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

Kamionkowski, Marc and Turner, Michael S. (1991) Distinctive positron feature from particle dark-matter annihilations in the galatic halo. Physical Review D, 43 (6). pp. 1774-1780. ISSN 0556-2821. http://resolver.caltech.edu/CaltechAUTHORS:KAMprd91a

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Abstract

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.


Item Type:Article
Additional Information:©1991 The American Physical Society Received 26 November 1990 This work was supported in part bu the DOE (at Chicago and at Fermilab), and by NASA (Grant No. NAGW-1340 at Fermilab). MPK would like to thank the NASA Graduate Student Researchers Program for financial assistance.
Record Number:CaltechAUTHORS:KAMprd91a
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:KAMprd91a
Alternative URL:http://dx.doi.org/10.1103/PhysRevD.43.1774
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:3478
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:08 Jun 2006
Last Modified:26 Dec 2012 08:54

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