EDP Sciences
Free access
Volume 388, Number 2, June III 2002
Page(s) 676 - 687
Section Physical and chemical processes
DOI http://dx.doi.org/10.1051/0004-6361:20020313

A&A 388, 676-687 (2002)
DOI: 10.1051/0004-6361:20020313

Antiprotons from primordial black holes

A. Barrau1, 2, G. Boudoul1, 2, F. Donato3, D. Maurin3, P. Salati3, 4 and R. Taillet3, 4

1  ISN Grenoble, 53 Av. des Martyrs, 38026 Grenoble Cedex, France
2  Université Joseph Fourier, 38000 Grenoble, France
3  LAPTH, BP 110, 74941 Annecy-le-Vieux, France
4  Université de Savoie, 73011 Chambéry, France

(Received 21 December 2001 / Accepted 28 February 2002)

Primordial black holes (PBHs) have motivated many studies since it was shown that they should evaporate and produce all kinds of particles (Hawking 1974). Recent experimental measurements of cosmic rays with great accuracy, theoretical investigations on the possible formation mechanisms and detailed evaporation processes have revived the interest in such astrophysical objects. This article aims to use the latest developments in antiproton propagation models (Maurin et al. 2001; Donato et al. 2001) together with new data from BESS, CAPRICE and AMS experiments to constrain the local amount of PBH dark matter. Depending on the diffusion halo parameters and on the details of the emission mechanisms, we derive an average upper limit of the order of $\rho_{\odot}^{\rm PBH}\approx 1.7\times10^{-33}$g cm -3.

Key words: ISM: cosmic rays -- black hole physics -- cosmology: dark matter

Offprint request: A. Barrau, barrau@isn.in2p3.fr

© ESO 2002