2021 Fiscal Year Final Research Report
Particle Physics Beyond Standard Model and Novel Space Time Picture
| Project Area | New expansion of particle physics of post-Higgs era by LHC revealing the vacuum and space-time structure |
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| Project/Area Number |
16H06490
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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 | Tohoku University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
磯 暁 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 (20242092)
諸井 健夫 東京大学, 大学院理学系研究科(理学部), 教授 (60322997)
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| Project Period (FY) |
2016-06-30 – 2021-03-31
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| Keywords | 素粒子物理学 / 超対称性 / 宇宙論 |
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| Outline of Final Research Achievements |
Our research has three themes: bottom-up research based on the elucidation of new electroweak physics, top-down research based on superstring theory, and research on the evolutionary history of the universe based on new physics, through which we aim to deepen our understanding of space-time.
As a specific research achievement, we completed the first ever detailed calculation of the decay rate of the electroweak vacuum in the Standard Model. Research was conducted on methods to search for and verify supersymmetric particles in future accelerator experiments. We also studied a model that derives the electroweak scale from the Planck scale by considering stationary solutions of superstring theory with a rotating D-brane system. Furthermore, we clarified the consistency of long-lived unstable particles appearing in the new physics with the Big Bang elemental synthesis scenario.
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| Free Research Field |
素粒子論
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| Academic Significance and Societal Importance of the Research Achievements |
LHCにおけるヒッグス粒子の発見により素粒子の標準模型は完成したものの、標準模型は理論的には不自然な理論と考えられ、新物理の存在が期待される。また宇宙論に目を向ければ暗黒物質の存在など標準模型を超える物理の存在が示唆されている。本研究では、新物理に対して、素粒子物理学、超弦理論、宇宙論など多角的な観点から、新物理がどのこれらの分野にどのような帰結をもたらすか研究を進めてきた。LHC等の実験によりまだ新物理は発見されていないが、本研究の成果は新物理に制限を与えるとともに、将来の新物理の発見がもたらす宇宙発展や時空の理解へ貢献することが期待される。
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