Local Flux of Low-Energy Antiprotons from Evaporating Primordial Black Holes

Details Local Flux of Low-Energy Antiprotons from Evaporating Primordial Black Holes Local Flux of Low-Energy Antiprotons from Evaporating Primordial Black Holes

1996-01-08

arxiv.org/abs/astro-ph/9601025v1

Phys.Rev.Lett. 76 (1996) 3474-3477

Astronomy and Astrophysics

Astrophysics

10 pages, 2 PostScript figures

Scientific paper

10.1103/PhysRevLett.76.3474

We investigate low-energy cosmic-ray antiprotons ($\bar{p}$'s) arising from the fragmentation of quarks and gluons emitted from evaporating primordial black holes (PBHs). To calculate the local interstellar flux of these $\bar{p}$'s, their propagation in the Galaxy is described by a 3-D 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 ${\cal R}<1.7\times10^{-2}$ pc$^{-3}$yr$^{-1}$, (ii) the fraction of the Universe's mass going into PBHs with particular mass, and (iii) the average density of PBHs in the Universe.

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