Galactic antiprotons from photinos

F. W. Stecker, S. Rudaz, T. F. Walsh

Research output: Contribution to journalArticlepeer-review

108 Scopus citations


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=m. 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.

Original languageEnglish (US)
Pages (from-to)2622-2625
Number of pages4
JournalPhysical Review Letters
Issue number23
StatePublished - Jan 1 1985

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