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arXiv · hep-ph/0105064

Determination of absolute neutrino masses from Z-bursts

Z. Fodor·S. D. Katz·A. Ringwald
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Abstract

Ultrahigh energy neutrinos (UHEν) scatter on relic neutrinos (Rν) producing Z bosons, which can decay hadronically producing protons (Z-burst). We compare the predicted proton spectrum with the observed ultrahigh energy cosmic ray (UHECR) spectrum and determine the mass of the heaviest Rνvia a maximum likelihood analysis. Our prediction depends on the origin of the power-like part of the UHECR spectrum: m_ν=2.75^{+1.28}_{-0.97} eV for Galactic halo and 0.26^{+0.20}_{-0.14} eV for extragalactic (EG) origin. The necessary UHEνflux should be detected in the near future.

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Z. Fodor, S. D. Katz, A. Ringwald. 2002-03-18. Determination of absolute neutrino masses from Z-bursts. https://doi.org/10.1103/physrevlett.88.171101

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