Primordial Black Holes as a Factory of Axions: Extragalactic Photons from Axions
arXiv:2212.11977 · doi:10.1093/ptep/ptag011
Abstract
Primordial black holes (PBHs) are significant sources of axions and axion-like particles (ALPs), provided their Hawking temperature exceeds the particles' masses. Given the predominant decay of axions into photons, the enhanced photon spectrum they generate can be feasibly detected using sensitive detectors. This paper introduces a novel methodology that elucidates the decay process for particles to traverse and decay over cosmological timescales. Specifically, we derive estimations for the photon spectrum and flux, assuming a monochromatic mass spectrum and isotropic distribution for PBHs. Encouragingly, forthcoming detectors like e-ASTROGAM are well positioned to capture this signal.
13 pages, 7 figures; title changed, updated figures
References in corpus (16)
- Primordial Black Holes as Dark Matter
- Revisiting the bound on axion-photon coupling from Globular Clusters
- Higgs inflation still alive
- Recent Progress in the Physics of Axions and Axion-Like Particles
- Higgs inflation from Standard Model criticality
- Black Hole Metamorphosis and Stabilization by Memory Burden
- Rotating Black Holes at Future Colliders. III. Determination of Black Hole Evolution
- Black hole induced spins from hyperbolic encounters in dense clusters
- Spins of primordial black holes formed in the radiation-dominated phase of the universe: first-order effect
- Axion-like particles from primordial black holes shining through the Universe
- Cluster X-ray line at from axion-like dark matter
- Signatures of primordial black hole dark matter at DUNE and THEIA
- Spin of primordial black holes in the model with collapsing domain walls
- Axion Quality Problem Alleviated by Non-Minimal Coupling to Gravity
- Axion-like particles from primordial black hole evaporation and their detection in neutrino experiments
- Primordial black holes induced stochastic axion-photon oscillations in primordial magnetic field