Evidence for the existence of cosmic-ray antiprotons

Details Evidence for the existence of cosmic-ray antiprotons Evidence for the existence of cosmic-ray antiprotons

Oct 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979phrvl..43.1196g&link_type=abstract

Physical Review Letters, vol. 43, Oct. 15, 1979, p. 1196-1199.

Physics

127

Antiprotons, Cosmic Rays, Interstellar Matter, Particle Production, Balloon Flight, Balloon-Borne Instruments, Data Acquisition, Energetic Particles, Histograms, Spectrometers, Superconducting Magnets

Scientific paper

A search for cosmic-ray antiprotons was recently performed with the use of a balloon-borne superconducting-magnet spectrometer. A total of 46 antiproton candidates were observed in the rigidity interval from 5.6 to 12.5 GV/c. Of these events 18.3 are expected to be atmospheric and instrumentation background. The p(-)/p ratio is found to be 0.00052 + or - 0.00015. This ratio is consistent with secondary production of antiprotons in the interstellar medium.

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