Skip to Main content Skip to Navigation
Journal articles

Antiproton and Positron Signal Enhancement in Mini-Spikes Scenarios

Abstract : The annihilation of dark matter in the Galaxy could be signed as specific imprints on spectra of antimatter species in Galactic cosmic rays. Many studies are devoted to this topic, and in that context, an enhancement of the signal is often introduced and referred to as the so-called boost factor. Recent studies show that not only this factor does depend on energy, but it is intrinsically a statistical property of the distribution of DM substructures inside the Milky Way. Therefore a large variance affects the prediction of the signal enhancement due to the clumpiness of the DM halo. We investigate a scenario in which substructures consist in a relatively small number of mini-spikes formed around intermediate-mass black holes, and find boosts of order a few thousand, with a high dispersion.
Complete list of metadatas

http://hal.in2p3.fr/in2p3-00142653
Contributor : Claudine Bombar <>
Submitted on : Friday, April 20, 2007 - 12:01:47 PM
Last modification on : Wednesday, July 22, 2020 - 9:54:13 AM

Links full text

Identifiers

Collections

Citation

P. Brun, G. Bertone, J. Lavalle, P. Salati, Richard Taillet. Antiproton and Positron Signal Enhancement in Mini-Spikes Scenarios. Physical Review D, American Physical Society, 2007, 76, pp.083506. ⟨10.1103/PhysRevD.76.083506⟩. ⟨in2p3-00142653⟩

Share

Metrics

Record views

162