The Secondary Cosmic-Ray Antiproton Spectrum

Details The Secondary Cosmic-Ray Antiproton Spectrum The Secondary Cosmic-Ray Antiproton Spectrum

Apr 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aps..aprh14011s&link_type=abstract

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

Astronomy and Astrophysics

Astrophysics

Scientific paper

The production rate of antiprotons in cosmic-ray interactions depends on physical and astrophysical parameters which are yet not well understood. Although p + p → bar p + X cross sections, for example, are fairly accurately known, the corresponding energy degrading differential cross section, fracdσdE, for bar p + X → bar p + X' is still uncertain. Moreover, the production rate depends on the spectrum and composition of primary cosmic rays as well as their path lengths and propagation model. In this talk we will present our calculation of the antiproton spectrum with different possible input parameters and propagation models and discuss bounds from which evidence of exotic sources may be inferred.

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