Galactic antiprotons from photinos

Details Galactic antiprotons from photinos Galactic antiprotons from photinos

Dec 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985phrvl..55.2622s&link_type=abstract

Physical Review Letters (ISSN 0031-9007), vol. 55, Dec. 2, 1985, p. 2622-2625. Research supported by the University of Minnesota

Astronomy and Astrophysics

Astrophysics

96

Antiprotons, Cosmology, Galactic Structure, Missing Mass (Astrophysics), Cosmic Rays, Elementary Particles, Galactic Halos, Photons

Scientific paper

Stable photinos, the photino being the supersymmetry partner of the photon, can explain both the "missing mass" in galactic halos and the cosmic-ray antiproton spectrum up to the highest energies observed so far. This requires a photino mass around 15 GeV; significantly higher masses are cosmologically disfavored. As a consequence, the observed cosmic-ray antiproton-to-proton ratio is predicted to decrease abruptly just above the measured energy range, at E = mχ. If observed, this striking effect would strongly support the hypothesis that photinos make up the missing matter in our galaxy and also lead to a measurement of the photino mass from cosmic-ray data.

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