Curvature perturbation spectra from waterfall transition, black hole constraints and non-Gaussianity

2011/07/31 by É. V. Bugaev, Edgar Bugaev, Peter Klimai · 3 citations
Mathematics · Physics and Astronomy · #Amplitude #Black Holes and Theoretical Physics #Classical mechanics #Cosmology and Gravitation Theories #Curvature #Galaxies: Formation, Evolution, Phenomena #Geometry #Inflation (cosmology) #Mathematics #Non-Gaussianity #Perturbation (astronomy) #Physics #Quantum electrodynamics #Quantum mechanics #Spectral line #astro-ph.CO #hep-ph

paper · pdf · doi:10.1088/1475-7516/2011/11/028

published as JCAP 11 (2011) 028 · v2: 16 pages, 6 figures. Several references and 1 figure added

arxiv created 2011/10/12 · openalex publication_date 2011/11/15 · arxiv updated 2011/11/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We carried out numerical calculations of a contribution of the waterfall field to the primordial curvature perturbation (on uniform density hypersurfaces) ζ, which is produced during waterfall transition in hybrid inflation scenario. The calculation is performed for a broad interval of values of the model parameters. We show that there is a strong growth of amplitudes of the curvature perturbation spectrum in the limit when the bare mass-squared of the waterfall field becomes comparable with the square of Hubble parameter. We show that in this limit the primordial black hole constraints on the curvature perturbations must be taken into account. It is shown that, in the same limit, peak values of the curvature perturbation spectra are far beyond horizon, and the spectra are strongly non-Gaussian.

Citations

• Primordial black hole formation and hybrid inflation
• The effect of non-Gaussian curvature perturbations on the formation of primordial black holes
• Inflation dynamics and reheating
• Non-Gaussian and nonscale-invariant perturbations from tachyonic preheating in hybrid inflation
• Dynamics of phase transition in the new inflationary universe scenario and generation of perturbations
• Large metric perturbations from rescattering
• A General Analytic Formula for the Spectral Index of the Density Perturbations produced during Inflation
• Particle Physics Models of Inflation and the Cosmological Density Perturbation
• More hilltop inflation models
• Non-Gaussianity from tachyonic preheating in hybrid inflation

Cited by

• Formation of primordial black holes from non-Gaussian perturbations produced in a waterfall transition
• Gauge field production in supergravity inflation: Local non-Gaussianity and primordial black holes
• Quantum diffusion during inflation and primordial black holes