title: Grand unification signal from ultrahigh energy cosmic rays?
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).
authors.affiliation: Institute for Theoretical Physics, Eötvös University, Pázmány 1, H-1117 Budapest, Hungary.
authors.forename: Z
authors.initials: Z
authors.lastname: Fodor
authors.forename: S D
authors.initials: SD
authors.lastname: Katz