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Evidence for the existence of cosmic-ray antiprotonsA 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.
Document ID
19790069112
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
doi:10.1103/PhysRevLett.43.1196
Authors
Golden, R. L. (New Mexico State Univ. Las Cruces, NM, United States)
Horan, S. (New Mexico State Univ. Las Cruces, NM, United States)
Mauger, B. G. (New Mexico State University Las Cruces, N. Mex., United States)
Badhwar, G. D. (New Mexico State Univ. Las Cruces, NM, United States)
Lacy, J. L. (New Mexico State Univ. Las Cruces, NM, United States)
Stephens, S. A. (New Mexico State Univ. Las Cruces, NM, United States)
Daniel, R. R. (New Mexico State Univ. Las Cruces, NM, United States)
Zipse, J. E. (NASA Johnson Space Center Houston, Tex., United States)
Date Acquired
August 9, 2013
Publication Date
October 15, 1979
Publication Information
Publication: Physical Review Letters
Volume: 43
Subject Category
Space Radiation
Accession Number
79A53125
Funding Number(s)
CONTRACT_GRANT: NAS9-15560
Distribution Limits
Public
Copyright
Other

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