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Primordial black holes from the perturbations in the inflaton potential in peak theory

Wang, Qing ; Liu, Yi-Chen ; Su, Bing-Yu ; Li, Nan

Physical review. D, 2021-10, Vol.104 (8), p.1, Article 083546 [Periódico revisado por pares]

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Título:
Primordial black holes from the perturbations in the inflaton potential in peak theory
Autor: Wang, Qing ; Liu, Yi-Chen ; Su, Bing-Yu ; Li, Nan
Assuntos: Approximation ; Black holes ; Dark matter ; Mathematical analysis ; Perturbation
É parte de: Physical review. D, 2021-10, Vol.104 (8), p.1, Article 083546
Descrição: 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 f ~ 0.1 can be achieved in one or two typical mass windows at 10−17 M⊙, 10−13 M⊙, and 30 M⊙, 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.
Editor: College Park: American Physical Society
Idioma: Inglês

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