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Axion misalignment with memory-burdened PBH

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arxiv 2501.04076 v2 pith:ATERVKKZ submitted 2025-01-07 hep-ph astro-ph.CO

Disha Bandyopadhyay , Debasish Borah , Nayan Das This is my paper
classification hep-phastro-ph.CO
keywords axionmisalignmenteffectdetectionevaporationexperimentsaccordingapproximation
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We study the possibility of producing axion dark matter (DM) via misalignment mechanisms in a non-standard cosmological era dominated by ultra-light primordial black holes (PBH). While the effect of PBH domination on the production of axion via vacuum misalignment is known assuming the PBH evaporation to proceed according to Hawking's semi-classical (SC) approximation, we go beyond these simplest possibilities to include kinetic misalignment of axion and backreaction effect of emitted particles on the PBH themselves, referred to as the memory-burden (MB) effect. We show that, depending upon the type of misalignment mechanism and PBH evaporation regime, the axion as well as PBH parameter space consistent with the observed DM relic changes significantly having interesting implications for axion detection experiments. PBH also offer complementary detection prospects via gravitational wave due to PBH density fluctuations and excess radiation due to emission of hot axions within reach of future cosmic microwave background experiments.

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Cited by 5 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Black Hole Memory Burden and its Signatures in Gravitational Waves from Mergers

    gr-qc 2026-07 conditional novelty 6.0 of 10

    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.

  2. Memory burden effect of regular primordial black holes

    astro-ph.CO 2026-05 unverdicted novelty 5.0 of 10

    Combining regular black hole metrics with memory burden suppresses evaporation and opens a 10^6-10^8 g PBH mass window that can comprise all dark matter.

  3. Relativistic accretion and burdened primordial black holes

    astro-ph.CO 2025-07 conditional novelty 4.0 of 10

    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.

  4. New bounds on Memory Burdened Primordial Black Holes from Big Bang Nucleosynthesis

    astro-ph.CO 2025-06 reject novelty 4.0 of 10

    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.

  5. WIMP/FIMP dark matter and primordial black holes with memory burden effect

    hep-ph 2025-06 unverdicted novelty 4.0 of 10

    Authors calculate relic abundance of dark matter as sum of thermal WIMP/FIMP production, Hawking radiation from PBHs, and surviving PBHs under memory burden, under conditions where thermal production dominates and PBH...

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