Papers › A Comprehensive Approach to Tau-Lepton Production by High-Energy Tau Neutrinos...
A Comprehensive Approach to Tau-Lepton Production by High-Energy Tau Neutrinos Propagating Through Earth
Jaime Alvarez-Muñiz, Washington R. Carvalho Jr, Kévin Payet, Andrés Romero-Wolf, Harm Schoorlemmer, Enrique Zas
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There has been a recent surge in interest in the detection of τ lepton-induced air showers from detectors at altitude. When a τ neutrino (ν_τ) enters the Earth it produces τ leptons as a result of nuclear charged current interactions. In some cases, this process results in a τ lepton exiting the surface of the Earth, which can subsequently decay in the atmosphere and produce an extensive air shower. These upward-going air showers can be detected via fluorescence, optical Cherenkov, or geomagnetic radio emission. Several experiments have been proposed to detect these signals. We present a comprehensive simulation of the production of τ leptons by ν_τ's propagating through Earth to aid the design of future experiments. These simulations for ν_τ's and leptons in the energy range from 10¹⁵ eV to 10²¹ eV treat the full range of incidence angles from Earth-skimming to diametrically-traversing. Propagation of ν_τ's and leptons include the effects of rock and an ocean or ice layer of various thicknesses. The interaction models include ν_τ regeneration and account for uncertainties in the Standard Model neutrino cross-section and in the photo-nuclear contribution to the τ energy loss rate.
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