (DM) are broadly constrained. However, these constraints rely on the standard semiclassical approximation which assumes that the evaporation process is self-similar. Quantum effects such as memory burden take the evaporation process out of the semiclassical regime latest by half-decay time. What happens beyond this time is currently not known. However, theoretical evidence based on prototype models indicates that the evaporation slows down thereby extending the lifetime of a black hole. This modifies the mass ranges constrained, in particular, by BBN and CMB spectral distortions. We show that previous constraints are largely relaxed when the PBH lifetime is extended, making it possible for PBHs to constitute all of DM in previously excluded mass ranges. In particular, this is the case for PBHs lighter than $10^9$g which enter the memory burden stage before BBN and are still present today as DM.
Forward citations
Cited by 14 Pith papers
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Coherence and Quantum Stability of Relativistic Superfluid States
A charged scalar condensate is quantum-stable to all perturbative orders when it is described by the interacting vacuum of fluctuations, a non-Gaussian dressed coherent state that is an eigenstate of H minus mu Q.
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Probing Memory-Burdened Primordial Black Holes with High-Energy Neutrinos
For memory-burdened primordial black holes, a log-normal mass function can produce neutrino abundance limits several orders of magnitude stronger than a monochromatic population with the same median mass, with current...
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Black Hole Memory Burden and its Signatures in Gravitational Waves from Mergers
Swift memory burden shifts black-hole quasinormal-mode frequencies by an amount set by the memory-load parameter μ and critical exponent p, with μ able to exceed the progenitor's information content.
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Burdening (or not) gravitational waves in the presence of primordial black holes
A single gravitational wave template combining inflaton and evaporating primordial black hole sources, with and without memory burden, yields new frequency-ratio signatures for testing black hole evaporation.
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The fast, the slow and the merging: probes of evaporating memory burdened PBHs
Diffuse gamma-ray and neutrino data, plus CMB ionization limits, constrain the memory-burden parameters k, q, and delta for primordial black holes and narrow viable dark matter masses to a broad but testable window.
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Probing Memory-Burdened Primordial Black Holes with Galactic Sources observed by LHAASO
LHAASO spectra of four Galactic sources are used to set upper limits on the abundance of memory-burdened primordial black holes lighter than 10^9 g.
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Antinuclei from Primordial Black Holes
AMS-02 antiproton data set the tightest limits yet on Galactic primordial black holes with lognormal mass distributions, and cap the expected antideuteron flux below the reach of upcoming detectors.
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Axion misalignment with memory-burdened PBH
Axion dark matter parameter space shifts dramatically when kinetic misalignment and memory-burdened primordial black hole evaporation are combined.
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Impact of memory-burdened black holes on primordial gravitational waves in light of Pulsar Timing Array
Memory-burdened primordial black holes can explain pulsar timing array data as diluted blue-tilted gravitational waves and leave a testable high-frequency signal.
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Micro Black Hole Dark Matter
Micro black holes could survive as dark matter down to 10^{-5} Planck masses if extra dimensions or many species strengthen the memory-burden suppression of their evaporation.
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Relativistic accretion and burdened primordial black holes
Combining relativistic accretion with memory-burdened evaporation widens the parameter space for primordial black holes as dark matter and changes dark matter and dark radiation emission predictions.
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New bounds on Memory Burdened Primordial Black Holes from Big Bang Nucleosynthesis
Memory-burdened primordial black holes lighter than 10^9 grams are newly constrained by Big Bang nucleosynthesis, with a residual unconstrained window around 1-100 grams for suppression index k=2.
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Asymmetries from a charged memory-burdened PBH
A parameter-space scan shows that very large curvature-current couplings can fit the baryon asymmetry and dark matter abundance, while the electric charge of the black hole plays no role in the mechanism.
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Primordial blackhole formation: Exploring chaotic potential with a sharp step via the GLMS perspective
Using a chaotic inflation potential with a sharp step, the paper computes PBH abundances in four mass windows and finds the GLMS approximation can make PBHs the whole of dark matter in two of them.
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