Recent observations of cosmic ray antiprotons and a critical assessment of the theories of their origin

Details Recent observations of cosmic ray antiprotons and a critical assessment of the theories of their origin Recent observations of cosmic ray antiprotons and a critical assessment of the theories of their origin

Aug 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...202....1s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 202, no. 1-2, Aug. 1988, p. 1-7.

Astronomy and Astrophysics

Astronomy

7

Antiprotons, Astronomical Models, Cosmic Rays, Milky Way Galaxy, Black Holes (Astronomy), Dark Matter, Energy Spectra, Solar Wind

Scientific paper

The models proposed to explain the observed spectrum of cosmic ray antiprotons are reexamined in light of recent results from balloon-borne experiments. It is found that the prediction of modified closed galaxy model fits the observed data very well. Models in which secondary antiprotons are produced in the sources, could be made consistent with the data provided the secondary particles do not suffer considerable adiabatic deceleration. It has been shown that there cannot be any significant contribution to the observed antiprotons, from the evaporation of mini black holes or from the annihilation of dark matter like photinos. The role of extragalactic cosmic rays has been examined critically in the context of the recent data, and they are not the source of cosmic ray antiprotons. However, determination of the energy spectrum of antiprotons at least up to a few tens of GeV would be valuable to provide information on the possible existence of supersymmetric particles and on the modulation of extragalactic cosmic rays while entering the Galaxy.

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