Grand unification signal from ultrahigh energy cosmic rays?

Z. Fodor, S. D. Katz

Research output: Contribution to journalArticlepeer-review

48 Scopus citations


The interaction of protons with photons in the cosmic microwave background radiation (CMBR) was analyzed. The spectrum of ultrahigh energy cosmic rays was found to be consistent with the decay of grand unification scale particles. The mass of the X particle mx was then measured and its effects on the interactions were observed.

Original languageEnglish (US)
Pages (from-to)3224-3227
Number of pages4
JournalPhysical review letters
Issue number15
StatePublished - Apr 9 2001

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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