Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-07-29
Phys.Rev.D70:103529,2004
Physics
High Energy Physics
High Energy Physics - Phenomenology
17 pages, 9 tables and 14 figures, typeset with ReVTeX4. A Figure and a comment on the recent HESS data have been added. The v
Scientific paper
10.1103/PhysRevD.70.103529
We discuss the gamma-ray signal from dark matter annihilation in our Galaxy and in external objects, namely the Large Magellanic Cloud, the Andromeda Galaxy (M31) and M87. We derive predictions for the fluxes in a low energy realization of the Minimal Supersymmetric Standard Model and compare them with current data from EGRET, CANGAROO-II and HEGRA and with the capabilities of new-generation satellite-borne experiments, like GLAST, and ground-based Cerenkov telescopes, like VERITAS. We find fluxes below the level required to explain the possible indications of a gamma-ray excess shown by CANGAROO-II (toward the Galactic Center) and HEGRA (from M87). As far as future experiments are concerned, we show that only the signal from the galactic center could be accessible to both satellite-borne experiments and to ACTs, even though this requires very steep dark matter density profiles.
Fornengo Nicolao
Pieri Lidia
Scopel Stefano
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