Neutron oscillation as a source of excess sub-GeV antiprotons in galactic cosmic rays

Details Neutron oscillation as a source of excess sub-GeV antiprotons in galactic cosmic rays Neutron oscillation as a source of excess sub-GeV antiprotons in galactic cosmic rays

Sep 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982natur.299..427s&link_type=abstract

Nature, vol. 299, Sept. 30, 1982, p. 427, 428.

Astronomy and Astrophysics

Astrophysics

11

Antiprotons, Cosmic Rays, Neutrons, Particle Energy, Particle Production, Oscillations, Pair Production, Particle Collisions

Scientific paper

It is noted that the recent detection of an antiproton/proton ratio at energies much less than 1 GeV is several orders of magnitude above that predicted for antiproton production from primary cosmic-ray collisions. The various mechanisms that have been suggested to explain this sub-GeV (130-320 MeV) antiproton excess are seen as having inherent difficulties, such as the imposition of severe constraints on the sources to suppress excessive gamma-ray production. It is postulated that the phenomenon of neutron-antineutron oscillations as a signature of grand unified theories may operate in neutron-rich astrophysical sources, such as supernovae, to produce the required low-energy galactic antiproton background.

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