Secondary antiproton production in relativistic plasmas

Details Secondary antiproton production in relativistic plasmas Secondary antiproton production in relativistic plasmas

Jan 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986natur.319..205d&link_type=abstract

Nature (ISSN 0028-0836), vol. 319, Jan. 16, 1986, p. 205, 206. Previously announced in STAR as N86-11141.

Computer Science

8

Bremsstrahlung, Emission Spectra, Gamma Ray Spectra, Relativistic Electron Beams, Solar Flares, Angular Distribution, Anisotropy, Limb Brightening

Scientific paper

Recent measurements of the low-energy flux of antiprotons (p) in cosmic rays give ratios of p/p which are greater by a factor of 3 - 5 than predicted by the simple "leaky box" model of cosmic-ray propagation. The authors report on an investigation of the possibility that the low-energy p excess reflects an origin in p-p collisions in relativistic plasmas. Because of both target and projectile motion in such plasmas, the antiproton production threshold in the frame of the plasma is much lower than the threshold of antiproton production in cosmic ray interactions with ambient matter. The spectrum of the resultant antiprotons therefore extends to much lower energy than in the cosmic ray case. Sites at which matter is accreted by compact objects could be sources of the low energy antiprotons.

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