Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10723080 | Physics Letters B | 2010 | 4 Pages |
Abstract
Sommerfeld enhancement and Breit-Wigner enhancement of the dark matter annihilation have been proposed to explain the “boost factor” which is suggested by observed cosmic ray excesses. Although these two scenarios can provide almost indistinguishable effects on the cosmic ray fluxes, the cross sections of the self-interaction in those enhancement mechanisms are drastically different. As a result, we might be able to distinguish them by examining the effects of the self-interaction on the dark matter halo shapes. In the Sommerfeld enhancement models with mÏâ²100 MeV and mDMâ²3 TeV, the self-interaction of dark matter can lead to more spherical dark halo. In the Breit-Wigner models, the dark matter is effectively collisionless.
Keywords
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Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
Masahiro Ibe, Hai-Bo Yu,