1998/06/09 by M. Kachelriess, Kachelriess, M.
Physics and Astronomy · #Astrophysics (astro-ph) #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #astro-ph #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/9806322
9 pages, 3 figures, style file included. Based on a talk presented at XXXIIIrd Rencontres de Moriond: Electroweak Interactions and Unified Theories
arxiv created 1998/06/09 · arxiv updated 2009/11/30
Recently, models proposing superheavy particles X as source of ultrahigh energy cosmic rays have attracted some interest. The X-particles are either metastable relic particles from the early Universe or are released by topological defects. In these models, the detected air-showers are produced by primaries originating from the fragmentation of the X-particles. We present the fragmentation spectrum of superheavy particles calculated in SUSY-QCD. Then we discuss the status of the lightest supersymmetric particle as possible ultrahigh energy primary.