Local flux of low-energy antiprotons from evaporating primordial black holes

K. Maki, T. Mitsui, S. Orito

Research output: Contribution to journalArticlepeer-review

92 Citations (Scopus)

Abstract

We investigate low-energy cosmic-ray antiprotons (p¯’s) arising from the fragmentation of quarks and gluons emitted from evaporating primordial black holes (PBHs). To calculate the local interstellar flux of these p¯’s, their propagation in the Galaxy is described by a 3D Monte Carlo simulation based on the diffusion model. This flux is used with recent observations to derive new upper limits on (i) the local PBH explosion rate R < 1.7 × 10−2pc−3yr−1,(ii) the fraction of the Universe’s mass going into PBHs with particular mass, and (iii) the average density of PBHs in the Universe.

Original languageEnglish
Pages (from-to)3474-3477
Number of pages4
JournalPhysical review letters
Volume76
Issue number19
DOIs
Publication statusPublished - 1996 May 6
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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