Physics
Scientific paper
Aug 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999icrc....4..207c&link_type=abstract
Proceedings of the 26th International Cosmic Ray Conference. August 17-25, 1999. Salt Lake City, Utah, USA. Under the auspices o
Physics
Scientific paper
Various light antinuclei have been detected in accelerator experiments but remain unobserved in the primary cosmic radiation. The production of light antinuclei by antihelium interactions with ambient matter in the intergalactic space is calculated under the hypothesis of a complete symmetry in the physical processes taking place in matter and antimatter conglomerates. The fragmentation of primary antihelium in the intergalactic and interstellar space generates antideuterons and antiprotons with abundances comparable with those of primary antiprotons and antideuterons postulated to be emanated from antimatter conglomerates. At low energy, presumably below 50 GeV, the antinuclei flux reaching the boundary of the solar cavity is attenuated by the galactic wind, the ionization energy losses and the shielding of the regular magnetic fields. A simple consequence of this abundant antiproton production is that the antiproton-to-proton flux ratio in the Galaxy for energies exceeding 100 GeV may be significantly higher than the value of 10,3 measured at 10 GeV.
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