A possible mechanisms to produce EHE/UHE neutrinos is
Annihilation or collapse of topological defects (TDs)
Decay of topological defects such as monopoles, cosmic strings would release
their trapped energy in the form of supermassive gauge bosons and Higgs bosons.
Further decay of these "X-particles" can give rise into quarks, gluons,
leptons, etc.,
which materialize into EHE Nucleons, photons, and neutrinos
with energies up to the GUT scale. (10^{14}-10^{16} GeV = 10^{13}-10^{15} eV)
The figure shows the fluxes of the cosmic neutrinos produced by this mechanism.
Neutrinos resulting from such decays reach energies of the grand unification
(GUT) scale, and collisions of superhigh energy neutrinos with the cosmic
background neutrinos initiate neutrino cascading which enhances the EHE
neutrino flux at Earth.
The cosmic neutrino flux produced by monopoles formed in symmetry-breaking
phase transitions in the early universe (Yoshida, Sommers et al 1995).
Return to Neutrino Page
Return to Smoot Group Page
Smoot@cosmos.lbl.gov
