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Updated: Nov 17, 2025

Setting Limits on Supersymmetry Using Simplified Models
Published on: November 15, 2013
NANOGrav Data Hints at Primordial Black Holes as Dark Matter
V De Luca1, G Franciolini1, A Riotto1,2
1Département de Physique Théorique and Centre for Astroparticle Physics (CAP), Université de Genève, 24 quai Ernest Ansermet, CH-1211 Geneva, Switzerland.
Abstract:
The NANOGrav Collaboration has recently published strong evidence for a stochastic common-spectrum process that may be interpreted as a stochastic gravitational wave background. We show that such a signal can be explained by second-order gravitational waves produced during the formation of primordial black holes from the collapse of sizeable scalar perturbations generated during inflation. This possibility has two predictions: (i) the primordial black holes may comprise the totality of the dark matter with the dominant contribution to their mass function falling in the range (10^{-15}÷10^{-11})M_{⊙} and (ii) the gravitational wave stochastic background will be seen as well by the Laser Interferometer Space Antenna experiment.
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