Galactic Antiprotons And Supersymmetry

An indirect signature of the presence of particle dark matter in the halo of our galaxy is an excess of antiprotons at low energy. The data of the low-energy cosmic-ray (p) over bar spectrum, that have been recently published by the BESS Collaboration, are presented here in the light of newly calculated fluxes for secondary antiprotons. The possible contribution of an exotic signal due to neutralino annihilation is analyzed. The supersymmetric configurations that are compatible with the BESS results are derived [1]. We discuss future prospects for disentangling the possible neutralino-induced contribution from the conventional spallation signal.