Revisiting the gamma-ray signal from light ALPs emitted during the evaporation of memory-burdened PBHs
Abstract
The memory-burden effect was recently proposed to take into account the information back-reaction in the evaporation of primordial black holes (PBHs). In this work, we systematically explore the axion-like particle (ALP) production via the evaporation of memory-burdened PBHs and the subsequent ALP-photon conversion in cosmic magnetic fields. The PBH evaporation progress is divided in the semiclassical phase of Hawking radiation and the quantum memory-burden phase. The time evolution of PBH mass and the gamma-ray flux after the conversion of PBH-emitted ALP are then evaluated by considering the memory-burden induced PBH entropy suppression. Furthermore, we investigate the detection prospects of this evaporation-conversion signal in next-generation satellite telescopes, including AMEGO, e-ASTROGAM and MAST. The detectable PBH mass range is extended down to masses much smaller than 1015 g. Applying the Fisher forecasting method, we derive the projected sensitivity for PBH fraction fPBH and ALP-photon coupling gaγγ.
Related
- Quantitative infrared absorption imaging of vapor concentration fields during evaporation
- Origin of small-scale evaporation flows deep in the chromosphere during a solar flare
- Micron-sized Extra Dimensions and Primordial Black Holes: Charged, Rotating, and Memory Burdened
- Can the gravitational waves emitted by Eta Carinae be detected?
- Correlated detection of electrons and ions emitted from laser-induced nanoplasmas in doped helium nanodroplets in the single-shot single-cluster regime
BibTeX
@misc{jiang2026revisiting,
title = {{Revisiting the gamma-ray signal from light ALPs emitted during the evaporation of memory-burdened PBHs}},
author = {Cheng-Rui Jiang and Tong Li},
howpublished = {arXiv},
year = {2026},
month = nov,
doi = {10.48550/arxiv.2611.04136},
eprint = {2611.04136},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2611.04136},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Revisiting the gamma-ray signal from light ALPs emitted during the evaporation of memory-burdened PBHs
AU - Cheng-Rui Jiang
AU - Tong Li
PY - 2026
DA - 2026/11/03
PB - arXiv
DO - 10.48550/arxiv.2611.04136
UR - https://arxiv.org/abs/2611.04136
AB - The memory-burden effect was recently proposed to take into account the information back-reaction in the evaporation of primordial black holes (PBHs). In this work, we systematically explore the axion-like particle (ALP) production via the evaporation of memory-burdened PBHs and the subsequent ALP-photon conversion in cosmic magnetic fields. The PBH evaporation progress is divided in the semiclassical phase of Hawking radiation and the quantum memory-burden phase. The time evolution of PBH mass and the gamma-ray flux after the conversion of PBH-emitted ALP are then evaluated by considering the memory-burden induced PBH entropy suppression. Furthermore, we investigate the detection prospects of this evaporation-conversion signal in next-generation satellite telescopes, including AMEGO, e-ASTROGAM and MAST. The detectable PBH mass range is extended down to masses much smaller than 10^15 g. Applying the Fisher forecasting method, we derive the projected sensitivity for PBH fraction f_PBH and ALP-photon coupling g_aγγ.
ER -