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Double inflation in supergravity and the primordial black hole formation

Toshiyuki Kanazawa·M. Kawasaki·T. Yanagida
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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 \sim 10^{-20}-10^{5}M_{\odot}. We find that in a wide range of parameter space, we obtain PBHs which amount to Ω\simeq 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.

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Toshiyuki Kanazawa, M. Kawasaki, T. Yanagida. 2000-06-05. Double inflation in supergravity and the primordial black hole formation. https://doi.org/10.1016/s0370-2693(00)00499-8

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