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- W4285341728 abstract "The primordial black hole (PBH) is an effective candidate for dark matter. In this work, the PBH abundance $f$ is calculated in peak theory, with one or two perturbations in the inflaton potential. We construct an antisymmetric perturbation that can create a perfect plateau in the inflaton potential, leading inflation to the ultraslow-roll stage. During this stage, the power spectrum of primordial curvature perturbation is remarkably enhanced on small scales, generating abundant PBHs. The PBH abundance $fensuremath{sim}0.1$ can be achieved in one or two typical mass windows at ${10}^{ensuremath{-}17}text{ }text{ }{M}_{ensuremath{bigodot}}$, ${10}^{ensuremath{-}13}text{ }text{ }{M}_{ensuremath{bigodot}}$, and $30text{ }text{ }{M}_{ensuremath{bigodot}}$, without spoiling the nearly scale-invariant power spectrum on large scales. For comparison, $f$ is calculated in two approximate methods of peak theory (with different spectral moments) and also in the Press-Schechter theory. It is found that the Press-Schechter theory systematically underestimates $f$ by 2 or 3 orders of magnitude compared with peak theory." @default.
- W4285341728 created "2022-07-14" @default.
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- W4285341728 date "2021-10-27" @default.
- W4285341728 modified "2023-10-17" @default.
- W4285341728 title "Primordial black holes from the perturbations in the inflaton potential in peak theory" @default.
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- W4285341728 doi "https://doi.org/10.1103/physrevd.104.083546" @default.
- W4285341728 hasPublicationYear "2021" @default.
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