Abstract
Atmospheric neutrino flux calculation ATMNC has greatly contributed to the physics of neutrino experiments including Super-Kamiokande. Since next-generation large-scale experiments, such as Hyper-Kamiokande, are expected a large improvement of statistical errors, it is desirable to reduce systematic errors associated with uncertainty of the flux calculation. The dominant uncertainty of the ATMNC calculation arises from insufficient understanding of the hadron interactions inside air showers caused by cosmic rays. In order to improve the accuracy of the hadron interaction model, many precision measurements for hadron production using accelerator beams have been performed or planned. In this report, we discuss a strategy to update ATMNC calculation to reduce its uncertainty by incorporating such measurements.
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