New Limit on the Low-Energy Antiproton/Proton Ratio in the Galactic Cosmic Radiation
- 11 July 1988
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 61 (2) , 145-148
Abstract
We describe the results of a balloon-borne apparatus searching for low-energy antiprotons in the Galactic cosmic rays. For energies less than 640 MeV at the top of the atmosphere, no cosmic-ray antiprotons were observed. This yields an upper limit to the ratio of 4.6× at the 85% confidence level.
Keywords
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