# Accurate results for primordial black holes from spectra with a distinguished scale

@article{Blais2003AccurateRF,
title={Accurate results for primordial black holes from spectra with a distinguished scale},
author={David Blais and Torsten Bringmann and Claus Kiefer and David Polarski},
journal={Physical Review D},
year={2003},
volume={67},
pages={024024}
}
• Published 16 June 2002
• Physics
• Physical Review D
We perform an accurate computation of the production rate for primordial black holes (PBHs). The reason is that the underlying mass variance had been overestimated systematically, as was shown recently. For scale-free power law primordial spectra, and for a universe with critical density, the mass variance is less than 34% of its value thought earlier for the spectral index in the range $1l~nl~1.3.$ We then extend our study to spectra with a characteristic scale and find the accurate shape of…

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