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Grand unification signal from ultrahigh energy cosmic rays?
1Institute for Theoretical Physics, Eötvös University, Pázmány 1, H-1117 Budapest, Hungary.
Physical Review Letters
|May 1, 2001
Abstract:
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).