Radio-detection of neutrino-induced air showers: the influence of topography

Abstract

Neutrinos of astrophysical origin could be detected through the electromagnetic radiation of the particle showers induced in the atmosphere by their interaction in the Earth. This applies in particular for tau neutrinos of energies $E>10^{16}$eV following Earth-skimming trajectories. The $\sim 1^{\circ }$ beaming of the radio emission in the forward direction however implies that the radio signal will likely fly above a detector deployed over a flat site and would therefore not be detected. We study here how a non-flat detector topography can improve the detection probability of these neutrino-induced air showers. We do this by computing with three distinct tools the neutrino detection efficiency for a radio array deployed over a toy-model mountainous terrain, also taking into account experimental and topographic constraints. We show in particular that ground topographies inclined by few degrees only induce detection efficiencies typically three times larger than those obtained for flat areas for favorable trajectories. We conclude that the topography of the area where the detector is deployed will be a key factor for an experiment like GRAND.

arXiv comment29 pages, 13 figures

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Cited by in corpus (4)

• Tau Neutrinos in the Next Decade: from GeV to EeV
• Prospects for High-Elevation Radio Detection of >100 PeV Tau Neutrinos
• Radio wavefront of very inclined extensive air-showers: a simulation study for extended and sparse radio arrays
• Polarisation signatures in radio for inclined cosmic-ray induced air-shower identification