2019 Fiscal Year Final Research Report
Why does the Universe accelerate? -Exhaustive study and challenge for the future-
| Project Area | Why does the Universe accelerate? - Exhaustive study and challenge for the future - |
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| Project/Area Number |
15H05887
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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 |
MURAYAMA HITOSHI 東京大学, カブリ数物連携宇宙研究機構, 教授 (20222341)
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| Co-Investigator(Kenkyū-buntansha) |
片山 伸彦 東京大学, カブリ数物連携宇宙研究機構, 教授 (50290854)
樽家 篤史 京都大学, 基礎物理学研究所, 准教授 (40334239)
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| Project Period (FY) |
2015-06-29 – 2020-03-31
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| Keywords | インフレーション / ダークエネルギー / ダークマター / ニュートリノ / 宇宙物理 / 素粒子 |
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| Outline of Final Research Achievements |
The purpose of this innovative research area is to reveal the physics driving accelerating expansion of the universe that should have occurred at the beginning and is now happening today. Main achievements of our program are as follows. (1) Researchers in this program proposed the so-called "swampland" conjecture claiming that low-energy effective field theories involving gravity and quantum field theory are not compatible with string theory. (2) Using high-precision measurements of gravitational lensing effects from the Subaru imaging data, we obtained cosmological parameters. (3) We carried out theoretical and observational researches on primordial black holes that are candidates of dark matter and LIGO gravitational wave counterparts. (4) We carried out developments of instrumentation on the cosmic microwave background experiments and the Subaru multi-object spectrograph.
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| Free Research Field |
素粒子論
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| Academic Significance and Societal Importance of the Research Achievements |
加速宇宙の物理機構の解明に向け、すばる望遠鏡搭載の超広視野主焦点カメラHSCを用いたダークマターの3次元地図の作成、および宇宙論パラメータの測定、すばる超広視野多天体分光器PFSプロジェクトの準備研究、次世代宇宙マイクロ派背景放射CMB探査計画の推進を行った。加えて、異なる宇宙論データの横断的、統合的解析の新たな手法の開発、原始ブラックホールの理論的、観測的研究の新展開、なども得られた。また、超弦理論のみならず素粒子現象論やモデル・ビルディング、宇宙論に大きな影響を与えた量子重力のスワンプランド条件等の究極理論の知見を得て、領域研究への展開を得た。
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