A Three-Dimensional Calculation of Atmospheric Neutrino Fluxes
Yaroslav Tserkovnyak, Robert Komar, Christian Nally, Chris Waltham
TL;DR
This paper presents a comprehensive three-dimensional calculation of atmospheric neutrino fluxes, incorporating detailed models of geomagnetic fields and hadronic interactions, and compares results with previous models to confirm flux enhancements.
Contribution
It introduces a new 3D calculation method for atmospheric neutrino fluxes using advanced models and confirms the geometrical enhancement of low energy, horizontal neutrinos.
Findings
Confirmed geometrical enhancement of low energy, horizontal neutrinos.
Small overall increase in flux due to geometrical effects.
Reported east-west asymmetries for neutrino species.
Abstract
We present a three-dimensional calculation of atmospheric neutrino fluxes using accurate models of the geomagnetic field, hadronic interactions, tracking and decays. Results are presented for the Super-Kamiokande (SK) and Sudbury Neutrino Observatory (SNO) sites using the GEANT-FLUKA hadronic code. We make a comparison with previous one-dimensional calculations and other three-dimensional results. The recently reported geometrical enhancement of low energy, horizontal neutrinos is confirmed. The effect on observed leptons is however, restricted to a small overall increase in flux. We report east-west asymmetries for each of the neutrino species.
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