2023 Fiscal Year Final Research Report
The next generation of CMB observation that will realize the neutrino mass measurement and the exploration of super-TeV physics
| Project Area | Exploration of Particle Physics and Cosmology with Neutrinos |
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| Project/Area Number |
18H05539
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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 | The University of Tokyo |
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Principal Investigator |
Kusaka Akito 東京大学, 大学院理学系研究科(理学部), 准教授 (20785703)
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| Co-Investigator(Kenkyū-buntansha) |
木内 健司 東京大学, 大学院理学系研究科(理学部), 助教 (00791071)
小栗 秀悟 国立研究開発法人宇宙航空研究開発機構, 宇宙科学研究所, 助教 (20751176)
服部 誠 東北大学, 理学研究科, 准教授 (90281964)
鈴木 惇也 京都大学, 理学研究科, 助教 (90795014)
田島 治 京都大学, 理学研究科, 准教授 (80391704)
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| Project Period (FY) |
2018-06-29 – 2023-03-31
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| Keywords | 宇宙マイクロ波背景放射 / ニュートリノ / インフレーション / アクシオン |
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| Outline of Final Research Achievements |
Using data from the POLARBEAR experiment, the predecessor of the Simons Array, we achieved: 1) the detection of the correlation of the gravitational lensing effect with the Subaru/HSC galaxy survey with a significance level of 3.5sigma, 2) the search for the cosmic inflation signature, and 3) the Axion search using observations of strongly polarized Crab Nebula. We also conducted observations with GroundBIRD at a high-sensitivity focal plane and developed a calibration method. In research and development for next-generation experiments, we built a system to simultaneously characterize thousands of superconducting detectors, developed readout electronics using 5G technology, and developed optical technology. We also conducted research on the contribution of galactic foreground contribution on the components that have been neglected to date.
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| Free Research Field |
宇宙物理学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究により、宇宙背景放射 (CMB) の偏光観測から宇宙の暗黒物質やニュートリノなどの宇宙の暗黒成分の理解が深まり、またより高い精度でCMBの偏光観測を行うための方法論を進歩させた。この成果を将来実験に適用すれば、我々の住む宇宙がどうやって始まったのか、どうやって進化してきたのかという誰もが持ちうる問いへの答えに結びつき、社会的意義は大きい。
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