Neutrino clustering and the Z-burst model

Details Neutrino clustering and the Z-burst model Neutrino clustering and the Z-burst model

2001-06-12

arxiv.org/abs/hep-ph/0106123v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages and 3 figures. Contributed to the XX International Symposium on Lepton and Photon Interactions at High Energies, Rome

Scientific paper

The possibility that the observed Ultra High Energy Cosmic Rays are generated by high energy neutrinos creating "Z-bursts" in resonant interactions with the background neutrinos has been proposed, but there are difficulties in generating enough events with reasonable incident neutrino fluxes. We point out that this difficulty is overcome if the background neutrinos have coalesced into "neutrino clouds" --- a possibility previously suggested by some of us in another context. The limitations that this mechanism for the generation of UHECRs places on the high energy neutrino flux, on the masses of the background neutrinos and the characteristics of the neutrino clouds are spelled out.

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