ATLAS can measure the energy-dependent atmospheric muon neutrino to antineutrino flux ratio up to 100 GeV muon energy using contained and external upward-going muon events over 1000 live days, expecting R=2.05 for external events.
High energy extension of the FLUKA atmospheric neutrino flux
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abstract
The atmospheric neutrino flux calculated with FLUKA was originally limited to 100-200 GeV for statistical reasons. In order to make it available for the analysis of high energy events, like upward through-going muons detected by neutrino telescopes, we have extended the calculation so to provide a reliable neutrino yield per primary nucleon up to about 10**6 GeV/nucleon, as far as the interaction model is concerned. We point out that the primary flux model above 100 GeV/nucleon still contributes with an important systematic error to the neutrino flux.
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Prospects of measuring the atmospheric muon neutrino and anti-neutrino flux ratio with the ATLAS detector
ATLAS can measure the energy-dependent atmospheric muon neutrino to antineutrino flux ratio up to 100 GeV muon energy using contained and external upward-going muon events over 1000 live days, expecting R=2.05 for external events.