Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-11-09
Physics
High Energy Physics
High Energy Physics - Phenomenology
8 pages, 11 figures, needs icrc.cls (included). Invited so-called "Highlight Talk", to appear in the Proceedings of the 27th I
Scientific paper
Recently the possibility was widely discussed that a large fraction of the highest energy cosmic rays may be decay products of Z bosons which were produced in the resonant annihilation of ultrahigh energy cosmic neutrinos on cosmological relic neutrinos. If one takes this so-called Z-burst scenario seriously, one may infer the mass of the heaviest relic neutrino as well as the necessary ultrahigh energy cosmic neutrino flux from a comparison of the predicted Z-burst spectrum with the observed cosmic ray spectrum.
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