  More than a decade ago it was noticed that an unexpectedly large value of the
measured cosmic antiproton flux at low kinetic energies could be interpreted in
terms of a neutralino-induced component. An overproduction of low energy
antiprotons seems however to be disfavoured by recent data from the BESS
experiment. The strategy we propose here is to focus instead on the high energy
antiproton spectrum. We find cases in which the signal from neutralino
annihilations in a clumpy halo scenario can be unambiguously distinguished from
the cosmic ray induced component. Such signatures can be tested in the near
future by upcoming experiments. We investigate also the possibility that
antiprotons have a finite lifetime. We find cases in which the
neutralino-induced flux is consistent with present data for a lifetime as low
as 0.15 Myr, in clear violation of a recent bound derived from the antiproton
cosmic ray flux.
