Article révisé par les pairs
Résumé : We study the indirect detection of neutralino dark matter using positrons and gamma rays from its annihilation in the galactic halo. Considering the HESS data as the spectrum constituting the gamma ray background, we compare the prospects for the experiments GLAST and PAMELA in a general supergravity framework with non-universal scalar and gaugino masses. We show that with a boost factor of about 10, PAMELA will be competitive with GLAST for typical NFW cuspy profiles. ©2006 IOP Publishing Ltd and SISSA.