The Impact of Heavy Nuclei on the Cosmogenic Neutrino Flux

Details The Impact of Heavy Nuclei on the Cosmogenic Neutrino Flux The Impact of Heavy Nuclei on the Cosmogenic Neutrino Flux

2004-07-29

arxiv.org/abs/astro-ph/0407618v2

Astropart.Phys.23:11-17,2005

Astronomy and Astrophysics

Astrophysics

10 pages, 3 figures; results revised to account for numerical error in propagation Monte Carlo, no significant change in concl

Scientific paper

10.1016/j.astropartphys.2004.11.

As ultra-high energy cosmic ray protons propagate through the universe, they undergo photo-meson interactions with the cosmic microwave background, generating the `cosmogenic' neutrino flux. If a substantial fraction of the cosmic ray primaries are heavy nuclei rather than protons, however, they would preferentially lose energy through photo-disintegration, so the corresponding neutrino flux may be substantially depleted. We investigate this issue using a Monte Carlo simulation of cosmic ray propagation through interagalactic radiation fields and assess the impact of the altered neutrino fluxes on next generation neutrino telescopes.

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