1210.3262 (P. A. Klimai et al.)

Primordial black hole formation from non-Gaussian curvature perturbations    [PDF]

P. A. Klimai, E. V. Bugaev

We consider several early Universe models that allow for production of large curvature perturbations at small scales. As is well known, such perturbations can lead to production of primordial black holes (PBHs). We briefly review the Gaussian case and then focus on two models which produce strongly non-Gaussian perturbations: hybrid inflation waterfall model and the curvaton model. We show that limits on the values of curvature perturbation power spectrum amplitude are strongly dependent on the shape of perturbations and can significantly (by two orders of magnitude) deviate from the usual Gaussian limit of ${\cal P}_\zeta \lesssim 10^{-2}$. We give examples of PBH mass spectra calculations for each case.

View original: http://arxiv.org/abs/1210.3262