Physics – Nuclear Physics
Scientific paper
Jan 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999nuphs..70..492s&link_type=abstract
Nuclear Physics B - Proceedings Supplements, vol. 70, issue 1-3, pp. 492-494
Physics
Nuclear Physics
1
Antimatter: Cosmic Rays, Antimatter: Galaxy
Scientific paper
The discovery of a single anti-helium nucleus in the cosmic ray flux would definitely point toward the existence of stars and even of entire galaxies made of anti-matter. The presence of anti-nuclei in cosmic rays has actually profound implications on the fundamental question of the baryon asymmetry of the universe. It is therefore crucial to determine the amount of anti-matter which the Galaxy already produces through the spallation of high-energy protons on the interstellar gas of the Galactic disk. The authors have used a coalescence model to assess the amount of anti-deuterium and anti-helium 3H¯ē present in cosmic rays together with anti-protons.They find that the D¯/p ratio exceeds 10-9 above a momentum per anti-nucleon of ≡4 GeV/c.
Chardonnet Pascal
Orloff Jean
Salati Pierre
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