Université de GenèveDépartement de Physique ThéoriqueCAP Genève

The Primordial black hole dark matter - LISA serendipity

29. October 2018
Cite as: 
N. Bartolo, V. De Luca, G. Franciolini, M. Peloso and A. Riotto [arXiv:1810.12218].

The last few years have witnessed a renewed interest in the possibility that primordial black holes (PBHs) constitute the dark matter of the universe. Current observational constraints leave only a few PBH mass ranges for this possibility. One of them is around 10^{-12} M_\odot. If these PBHs are due to enhanced scalar perturbations produced during inflation, their formation is inevitably accompanied by the generation of fully non-Gaussian gravitational waves (GWs) with frequency peaked in the mHz range, precisely at the maximum sensitivity of the LISA mission. We show that, if these primordial black holes are the dark matter, LISA will be able to detect not only the GW power spectrum, but also the non-Gaussian three-point GW correlator, thus allowing this scenario to be thoroughly tested..


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