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Neutrino propagation in the Earth and emerging charged leptons with $\texttt{nuPyProp}$

Diksha GargSameer PatelMary Hall Reno ...+21 Stephanie Wissel
Sep 2022
摘要
Ultra-high-energy neutrinos serve as messengers of some of the highest energyastrophysical environments. Given that neutrinos are neutral and only interactvia weak interactions, neutrinos can emerge from sources, traverse astronomicaldistances, and point back to their origins. Their weak interactions requirelarge target volumes for neutrino detection. Using the Earth as a neutrinoconverter, terrestrial, sub-orbital, and satellite-based instruments are ableto detect signals of neutrino-induced extensive air showers. In this paper, wedescribe the software code $\texttt{nuPyProp}$ that simulates tau neutrino andmuon neutrino interactions in the Earth and predicts the spectrum of the$\tau$-lepton and muons that emerge. The $\texttt{nuPyProp}$ outputs are lookuptables of charged lepton exit probabilities and energies that can be useddirectly or as inputs to the $\texttt{nuSpaceSim}$ code designed to simulateoptical and radio signals from extensive air showers induced by the emergingcharged leptons. We describe the inputs to the code, demonstrate itsflexibility and show selected results for $\tau$-lepton and muon exitprobabilities and energy distributions. The $\texttt{nuPyProp}$ code is opensource, available on github.
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