Micron-sized Extra Dimensions and Primordial Black Holes: Charged, Rotating, and Memory Burdened
Abstract
We explore the possibility of explaining dark matter through six-dimensional (6D) primordial black holes (PBHs) in a theory with two extra dimensions. Interestingly, in this scenario the fundamental energy scale is of the order of ∼ 10 TeV, accessible by future experiments. We analyse the viability of charged and rotating 6D black holes under standard Hawking evaporation as well as the memory burden scenario. In the case of pure Hawking evaporation, only PBHs with masses M > 108 g survive to present, while the lifetime of near-extremal configurations is extended by a factor 1/β1/2, where the parameter β characterizes small deviations from extremality. In the memory burden scenario evaporation is enormously suppressed, and sub-gram mass PBHs can survive to the present epoch. At future colliders such as the Future Circular Collider, these micro black holes produce characteristic high multiplicity events, ⟨ N ⟩ ∼ 21, with thermal spectra, enabling direct probes of the fundamental scale and the number of extra dimensions. We find that the memory burden mechanism opens a broad new mass window for light PBH dark matter, while the Kaluza-Klein mass splitting Δm aligns with the atmospheric neutrino scale, √(Δm2atm) suggesting a unified framework between Swampland constraints, cosmology, collider physics, and low energy phenomenology.
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BibTeX
@misc{leontaris2026micronsized,
title = {{Micron-sized Extra Dimensions and Primordial Black Holes: Charged, Rotating, and Memory Burdened}},
author = {George K. Leontaris and George Prampromis},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2605.00252},
eprint = {2605.00252},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2605.00252},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Micron-sized Extra Dimensions and Primordial Black Holes: Charged, Rotating, and Memory Burdened
AU - George K. Leontaris
AU - George Prampromis
PY - 2026
DA - 2026/09/08
PB - arXiv
DO - 10.48550/arxiv.2605.00252
UR - https://arxiv.org/abs/2605.00252
AB - We explore the possibility of explaining dark matter through six-dimensional (6D) primordial black holes (PBHs) in a theory with two extra dimensions. Interestingly, in this scenario the fundamental energy scale is of the order of ∼ 10 TeV, accessible by future experiments. We analyse the viability of charged and rotating 6D black holes under standard Hawking evaporation as well as the memory burden scenario. In the case of pure Hawking evaporation, only PBHs with masses M > 10^8 g survive to present, while the lifetime of near-extremal configurations is extended by a factor 1/β^1/2, where the parameter β characterizes small deviations from extremality. In the memory burden scenario evaporation is enormously suppressed, and sub-gram mass PBHs can survive to the present epoch. At future colliders such as the Future Circular Collider, these micro black holes produce characteristic high multiplicity events, ⟨ N ⟩ ∼ 21, with thermal spectra, enabling direct probes of the fundamental scale and the number of extra dimensions. We find that the memory burden mechanism opens a broad new mass window for light PBH dark matter, while the Kaluza-Klein mass splitting Δm aligns with the atmospheric neutrino scale, √(Δm^2_atm) suggesting a unified framework between Swampland constraints, cosmology, collider physics, and low energy phenomenology.
ER -