標準ヒッグス結合のズレからテラスケールへ

• Project Area: Particles Physics opening up the Tera-scale horizon using LHC
• Project/Area Number: 26104704
• 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: Kyoto University
• Principal Investigator: 津村 浩二 京都大学, 理学(系)研究科(研究院), 助教 (40648101)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000); Fiscal Year 2014: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
• Keywords: ヒッグスボソン / ベクターボソン散乱 / ヒッグス / テラスケール / 素粒子標準模型

Outline of Annual Research Achievements

2015年のLHC実験では十分なデータが得られなかったため, ヒッグスボソン結合の実験精度はあまり変わっていない. 一方で, 種々の異常なイベントが報告された. 特に本研究課題に関係するものとしては, 2TeV程度の質量を持つファットジェット対に崩壊する新粒子の可能性があった. この報告に即応して, 付加的なスカラーボソンによる新粒子の解釈を提唱した. 実験データを解釈するには新粒子もヒッグス機構に寄与することが必要であり, その結果として付加的なスカラーボソンと既に発見されているヒッグスボソンの相互作用の間には和則が成り立つ. そのため, 新粒子の相互作用はヒッグスボソンに対して実験的に許されている結合定数のズレを用いてその許される結合が決まる. したがって, 付加的なスカラーボソンでの解釈は強く制限される. LHC実験におけるさまざまな制限に加えてフレーバー実験による制限も調べ可能なシナリオを提示した.

