| Co-Investigator(Kenkyū-buntansha) |
久世 正弘 東京工業大学, 理学院, 教授 (00225153)
清水 格 東北大学, ニュートリノ科学研究センター, 准教授 (10400227)
鈴木 州 神戸大学, 理学研究科, 助教 (20243298)
ウェンデル ロジャー 京都大学, 理学研究科, 准教授 (20647656)
石塚 正基 東京理科大学, 理工学部物理学科, 教授 (40533196)
西村 康宏 慶應義塾大学, 理工学部(矢上), 准教授 (40648119)
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| Budget Amount *help |
¥357,760,000 (Direct Cost: ¥275,200,000、Indirect Cost: ¥82,560,000)
Fiscal Year 2022: ¥67,340,000 (Direct Cost: ¥51,800,000、Indirect Cost: ¥15,540,000)
Fiscal Year 2021: ¥72,150,000 (Direct Cost: ¥55,500,000、Indirect Cost: ¥16,650,000)
Fiscal Year 2020: ¥69,160,000 (Direct Cost: ¥53,200,000、Indirect Cost: ¥15,960,000)
Fiscal Year 2019: ¥69,160,000 (Direct Cost: ¥53,200,000、Indirect Cost: ¥15,960,000)
Fiscal Year 2018: ¥79,950,000 (Direct Cost: ¥61,500,000、Indirect Cost: ¥18,450,000)
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| Outline of Final Research Achievements |
Super-Kamiokande has been collecting data since 1996. We have improved the analysis methods of Super-Kamiokande atmospheric neutrino and proton decay searches. With improvements, normal neutrino mass hierarchy and violation of particle-anti-particle symmetry (CP) are found to be favored. We searched for various decay modes of proton and neutron. Still, we could not find any statistically significant signature of decays, set 50% to more than ten times longer lifetime lower bound. These results are still statistically limited, and Hyper-Kamiokande, whose statistical power is much higher, will give us definite answers. We also succeeded in developing devices to further improve the physics capabilities of Hyper-Kamiokande.
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