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2018 Fiscal Year Final Research Report

Unraveling the origin of matter and the evolution of the Universe

Planned Research

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Project AreaRevealing the history of the universe with underground particle and nuclear research
Project/Area Number 26104009
Research Category

Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

Allocation TypeSingle-year Grants
Review Section Science and Engineering
Research InstitutionThe University of Tokyo

Principal Investigator

Yanagida Tsutomu  東京大学, カブリ数物連携宇宙研究機構, 特任教授 (10125677)

Co-Investigator(Kenkyū-buntansha) 松本 重貴  東京大学, カブリ数物連携宇宙研究機構, 准教授 (00451625)
濱口 幸一  東京大学, 大学院理学系研究科(理学部), 准教授 (80431899)
末松 大二郎  金沢大学, 数物科学系, 教授 (90206384)
中山 和則  東京大学, 大学院理学系研究科(理学部), 助教 (90596652)
Research Collaborator IBE masahiro  東京大学, 宇宙線研究所, 准教授 (50599008)
Project Period (FY) 2014-07-10 – 2019-03-31
Keywordsニュートリノ / 宇宙のバリオン数非対称性 / 暗黒物質 / 標準模型を超える物理 / レプトジェネシス
Outline of Final Research Achievements

The puzzles of (a) the small neutrino mass, (b) the baryon asymmetry of the universe, and (c) the dark matter are the keys to reveal the history of the universe. In this theoretical research project, which is one of the projects in the Grant-in-Aid for Scientific Research on Innovative Areas "Revealing the history of the universe with underground particle and nuclear research", we have worked on various topics related to above three puzzles, and published 141 papers and gave 104 talks in conferences and workshops. For example, we have given predictions on the neutrino physics, including the neutrinoless double beta decay that is searched for in the research projects A01 and A02 in this Innovative Area. We have also studied various phenomenological aspects on dark matter and clarified the roles of the direct search experiments conducted by the research projects B01 and B02 in this Innovative Area.

Free Research Field

素粒子理論

Academic Significance and Societal Importance of the Research Achievements

素粒子模型構築や宇宙論の観点からニュートリノ物理への予言を与える研究をいくつか行い、ニュートリノを伴わないダブルベータ崩壊への予言を与えるなどした。またWIMP暗黒物質に関して特定の素粒子模型に依らない包括的な研究を行い、特に地下実験での直接探索の重要性や他の探索との相補的関係を明らかにした。その他、本計画研究の対象であるニュートリノ質量、宇宙のバリオン数非対称性、暗黒物質の3つの謎に関連した幅広い研究を多様な角度から行い、数多くの業績を挙げた。また、本科研費で雇用した外国人博士研究員が出身国でテニュアトラック職を得るなど、国際交流・若手育成にも貢献した。

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Published: 2020-03-30  

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