LIMITING SUSY-QCD SPECTRUM AND ITS APPLICATION FOR DECAYS OF SUPERHEAVY PARTICLES

The supersymmetric generalization of the limiting and Gaussian QCD spe ctra is obtained. These spectra are valid for x much less than 1, when the main contribution to the parton cascade is given by gluons and gl uinos. The derived spectra are applied to decaying superheavy particle s with masses up to the GUT scale, These particles can be relies from the Big Bang or produced by topological defects and could give rise to the observed ultrahigh energy cosmic rays. General formulae for the f luxes of protons, photons and neutrinos due to decays of superheavy pa rticles are obtained. (C) 1998 Elsevier Science B.V. All rights reserv ed.