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Black hole constraints on the running-mass inflation model
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The running-mass inflation model, which has strong motivation from particle physics, predicts density perturbations whose spectral index is strongly scale-dependent. For a large part of parameter space the spectrum rises sharply to short scales. In this paper we compute the production of primordial black holes, using both analytic and numerical calculation of the density perturbation spectra. Observational constraints from black hole production are shown to exclude a large region of otherwise permissible parameter space.
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Cited by 6 Pith papers
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From Primordial Black Holes Abundance to Primordial Curvature Power Spectrum (and back)
Using numerical relativity thresholds, cosmological perturbation theory, and peak theory, the authors derive updated upper limits on the small-scale primordial curvature power spectrum from primordial black hole abund...
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Initial spatial clustering of primordial black holes is irrelevant for binary mergers in the LVK mass range because FIRAS spectral-distortion constraints limit the clustering scale to below the merger-relevant separat...
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Non-Gaussian curvature perturbations, related to Gaussian ones by a logarithmic mapping, can make the scalar-induced gravitational wave background much larger or smaller than the standard quadratic calculation predicts.
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Blue-tilted running spectrum with α_s ≈ 0.02 and β_s ≈ 0.02 resolves JWST early galaxy tension at 1σ in joint CMB analysis.
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Sub-Horizon Amplification of Curvature Perturbations: A New Route to Primordial Black Holes and Gravitational Waves
Any negative value of the second slow-roll parameter can amplify the scalar power spectrum through sub-horizon growth, so the usual ultra-slow-roll requirement of epsilon2 <= -6 is not necessary.
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Primordial Black Holes as Dark Matter: Recent Developments
Primordial black holes in specific mass ranges could account for some or all dark matter while resolving structure-formation and seed problems in standard cosmology.
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