Research Progress Status

27年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

27年度が最終年度であるため、記入しない。

Research Products

• [Journal Article] Survey of Higgs interpretations of the diboson excesses (2015)
  • Author(s): Yuji Omura, Kazuhiro Tobe, Koji Tsumura
  • Journal Title: Physical Review D Volume: 92 Issue: 5 Pages: 055015-055015
  • DOI: 10.1103/physrevd.92.055015
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Landau pole in the Standard Model with weakly interacting scalar fields (2015)
  • Author(s): Yuta Hamada, Kiyoharu Kawana, Koji Tsumura
  • Journal Title: Physics Letters B Volume: 747 Pages: 238-238
  • DOI: 10.1016/j.physletb.2015.05.072
  • NAID: 120005670905
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Does unitaryity imply the finitess of electroweak oblique corrections at one loop? Constraining extra neutrall Higgs bosons (2015)
  • Author(s): R.Nagai, M.Tanabashi, K.Tsumura
  • Journal Title: Phys.Rev.D Volume: 91 Issue: 3 Pages: 034030-034030
  • DOI: 10.1103/physrevd.91.034030
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Properties and searches of the exotic neutral Higgs bosons in the Georgi-Machacek model (2015)
  • Author(s): Cheng-Wei Chiang, Koji Tsumura
  • Journal Title: Journal of High Energy Physics Volume: 04 Issue: 4 Pages: 1-20
  • DOI: 10.1007/jhep04(2015)113
  • NAID: 120005749919
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Fingerprinting nonminimal Higgs sectors (2014)
  • Author(s): Shinya Kanemura, Koji Tsumura, Kei Yagyu, and Hiroshi Yokoya
  • Journal Title: Physical Review Volume: D 90 Issue: 7 Pages: 075001-075001
  • DOI: 10.1103/physrevd.90.075001
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] Can the New Physics Models be Valid up to the Planck scale? (2016)
  • Author(s): Koji Tsumura
  • Organizer: The NTU-Kyoto Workshop
  • Place of Presentation: National Taiwan University, Taipei, Taiwan
  • Year and Date: 2016-03-27
  • Int'l Joint Research / Invited
• [Presentation] VVレゾナンスの拡張ヒッグス模型による解釈 (2015)
  • Author(s): 津村浩二
  • Organizer: 新学術領域研究会 テラスケール2015 先端加速器LHCが切り拓くテラスケールの素粒子物理学
  • Place of Presentation: 東京工業大学, 東京都目黒区
  • Year and Date: 2015-12-21
  • Invited
• [Presentation] Scalar Interpretations of the Diboson Excesses (2015)
  • Author(s): Koji Tsumura
  • Organizer: Diboson Theory Workshop (Diboson/Multilepton Subgroup Meeting)
  • Place of Presentation: CERN, Geneve, Switzerland
  • Year and Date: 2015-11-15
  • Int'l Joint Research / Invited
• [Presentation] Landau Pole from Scalar N-plets (2015)
  • Author(s): Koji Tsumura
  • Organizer: KIAS-CFHEP Workshop and the 5th KIAS Workshop on Particle Physics and Cosmology
  • Place of Presentation: Korea Institute for Advanced Study, Seoul, South Korea
  • Year and Date: 2015-11-09
  • Int'l Joint Research / Invited
• [Presentation] Prospects of LHC Run II (2015)
  • Author(s): Koji Tsumura
  • Organizer: Developments in String Theory and Quantum Field Theory
  • Place of Presentation: Yukawa Institute for Theoretical Physics, Kyoto, Japan
  • Year and Date: 2015-11-09
  • Int'l Joint Research / Invited
• [Presentation] ヒッグスセクターはどこまで検証されたか？ (2015)
  • Author(s): 津村浩二
  • Organizer: 関西地域セミナー 2015
  • Place of Presentation: 京都大学基礎物理学研究所
  • Year and Date: 2015-07-11
  • Invited
• [Presentation] Unitarity and Electroweak Oblique Corrections (2015)
  • Author(s): Koji Tsumura
  • Organizer: CosKASI Dark Matter Workshop 2015
  • Place of Presentation: Korea Astronomy and Space Science Institute, Daejeon, South Korea
  • Year and Date: 2015-06-09
  • Int'l Joint Research / Invited
• [Presentation] Unitarity and Electroweak Oblique Corrections (2015)
  • Author(s): Koji Tsumura
  • Organizer: The 2nd Joint Kyoto-NTU High Energy Theory Workshop
  • Place of Presentation: 國立臺灣大學, 台北市, 台湾
  • Year and Date: 2015-03-27 – 2015-03-29
  • Invited
• [Presentation] Georgi-Machacek模型の付加的ヒッグスへの制限 (2015)
  • Author(s): 津村浩二
  • Organizer: 日本物理学会第70回年次大会
  • Place of Presentation: 早稲田大学, 東京都
  • Year and Date: 2015-03-21 – 2015-03-24
• [Presentation] Fingerprinting Non-Minimal Higgs Sector (2014)
  • Author(s): Koji Tsumura
  • Organizer: Second KIAS-NCTS Joint Workshop
  • Place of Presentation: 國立臺灣大學, 台北市, 台湾
  • Year and Date: 2014-12-26 – 2014-12-28
  • Invited
• [Presentation] What if K_W \neq K_Z ? -- Zero Higgs Doublet Model -- (2014)
  • Author(s): Koji Tsumura
  • Organizer: The 2014 International Workshop on Future Linear Colliders (LCWS14)
  • Place of Presentation: Hyatt Regency and Crowne Plaza, ベオグラード, セルビア
  • Year and Date: 2014-10-06 – 2014-10-10
• [Presentation] Higgs物理でHL-LHCに期待すること (2014)
  • Author(s): 津村浩二
  • Organizer: 日本物理学会 2014年 秋季大会 素粒子実験-素粒子論領域合同シンポジウム
  • Place of Presentation: 佐賀大学, 佐賀市
  • Year and Date: 2014-09-18 – 2014-09-21
  • Invited
• [Presentation] From the Higgs Coupling to New Physics Beyond the SM (2014)
  • Author(s): Koji Tsumura
  • Organizer: Progress in String Theory and Particle Phenomenology
  • Place of Presentation: 京都大学, 京都市
  • Year and Date: 2014-09-09 – 2014-09-11
  • Invited
• [Presentation] Physics at ILC : A Theory Perspective (2014)
  • Author(s): Koji Tsumura
  • Organizer: ILD Meeting
  • Place of Presentation: 水沢グランドホテル（奥州市）
  • Year and Date: 2014-09-06 – 2014-09-09
  • Invited
• [Presentation] Zero Higgs Doublet Model (2014)
  • Author(s): Koji Tsumura
  • Organizer: Summer Institute 2014
  • Place of Presentation: FUJI Calm（富士吉田市）
  • Year and Date: 2014-08-21 – 2014-08-28
• [Remarks]
  • URL: http://www2.yukawa.kyoto-u.ac.jp/~koji.tsumura/research.html
• [Remarks] 津村浩二の研究について
  • URL: http://www-gauge.scphys.kyoto-u.ac.jp/~ko2/research.html
• [Funded Workshop] 素粒子物理学の進展 2015 (2015)
  • Place of Presentation: 基礎物理学研究所
  • Year and Date: 2015-09-14