Peer-reviewedCC BY-NC-ND 4.0Phys.Rev.Lett.
Reduced Gravitational Wave Signal Reopens the Ultralight Primordial Black Hole Window
Abstract
The hot big bang may have emerged from evaporation of primordial black holes (PBHs) lighter than 10 9 g . Standard monochromatic treatments predict nearly simultaneous evaporation, abrupt reheating, and a large poltergeist scalar-induced gravitational wave signal. We confront this expectation with the irreducible collapse mass tail predicted by general relativity, d f PBH / d ln M ∝ M 3.78 , which smooths reheating, suppresses the signal by orders of magnitude, and reopens the ultralight PBH window.
Versions
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BibTeX
@article{gouttenoire2026reduced,
title = {{Reduced Gravitational Wave Signal Reopens the Ultralight Primordial Black Hole Window}},
author = {Yann Gouttenoire and Nicholas Leister and Pedro Schwaller},
journal = {Phys.Rev.Lett.},
year = {2026},
month = nov,
doi = {10.1103/bgv1-lpq7},
eprint = {2605.21477},
archivePrefix = {arXiv},
url = {https://hal.science/hal-05849711v1},
note = {CC BY-NC-ND 4.0},
}
RIS
TY - JOUR
TI - Reduced Gravitational Wave Signal Reopens the Ultralight Primordial Black Hole Window
AU - Yann Gouttenoire
AU - Nicholas Leister
AU - Pedro Schwaller
PY - 2026
DA - 2026/11/02
JO - Phys.Rev.Lett.
DO - 10.1103/bgv1-lpq7
UR - https://hal.science/hal-05849711v1
AB - The hot big bang may have emerged from evaporation of primordial black holes (PBHs) lighter than 10 9 g . Standard monochromatic treatments predict nearly simultaneous evaporation, abrupt reheating, and a large poltergeist scalar-induced gravitational wave signal. We confront this expectation with the irreducible collapse mass tail predicted by general relativity, d f PBH / d ln M ∝ M 3.78 , which smooths reheating, suppresses the signal by orders of magnitude, and reopens the ultralight PBH window.
ER -