Measurement of the Cosmic-Ray Antiproton to Proton Ratio From 4 to 50 GeV

Details Measurement of the Cosmic-Ray Antiproton to Proton Ratio From 4 to 50 GeV Measurement of the Cosmic-Ray Antiproton to Proton Ratio From 4 to 50 GeV

Apr 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aps..aprh14010c&link_type=abstract

American Physical Society, April Meeting, April 28 - May 1, 2001 Washington, DC Bulletin of the American Physical Society, Vol.

Physics

Scientific paper

We present a measurement of the cosmic-ray Antiproton/Proton ratio as a function of energy using the High-Energy Antimatter Telescope balloon-borne instrument (HEAT). This detector utilizes multiple ionization measurements and a magnet spectrometer to provide particle identification, momentum, and charge sign determination. The data was obtained from a flight of the HEAT detector in the spring of 2000 from Ft. Sumner, NM. Preliminary results for the energy-dependent antiproton fraction will be compared with recent predictions based on the observed abundance of secondary light elements in the cosmic rays.

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