New measurement of the cosmic-ray positron fraction from 5 to 15 GeV

J. J. Beatty, A. Bhattacharyya, C. Bower, S. Coutu, M. A. Duvernois, S. McKee, S. A. Minnick, D. Müller, J. Musser, S. Nutter, A. W. Labrador, M. Schubnell, S. Swordy, G. Tarlé, A. Tomasch

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Abstract

A new measurement of the cosmic-ray positron fraction at energies between 5 and 15 Gev was performed. The combined data from the three HEAT flights indicate a small positron flux of nonstandard origin above 5 GeV. A new version of the HEAT instrument, HEAT-polar was also designed to observe the high-energy cosmic-ray anti-proton flux. It is observed that a primary contribution to the positron intensity above a few GeV can still not be ruled out.

Original languageEnglish (US)
Article number241102
JournalPhysical Review Letters
Volume93
Issue number24
DOIs
StatePublished - Dec 10 2004

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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    Beatty, J. J., Bhattacharyya, A., Bower, C., Coutu, S., Duvernois, M. A., McKee, S., Minnick, S. A., Müller, D., Musser, J., Nutter, S., Labrador, A. W., Schubnell, M., Swordy, S., Tarlé, G., & Tomasch, A. (2004). New measurement of the cosmic-ray positron fraction from 5 to 15 GeV. Physical Review Letters, 93(24), [241102]. https://doi.org/10.1103/PhysRevLett.93.241102