Speaker
Description
Atmospheric neutrinos and cosmic-ray muons are generated from the air showers of secondary particles via the interactions of primary cosmic-ray particles with air nuclei at the top of the atmosphere. The meson, such as pion and kaon, decays into atmospheric neutrino and cosmic-ray muon, reflecting the information of the hadronic interactions depending on their energy. Atmospheric neutrinos are an important source for studying neutrino oscillations. However, current atmospheric neutrino flux models still have significant uncertainties, such as the neutrino-to-antineutrino ratio and the absolute flux. One major source of these uncertainties is the poor knowledge about parent meson ratio. To constrain these uncertainties, we consider the usable of cosmic-ray muon data.
In this poster, we use cosmic-ray muons at TeV region detected by the Super-Kamiokande detector and analyze their time variation and correlation with atmospheric temperature. From this analysis, we extract the pion-to-kaon ratio of the parent mesons. These results provide new constraints on atmospheric neutrino flux parameters.