A Novel Numerical Approach to Angular Distributions of Atmospheric Neutrinos
An accurate atmospheric neutrino flux is crucial for a multitude of physics studies with the modern neutrino telescopes; as a signal for neutrino oscillation measurements, and as a background for searches of astrophysical neutrino sources. For precision calculations at energies below a few GeV, whic...
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| Format: | Conference Object |
| Language: | unknown |
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2022
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| Online Access: | https://zenodo.org/record/6767375 https://doi.org/10.5281/zenodo.6767375 |
| Summary: | An accurate atmospheric neutrino flux is crucial for a multitude of physics studies with the modern neutrino telescopes; as a signal for neutrino oscillation measurements, and as a background for searches of astrophysical neutrino sources. For precision calculations at energies below a few GeV, which are within reach of the IceCube Upgrade and KM3NeT-ORCA, the lateral component of hadronic cascades becomes important, requiring three-dimensional calculation schemes. We present a novel numerical technique for the two-dimensional (longitudinal + angular) evolution of the air showers using the MCEq (Matrix Cascade Equations) code. By comparing our numerical solutions to those obtained with the Monte Carlo cascade codes, we show that our method is fast and accurate. We provide such comparisons for a range of shower inclinations, primary cosmic ray spectra, and show the impact of the hadronic interaction model choices on the resulting angular distributions. |
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