The antimatter abundance ratios in the cosmic rays from 5 to 50 GeV

Details The antimatter abundance ratios in the cosmic rays from 5 to 50 GeV The antimatter abundance ratios in the cosmic rays from 5 to 50 GeV

Apr 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aps..oss.b9002n&link_type=abstract

American Physical Society, Ohio Section Spring 2004, April 16-17, 2004, Ohio University, Athens, Ohio, MEETING ID: OSS04, abstra

Physics

Scientific paper

The relative abundance of antimatter to matter in the cosmic rays is an indicator of the propagation history of galactic cosmic rays as well as a window into possible exotic sources of antimatter, such as black hole or neutron star environments or certain dark matter predictions. We have measured the antiproton to proton and positron to electron abundance ratios from 5 to 50 GeV with the HEAT balloon-borne instrument. HEAT utilizes a magnetic spectrometer combined with a dE/dx technique to identify both positive and negative singly charged particles in the cosmic rays. This talk describes gives a brief overview of the HEAT instrument, as well as measurement results and implications.

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