Connection between Terascale New Physics and the Evolution of the Early Universe

• Project Area: Why does the Universe accelerate? - Exhaustive study and challenge for the future -
• Project/Area Number: 16H01093
• Research Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
• Allocation Type: Single-year Grants
• Review Section: Science and Engineering
• Research Institution: University of Toyama
• Principal Investigator: 柿崎 充 富山大学, 大学院理工学研究部(理学), 准教授 (90612622)
• Project Period (FY): 2016-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000); Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
• Keywords: 素粒子論 / 宇宙論 / 重力波 / ヒッグス粒子 / 暗黒物質 / バリオン数非対称性

Outline of Annual Research Achievements

本研究では、素粒子物理学の標準理論を超えた新しいテラスケール模型と初期宇宙の進化シナリオの間のつながりに関して研究を行ってきた。具体的には、これらのテラスケール模型の存在を仮定したときに予言される物理量の間の相関関係を調べてきた。また稼働中のラージ・ハドロン・コライダー (LHC) 、計画中の国際リニアコライダー (ILC) に代表される各種高エネルギー物理学実験や、暗黒物質検出実験、重力波干渉計等の宇宙観測で得られる実験データと比較し、多角的な観点から模型を解析することにより、テラスケールで実現されている真の物理理論に迫ることを目指してきた。
本年度は主として、宇宙のバリオン数非対称性を説明する有力なシナリオの一つである電弱バリオン数生成シナリオの謎に迫ることを念頭に起き、強い１次的電弱相転移を実現する様々なテラスケール模型を取り上げ、この相転移から発生する重力波に関する研究を行った。まず、強い１次的電弱相転移を実現し、且つ暗黒物質候補粒子も合わせ持つU(1)Xゲージ模型の現象論的解析を行った。そして、現在のLHC実験や暗黒物質直接検出実験からの制限が非常に強く、将来の宇宙空間で行われる重力波観測干渉計LISA及び DECIGOで観測できるほど重力波の振幅が大きくなる可能性は低いことを指摘した。また、これらの将来の重力波観測を使ったテラスケール模型のパラメータの決定精度を調べる研究も行った。その結果、重力波観測により決定できるパラメータの精度は、将来の高輝度 LHC や ILC を使ったパラメータの決定精度に比肩し、重力波観測と加速器実験はテラスケール模型を探索する上で相補的な役割を果たせることがわかった。

