Measurement of the Cosmic-Ray Antiproton to Proton Abundance Ratio between 4 and 50 GeV with HEAT-pbar.

Details Measurement of the Cosmic-Ray Antiproton to Proton Abundance Ratio between 4 and 50 GeV with HEAT-pbar. Measurement of the Cosmic-Ray Antiproton to Proton Abundance Ratio between 4 and 50 GeV with HEAT-pbar.

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..aprb17032s&link_type=abstract

American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As

Astronomy and Astrophysics

Astrophysics

Scientific paper

The HEAT-pbar experiment, a balloon-borne magnet spectrometer with precise rigidity and multiple energy loss measurement has performed a measurement of the antiproton to proton abundance ratio at energies between 4 and 50 GeV. Reliable particle identification was achieved up to the highest observed proton energy of 81 GeV. The data agree well with a standard model of secondary production of antiprotons in the Galaxy. We will compare our results with recent predictions based on the observed abundance of secondary light elements in the cosmic rays and discuss the implication of our measurement on the production of the diffuse galactic gamma-ray emission.

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