Cosmic Antiprotons from Neutralino Annihilation in the Galactic halo

We investigate the possibility that the antiproton-to-proton flux ratio which is measured in cosmic rays may be generated by neutralino-neutralino annihilation in the galactic halo. We study the most general compositions for the relic neutralinos. We compare our results with the present experimental sensitivity and find that the theoretical predictions are at the level of the current experimental limits for some regions in the parameter space of the model.We expect that the future measurements of the pbar/p will provide very useful information, complementary to the ones obtainable with other experimental means.