Enhanced signal of astrophysical tau neutrinos propagating through Earth

Details Enhanced signal of astrophysical tau neutrinos propagating through Earth Enhanced signal of astrophysical tau neutrinos propagating through Earth

2001-11-26

arxiv.org/abs/astro-ph/0111482v1

Phys.Rev. D66 (2002) 021302

Astronomy and Astrophysics

Astrophysics

Four pages, two inline figures

Scientific paper

10.1103/PhysRevD.66.021302

Earth absorbs $\nue$ and $\numu$ of energies above about 100 TeV. As is well-known, although $\nutau$ will also disappear through charged-current interactions, the $\nutau$ flux will be regenerated by prompt tau decays. We show that this process also produces relatively large fluxes of secondary $\nube$ and $\nubmu$, greatly enhancing the detectability of the initial $\nutau$. This is particularly important because at these energies $\nutau$ is a significant fraction of the expected astrophysical neutrino flux, and only a tiny portion of the atmospheric neutrino flux.

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