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Article
Report number	astro-ph/9606174 ; CERN-TH-96-114 ; ENSLAPP-A-550-96 ; CERN-TH-96-114 ; ENSLAPP-A-550
Title	Galactic diffusion and the antiproton signal of supersymmetric dark matter
Related title	Galactic diffusion and the anti-proton signal of supersymmetric dark matter
Author(s)	Chardonnet, Pascal (Annecy, LAPP ; Savoie U.) ; Mignola, Giulio (CERN ; INFN, Turin) ; Salati, Pierre (Annecy, LAPP ; Savoie U.) ; Taillet, Richard (Annecy, LAPP ; Savoie U.)
Affiliation	(ENSLAPP Annecy) ; (Univ. de Savoie Chambery) ; (CERN) ; (INFN Torino) ; (Inst. Universitaire de France)
Publication	1999-02-12
Imprint	28 Jun 1996
Number of pages	8
Note	14 pages, LaTeX, 4 postscript figures appended as uuencoded g-zipped tar file Report-no: CERN-TH/96-114, ENSLAPP-A-550/96
In:	Phys. Lett. B 384 (1996) 161-168
In:	25th International Conference on Cosmic Rays, pp.253-256
DOI	10.1016/0370-2693(96)00815-5
Subject category	Astrophysics and Astronomy
Abstract	The leaky box model is now ruled out by measurements of a cosmic ray gradient throughout the galactic disk. It needs to be replaced by a more refined treatment which takes into account the diffusion of cosmic rays in the magnetic fields of the Galaxy. We have estimated the flux of antiprotons on the Earth in the framework of a two-zone diffusion model. Those species are created by the spallation reactions of high-energy nuclei with the interstellar gas. Another potential source of antiprotons is the annihilation of supersymmetric particles in the dark halo that surrounds our Galaxy. In this letter, we investigate both processes. Special emphasis is given to the antiproton signature of supersymmetric dark matter. The corresponding signal exceeds the conventional spallation flux below 300 MeV, a domain that will be thoroughly explored by the Antimatter Spectrometer experiment. The propagation of the antiprotons produced in the remote regions of the halo back to the Earth plays a crucial role. Depending on the energy, the leaky box estimates are wrong by a factor varying from 0.5 up to 3.
Copyright/License	Copyright @ unknown. Published by Elsevier B.V.

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