Estimation for the physics potential of neutrino oscillation experiments with J-PARC.
Project/Area Number |
26400254
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
|
Research Institution | International University of Health and Welfare |
Principal Investigator |
Okamura Naotoshi 国際医療福祉大学, 保健医療学部, 准教授 (40402812)
|
Project Period (FY) |
2014-04-01 – 2019-03-31
|
Project Status |
Completed (Fiscal Year 2018)
|
Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
|
Keywords | ニュートリノ振動 / ニュートリノ物理 / 素粒子理論 / 素粒子物理学 |
Outline of Final Research Achievements |
Three parameters which are related to the neutrino oscillation are remained as unknown or unmeasured with enough precision. Especially, mass hierarchy pattern and CP phase in the MNS matrix are one of the main targets for the next generation neutrino experiment. In this study, we reanalyze the physics potential of Tokai-to-Kamioka-and-Korea (T2KK) and Tokai-to-Kamioka-and-Oki(T2KO) proposal, which are the ideas for the extension of the T2K experiment, with more realistic conditions. From our analysis, the mass hierarchy is determined with 3-5 sigma by the T2KK experiment and 1-4 sigma by the T2KO experiment. We also find that the CP phase can be measured with the uncertainty of 20-50 degree by both experiments. These results are depending on the mass hierarchy and the value of CP phase which are realized in nature.
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Academic Significance and Societal Importance of the Research Achievements |
本研究を含むこれまでの研究によって、ニュートリノ振動に関係する質量階層性やCP位相の測定が、実現可能な技術で且つ多額の費用を必要とせずに測定できることを示すことができた。 本研究はT2KK実験とT2KO実験に特化しているが、両実験の物理能力が高い理由を論理的に突き詰めているため、本研究の結論は、T2KK実験やT2KO実験のみならず、次世代ニュートリノ振動実験の実験計画策定に重要な示唆を与えるものと期待できる。 本研究を含む我々の一連の研究は東アジアでのニュートリノ振動実験に一定の方向性を与え、今後T2HKK実験等の計画立案に基礎的な指針を与えるものと思っている。
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Report
(6 results)
Research Products
(3 results)