Accepted Paper

Closing the mass window for stupendously large black holes

Christopher Gerlach, Yann Gouttenoire, Antonio J. Iovino, and Nicholas Leister

Phys. Rev. Lett. - Accepted 9 September, 2026

DOI: https://doi.org/10.1103/qlf9-thf4

Abstract

We show that primordial black holes (PBHs) in the mass range ( $M ≳ 10^{11} M_{⊙}$ ) produce isocurvature perturbations exceeding current Cosmic Microwave Background limits, thereby excluding them as a significant dark matter component.

If the author has provided any supplemental materials with this article they will be available upon publication of the version of record.

Physical Review Letters

Closing the mass window for stupendously large black holes

Abstract

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