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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2603.09334 |
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Table of Contents:
- We have incorporated a hadron interaction tuning based on accelerator data into our atmospheric neutrino flux calculation, which has been used to analyze atmospheric neutrino oscillations at Super-Kamiokande. This new approach enables a more direct evaluation of the flux uncertainty than a conventional tuning using atmospheric muons. The neutrino flux calculated with this new tuning is 5\%--10\% smaller but still consistent with our previously published prediction within its uncertainty. The flavor ratio $(ν_μ+\barν_μ)/(ν_e+\barν_e)$ and $\barν/ν$ ratios were consistent with the previous prediction. Based on the measurement errors of the accelerator data, we evaluated the flux uncertainty associated with the new tuning to be 7\%--9\% in the $E_ν <$ 1 GeV region, which was difficult to assess with the conventional tuning. The flux uncertainty in the $1<E_ν<10$ GeV region was evaluated to be 5\%--7\%, which is an improvement over the conventional tuning.