2018 Fiscal Year Final Research Report
Neutrino physics and the origin of the Universe
| Project Area | Unification and Development of the Neutrino Science Frontier |
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| Project/Area Number |
25105011
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| Research Category |
Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
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| Allocation Type | Single-year Grants |
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| Review Section |
Science and Engineering
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| Research Institution | High Energy Accelerator Research Organization |
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Principal Investigator |
Kitano Ryuichiro 大学共同利用機関法人高エネルギー加速器研究機構, 素粒子原子核研究所, 教授 (50543451)
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| Co-Investigator(Kenkyū-buntansha) |
大河内 豊 九州大学, 基幹教育院, 准教授 (40599990)
伊部 昌宏 東京大学, 宇宙線研究所, 准教授 (50599008)
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| Research Collaborator |
ENDO motoi
KAWASAKI masahiro
MATSUMOTO shigeki
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| Project Period (FY) |
2013-06-28 – 2018-03-31
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| Keywords | 素粒子論 |
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| Outline of Final Research Achievements |
It is now understood that the Universe has started by the inflation era where the space expands explosively. The production of particles happens after the inflation, and it thermalizes the Universe. The temperature drops as time goes, and we observe the Universe in the present form after 13.8 Billion years of histories. There are several mysteries which cannot be understood within the particle physics as we know now. In this research project, many new results are obtained for the understanding of these mysteries, such as "Baryon asymmetry of the Universe," "Nature and origin of Dark Matter," and "Mechanism of inflation." For example, it is reported that the oscillation phenomena of the neutrinos produced in the particle production era can explain the baryon asymmetry of the Universe. This new scenario directly relates the on-ground neutrino oscillation experiments and the structure of the Universe.
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| Free Research Field |
素粒子論
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| Academic Significance and Societal Importance of the Research Achievements |
加速器で作られたニュートリノを長距離飛ばして観測する長基線ニュートリノ振動実験や、宇宙からやってくる超高エネルギーニュートリノを捕まえるIceCube実験など、さまざまな最新実験により、ニュートリノの素粒子としての性質や、宇宙におけるニュートリノのエネルギー分布などがどんどんわかってきている。本研究では、実験結果がどのように理論を反映しているのか、また、宇宙の成り立ちとどう関係しているのか考察し、様々な知見をえることができた。
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