Ultra high energy cosmic rays: Clustering, GUT scale and neutrino masses

Research output: Contribution to journalArticle


The clustering of ultra high energy (above 5.1019 eV) cosmic rays (UHECR) suggests that they might be emitted by compact sources. We present a statistical analysis on the source density based on the multiplicities. The propagation of UHECR protons is studied in detail. The UHECR spectrum is consistent with the decay of GUT scale particles and/or with the Z-burst. The predicted GUT mass is ℳx = 10b GeV; where b = 14.6-1.7+1.6. Our neutrino mass prediction depends on the origin of the power part of the spectrum: ℳν = 2.75-0.97+1.28 eV for halo and 0.26-0.14+0.20 eV for extragalactic (EG) origin.

Original languageEnglish
Pages (from-to)497-500
Number of pages4
JournalNuclear Physics B - Proceedings Supplements
Publication statusPublished - Jul 1 2002


ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics

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