Distinctive positron feature from particle dark-matter annihilations in the galactic halo

Details Distinctive positron feature from particle dark-matter annihilations in the galactic halo Distinctive positron feature from particle dark-matter annihilations in the galactic halo

Mar 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991phrvd..43.1774k&link_type=abstract

Physical Review D (Particles and Fields), Volume 43, Issue 6, 15 March 1991, pp.1774-1780

Astronomy and Astrophysics

Astrophysics

119

Scientific paper

If the dark matter in our galactic halo consists of weakly interacting massive particles (WIMP's) heavier than the W+/- boson which have a significant annihilation branch into W+/- and Z0 pairs, e.g., a Higgsino-like neutralino, a very distinctive feature in the cosmic-ray positron spectrum arises from W+ and Z0 decays. Because of inherent astrophysical uncertainties such a signal is by no means guaranteed even if heavy WIMP's do comprise the galactic halo. However, the positron signature is virtually a ``smoking gun'' for particle dark matter in the halo and thus worthy of note.

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