Research Progress Status

29年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

29年度が最終年度であるため、記入しない。

Research Products

• [Int'l Joint Research] 韓国高等科学院(韓国)
• [Int'l Joint Research] 韓国高等科学院(韓国)
• [Journal Article] Gravitational waves from first order electroweak phase transition in models with the U(1)_X gauge symmetry (2017)
  • Author(s): K. Hashino, M. Kakizaki, S. Kanemura, P. Ko and T. Matsui
  • Journal Title: arXiv.org Volume: -
  • Open Access / Int'l Joint Research
• [Journal Article] Report by the Committee on the Scientific Case of the ILC Operating at 250 GeV as a Higgs Factory (2017)
  • Author(s): S. Asai, J. Tanaka, Y. Ushiroda, M. Nakao, J. Tian, S. Kanemura, S. Matsumoto, S. Shirai, M. Endo and M. Kakizaki
  • Journal Title: arXiv.org Volume: -
  • Open Access
• [Journal Article] Phenomenological signatures of mixed complex scalar WIMP dark matter (2017)
  • Author(s): Mitsuru Kakizaki, Akiteru Santa, and Osamu Seto
  • Journal Title: International Journal of Modern Physics A Volume: 32 Issue: 10 Pages: 1750038-1750038
  • DOI: 10.1142/s0217751x17500385
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Gravitational waves and Higgs boson couplings for exploring first order phase transition in the model with a singlet scalar field (2016)
  • Author(s): Katsuya Hashino, Mitsuru Kakizaki, Shinya Kanemura, Pyungwon Ko, and Toshinori Matsui
  • Journal Title: Physics Letters B Volume: 766 Pages: 49-54
  • DOI: 10.1016/j.physletb.2016.12.052
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Synergy between measurements of gravitational waves and the triple-Higgs coupling in probing the first-order electroweak phase transition (2016)
  • Author(s): Katsuya Hashino, Mitsuru Kakizaki, Shinya Kanemura, and Toshinori Matsui
  • Journal Title: Physical Review D Volume: 94 Issue: 1 Pages: 015005-015005
  • DOI: 10.1103/physrevd.94.015005
  • Peer Reviewed / Open Access
• [Presentation] Relic abundance of the lightest Kaluza-Klein particle in phenomenological universal extra dimension models (2018)
  • Author(s): M. Kakizaki
  • Organizer: The 3rd Winter Toyama Mini-Workshop on Particle Physics and Cosmology "Basis of the Universe with Revolutionary Ideas 2018
  • Int'l Joint Research
• [Presentation] Abundance of the lightest Kaluza-Klein particle in phenomenological universal extra dimension models (2018)
  • Author(s): M. Kakizaki
  • Organizer: Why does the Universe accelerate?-Exhaustive study and challenge for the future
  • Int'l Joint Research
• [Presentation] 重力波スペクトル及び加速器実験に基づくNMSSMの検証可能性 (2018)
  • Author(s): 池田一毅, 柿崎充, 兼村晋哉, 端野克哉
  • Organizer: 日本物理学会 第73回年次大会
• [Presentation] 端野克哉，柿崎 充，兼村晋哉，Pyungwon Ko，松井俊憲 (2018)
  • Author(s): 電弱一次相転移由来の重力波と加速器によるU(1)_Xゲージ対称性に基づく模型の検証
  • Organizer: 日本物理学会 第73回年次大会
• [Presentation] Probing first order phase transition by the combination of gravitational waves and Higgs couplings (2018)
  • Author(s): K. Hashino, M. Kakizaki, S. Kanemura, P. Ko and T. Matsui
  • Organizer: The 3rd Winter Toyama Mini-Workshop on Particle Physics and Cosmology "Basis of the Universe with Revolutionary Ideas 2018
• [Presentation] Probing physics behind the electroweak symmetry breaking at future gravitational wave interferometers and future collider experiments (2017)
  • Author(s): Mitsuru Kakizaki
  • Organizer: Why does the Universe accelerate?-Exhaustive study and challenge for the future
  • Place of Presentation: KEK, Japan
  • Year and Date: 2017-03-08
  • Int'l Joint Research
• [Presentation] Probing physics behind the electroweak symmetry breaking at future gravitational wave interferometers and future collider experiments (2017)
  • Author(s): Mitsuru Kakizaki
  • Organizer: The 3rd Toyama International Workshop on "Higgs as a Probe of New Physics" (HPNP2017)
  • Place of Presentation: University of Toyama, Japan
  • Year and Date: 2017-03-03
  • Int'l Joint Research
• [Presentation] ヒッグスと重力波 (2017)
  • Author(s): 柿崎充
  • Organizer: 新テラスケール研究会
  • Invited
• [Presentation] Indirect reach of heavy MSSM Higgs bosons by precision measurements at future lepton colliders (2016)
  • Author(s): Mitsuru Kakizaki
  • Organizer: The International Workshop on Future Linear Colliders (LCWS2016)
  • Place of Presentation: Morioka, Japan
  • Year and Date: 2016-12-06
  • Int'l Joint Research
• [Presentation] Probing physics behind the electroweak symmetry breaking at future gravitational wave interferometers and future collider experiments (2016)
  • Author(s): Mitsuru Kakizaki
  • Organizer: The 13th International Symposium on Cosmology and Particle Astrophysics (CosPA 2016)
  • Place of Presentation: University of Sydney, Australia
  • Year and Date: 2016-11-28
  • Int'l Joint Research
• [Presentation] Probing physics behind the electroweak symmetry breaking at future gravitational wave interferometers and future collider experiments (2016)
  • Author(s): Mitsuru Kakizaki
  • Organizer: The 26th Workshop on General Relativity and Gravitation in Japan
  • Place of Presentation: Osaka City University, Japan
  • Year and Date: 2016-10-27
  • Int'l Joint Research
• [Presentation] Gravitational waves and Higgs boson couplings for exploring first order phase transition in the model with a singlet scalar field (2016)
  • Author(s): 柿崎 充
  • Organizer: 新ヒッグス勉強会第19回定例会
  • Place of Presentation: 富山大学
  • Year and Date: 2016-10-15
• [Presentation] ヒッグス粒子と暗黒物質の性質から探る新物理理論 (2016)
  • Author(s): 柿崎 充
  • Organizer: Toyama Science GALA 2016
  • Place of Presentation: 富山大学
  • Year and Date: 2016-09-30
• [Presentation] Relic Abundance of the Lightest Kaluza-Klein Particle in Universal Extra Dimension Models (2016)
  • Author(s): 柿崎 充
  • Organizer: Summer institute 2016
  • Place of Presentation: Xi-Tou, Taiwan
  • Year and Date: 2016-08-19
  • Int'l Joint Research
• [Presentation] 標準理論を超えた新物理 (2016)
  • Author(s): 柿崎 充
  • Organizer: 加速器・物理合同 ILC 夏の合宿2016
  • Place of Presentation: 一関市
  • Year and Date: 2016-07-25
  • Invited
• [Presentation] Probing physics behind the EWSB at future GW and collider experiments (2016)
  • Author(s): 柿崎 充
  • Organizer: 新ヒッグス勉強会第17回定例会
  • Place of Presentation: 富山大学
  • Year and Date: 2016-05-08
• [Remarks] 富山大学 理論物理学研究室
  • URL: http://www3.u-toyama.ac.jp/theory/
• [Remarks] 富山大学 研究者総覧
  • URL: http://evaweb.u-toyama.ac.jp/search?m=home&l=ja
• [Remarks] 富山大学研究者総覧
  • URL: http://evaweb.u-toyama.ac.jp/html/88_ja.html
• [Remarks] 富山大学理論物理学研究室
  • URL: http://www3.u-toyama.ac.jp/theory/
• [Funded Workshop] The 3rd Winter Toyama Mini-Workshop on Particle Physics and Cosmology "Basis of the Universe with Revolutionary Ideas 2018 (2018)