Ultrahigh energy cosmic rays as a Grand Unification signal

Details Ultrahigh energy cosmic rays as a Grand Unification signal Ultrahigh energy cosmic rays as a Grand Unification signal

2001-05-31

arxiv.org/abs/hep-ph/0105348v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 3 figures, talk to be presented at the 27th International Cosmic Ray Conference, Hamburg, Germany, August 7-15, 2001

Scientific paper

We analyze the spectrum of the ultrahigh energy (above \approx 10^{9} GeV)
cosmic rays. With a maximum likelihood analysis we show that the observed
spectrum is consistent with the decay of extragalactic GUT scale particles. The
predicted mass for these superheavy particles is m_X=10^b GeV, where
b=14.6_{-1.7}^{+1.6}.

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