  The detection of gamma-rays, antiprotons and positrons due to pair
annihilation of dark matter particles in the Milky Way halo is a viable
indirect technique to search for signatures of supersymmetric dark matter where
the major challenge is the discrimination of the signal from the background
generated by standard production mechanisms. The new PAMELA antiproton data are
consistent with the standard secondary production and this allows us to
constrain exotic contribution to the spectrum due to neutralino annihilations.
In particular, we show that in the framework of minimal supergravity (mSUGRA),
in a clumpy halo scenario (with clumpiness factor > 10) and for large values of
tan(beta)> 55, almost all the parameter space allowed by WMAP is excluded.
  Instead, the PAMELA positron fraction data exhibit an excess that cannot be
explained by secondary production. PPB-BETS and ATIC reported a feature in
electron spectrum at a few hundred GeV. The excesses seem to be consistent and
imply a source, conventional or exotic, of additional leptonic component. Here
we discuss the status of indirect dark matter searches and a perspective
forPAMELA and Fermi gamma-ray space telescope (Fermi) experiments.

Astrophysics