Cosmic-Ray Positron from Superparticle Dark Matter and the PAMELA   Anomaly
  Motivated by the anomalous positron flux recently reported by the PAMELA collaboration, we study the cosmic-ray positron produced by the pair annihilation and the decay of superparticle dark matter. We calculate the cosmic-ray positron flux and discuss implications of the PAMELA data. We show that the positron excess observed by the PAMELA can be explained with some of the superparticle dark matter. 
Koji Ishiwata, Shigeki Matsumoto, Takeo Moroi