Double inflation in supergravity and the primordial black hole formation

2000/02/29 by Toshiyuki Kanazawa, Masahiro Kawasaki, M. Kawasaki +1 · 1 citation
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Galaxies: Formation, Evolution, Phenomena #astro-ph #gr-qc #hep-ph

paper · pdf · doi:10.1016/s0370-2693(00)00499-8

published as Phys.Lett.B482:174-182,2000 · 14 pages, 2 figures (RevTeX file)

openalex publication_date 2000/06/01 · arxiv created 2000/06/05 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We study a double inflation model (a hybrid inflation + a new inflation) in supergravity and discuss the formation of primordial black holes (PBHs) with mass ∼ 10^-20-10⁵M_\odot. We find that in a wide range of parameter space, we obtain PBHs which amount to Ω≃ 1, i.e., PBH dark matter. Also, we find a set of inflation parameters which produces PBHs evaporating now. Those PBHs may be responsible for antiproton fluxes observed by the BESS experiment.

Citations

• A new inflationary universe scenario: A possible solution of the horizon, flatness, homogeneity, isotropy and primordial monopole problems

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• Multiple inflation, cosmic string networks and the string landscape