Primordial Black Holes in the Excursion Set Theory
arXiv:2101.07812 · doi:10.1093/mnras/stab1403
Abstract
We study primordial black holes (PBHs) formation in the excursion set theory (EST) in a vast range of PBHs masses with and without confirmed constraints on their abundance. In this work, we introduce a new concept of the first touch in the context of EST for PBHs formation. This new framework takes into account the earlier horizon reentry of smaller masses. Our study shows that in the EST, it is possible to produce PBHs in different mass range, with enhanced power spectrum, which could make up all dark matter. We also show that in a broad blue-tilted power spectrum, the production of PBHs is dominated by smaller masses. Our analysis put an upper limit 0.1 on the amplitude of the curvature power spectrum at length scales relevant for PBHs formation.
arXiv comment17 pages, 5 figures, 1 table, accepted for publication in MNRAS
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