Grand unification signal from ultrahigh energy cosmic rays?
The spectrum of ultrahigh energy (above approximately 10(9) GeV) cosmic rays is consistent with the decay of grand unification scale particles. The predicted mass is m(X) = 10(b) GeV, where b = 14.6(+1.6)(-1.7).
Fodor
Z
Z
Institute for Theoretical Physics, Eötvös University, Pázmány 1, H-1117 Budapest, Hungary.
Katz
S D
SD