Primordial black holes as all dark matter

Paul H. Frampton, Masahiro Kawasaki, Fuminobu Takahashi, Tsutomu T. Yanagida

Research output: Contribution to journalArticlepeer-review

109 Citations (Scopus)


We argue that a primordial black hole is a natural and unique candidate for all dark matter. We show that, in a smooth-hybrid new double inflation model, a right amount of the primordial black holes, with a sharply-defined mass, can be produced at the end of the smooth-hybrid regime, through preheating. We first consider masses < 10 -7M which are allowed by all the previous constraints. We next discuss much heavier mass 10 5M hinted at by entropy, and galactic size evolution, arguments. Effects on the running of the scalar spectral index are computed.

Original languageEnglish
Article number023
JournalJournal of Cosmology and Astroparticle Physics
Issue number4
Publication statusPublished - 2010 May 3
Externally publishedYes


  • Dark matter theory
  • Inflation
  • Primordial black holes

ASJC Scopus subject areas

  • Astronomy and Astrophysics

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