High energy Gamma-Ray Bursts as a result of the collapse and total   annihilation of neutralino clumps
  Rare astrophysical events - cosmological gamma-ray bursts with energies over GeV - are considered as an origin of information about some SUSY parameters. The model of generation of the powerful gamma-ray bursts is proposed. According to this model the gamma-ray burst represents as a result of the collapse and the total annihilation of the neutralino clump. About 80 % of the clump mass radiates during about 100 second at the final stage of annihilation. The annihilation spectrum and its characteristic energies are calculated in the framework of Split Higgsino model. 
R. S. Pasechnik, V. A. Beylin, V. I. Kuksa and G. M. Vereshkov