2001/05/31 by Z. Fodor, S. D. Katz, A. Ringwald +1 · 2 citations
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Neutrino Physics Research #Particle physics theoretical and experimental studies #astro-ph #hep-ex #hep-ph
paper · pdf · doi:10.1103/physrevlett.88.171101
published as Phys.Rev.Lett. 88 (2002) 171101 · slight rewording, revised neutrino fluxes, conclusions unchanged, version to appear in Phys. Rev. Lett
arxiv created 2002/03/18 · openalex publication_date 2002/04/16 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Ultrahigh energy neutrinos (UHE\ensuremathν) scatter on relic neutrinos (R\ensuremathν) 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 R\ensuremathν via a maximum likelihood analysis. Our prediction depends on the origin of the powerlike part of the UHECR spectrum: m_\ensuremathν\phantom\rule0ex0ex=\phantom\rule0ex0ex2.75_\ensuremath-0.97+1.28eV for Galactic halo and 0.26_\ensuremath-0.14+0.20eV for extragalactic origin. The necessary UHE\ensuremathν flux should be detected in the near future.