TY - JOUR
T1 - Ultrahigh energy cosmic rays
T2 - 26th Johns Hopkins Workshop on Current Problems in Particle Theory: High Energy Reactions, JHW 2002
AU - Fodor, Z.
N1 - Funding Information:
Z.F thanks the organisers of the 26th Johns Hopkins Workshop on Current Problems in Particle Physics for the stimulating atmosphere. This work was partially supported by Hung. Sci. grants No. OTKA-T37615T34980/T29803/M37071M28413/OM-MU-708/-OMFB-1548.
Publisher Copyright:
© 2002 Sissa Medialab Srl. All rights reserved.
Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.
PY - 2002
Y1 - 2002
N2 - The origin of highest energy cosmic rays (UHECR) is yet unknown. In order to understand their propagation we determine the probability that an ultrahigh energy (above 5 · 1019 eV) proton created at a distance r with energy E arrives at earth above a threshold Ec. The clustering of ultrahigh energy cosmic rays suggests that they might be emitted by compact sources. A statistical analysis on the source density based on the multiplicities is presented. The ultrahigh energy cosmic ray spectrum is consistent with the decay of GUT scale particles. Alternatively, we consider the possibility that a large fraction of the ultrahigh energy cosmic rays are decay products of Z bosons which were produced in the scattering of ultrahigh energy cosmic neutrinos on cosmological relic neutrinos. Based on this scenario we determine the required mass of the heaviest relic neutrino. The required ultrahigh energy neutrino flux should be detected in the near future by experiments such as AMANDA, RICE or the Pierre Auger Observatory.
AB - The origin of highest energy cosmic rays (UHECR) is yet unknown. In order to understand their propagation we determine the probability that an ultrahigh energy (above 5 · 1019 eV) proton created at a distance r with energy E arrives at earth above a threshold Ec. The clustering of ultrahigh energy cosmic rays suggests that they might be emitted by compact sources. A statistical analysis on the source density based on the multiplicities is presented. The ultrahigh energy cosmic ray spectrum is consistent with the decay of GUT scale particles. Alternatively, we consider the possibility that a large fraction of the ultrahigh energy cosmic rays are decay products of Z bosons which were produced in the scattering of ultrahigh energy cosmic neutrinos on cosmological relic neutrinos. Based on this scenario we determine the required mass of the heaviest relic neutrino. The required ultrahigh energy neutrino flux should be detected in the near future by experiments such as AMANDA, RICE or the Pierre Auger Observatory.
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M3 - Conference article
AN - SCOPUS:85057064446
VL - 9
JO - Proceedings of Science
JF - Proceedings of Science
SN - 1824-8039
Y2 - 1 August 2002 through 3 August 2002
ER -