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Energy dependence of the P(bar)/P ratio in cosmic raysThe antiproton/proton /P(bar)/P/ratio is presented for seven kinetic energy intervals from 4.4 - 13.4 GeV. The P(bar) were observed in 1979 by the New Mexico State University balloon-borne magnet spectrometer. The observations are compared to various models including secondary production in a leaky box. A decline in the P(bar)/P ratio at low energies is expected if the P(bar) are produced as secondaries. The data are consistent with such a decline but the P(bar)/P ratio is much higher than expected. The confidence level is less than 0.0001 for a model based on a leaky box with a mean-matter-traversed lambda of 7 gm/sq cm. The best leaky-box-model fit obtained by varying lambda gives a confidence level of 0.12 for lambda l= 21 + or - 3 gm/sq c. Results are also presented for fits based on the closed-galaxy and other models.
Document ID
19850053927
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Golden, R. L.
(New Mexico State Univ. Las Cruces, NM, United States)
Mauger, B. G.
(New Mexico State Univ. Las Cruces, NM, United States)
Nunn, S.
(New Mexico State Univ. Las Cruces, NM, United States)
Horan, S.
(New Mexico State University Las Cruces, NM, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1984
Publication Information
Publication: Astrophysical Letters
Volume: 24
Issue: 2 19
ISSN: 0004-6388
Subject Category
Space Radiation
Accession Number
85A36078
Funding Number(s)
CONTRACT_GRANT: NAGW-110
Distribution Limits
Public
Copyright
Other

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