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Search for lepton-flavor violation using new physics topology

Research Project

Project/Area Number 18K03685
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 15020:Experimental studies related to particle-, nuclear-, cosmic ray and astro-physics
Research InstitutionHigh Energy Accelerator Research Organization

Principal Investigator

Tsuno Soshi  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, 研究機関講師 (30451834)

Project Period (FY) 2018-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywordsヒッグス粒子 / ニュートリノ振動 / レプトンフレーバーの破れ / LHC実験 / フレーバー物理 / タウレプトン / ATLAS実験 / アトラス実験 / フレーバー / アトラス
Outline of Final Research Achievements

In the Standard Model of the particle physics, the lepton-flavor violation is strongly suppressed, while the recent experimental results from the neutrino oscillation experiment sugests the flavor-violation is possible as the sizeable order. This is known as a puzzle of the flavor physics. This study propose the new physics process with the lepton-flavor violation through the interaction with the Higgs boson. Such lepton-flavor violating process is only possible at the higher order perturbative effect. The theoretical calculation program has been developed.

Academic Significance and Societal Importance of the Research Achievements

現在の素粒子標準理論に於いて、フレーバー混合が強く抑制されるのは、場の理論に於けるユニタリー条件からの要請であり、理論の根幹を為す部分である。唯一、ヒッグス粒子のみが、このユニタリー条件から解放される可能性があるため、その検証は、学術的意義に極めて重要である。素粒子標準理論では、ヒッグス粒子は、粒子種を区別することができる唯一の粒子であるため、ヒッグス粒子を理解することは、なぜ、我々の宇宙がこれほど多様性に満ちているのかを探る手掛かりとなる。

Report

(6 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (15 results)

All 2022 2021 2020 2019 Other

All Int'l Joint Research (3 results) Journal Article (4 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 4 results,  Open Access: 4 results) Presentation (8 results) (of which Int'l Joint Research: 2 results,  Invited: 2 results)

  • [Int'l Joint Research] CERN(スイス)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] CERN(スイス)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] CERN(スイス)

    • Related Report
      2018 Research-status Report
  • [Journal Article] Measuring lepton flavor violation at the LHC2022

    • Author(s)
      Asai K.、Fujimoto J.、Kaneta K.、Kurihara Y.、Tsuno S.
    • Journal Title

      Physical Review D

      Volume: 106 Issue: 7

    • DOI

      10.1103/physrevd.106.075014

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Search for Beyond SM Higgs Bosons2020

    • Author(s)
      Tsuno S.、on behalf of the ATLAS and CMS Collaborations
    • Journal Title

      World Scientific

      Volume: 28 Pages: 23-36

    • DOI

      10.1142/9789811207402_0002

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Test of CP invariance in vector-boson fusion production of the Higgs boson in the H?→?ττ channel in proton?proton collisions at s=13TeV with the ATLAS detector2020

    • Author(s)
      Aad G. et.al. ATLAS Collaboration
    • Journal Title

      Physics Letters B

      Volume: 805 Pages: 135426-135426

    • DOI

      10.1016/j.physletb.2020.135426

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Cross-section measurements of the Higgs boson decaying into a pair of τ-leptons in proton-proton collisions at s=13??TeV with the ATLAS detector2019

    • Author(s)
      ATLAS Collaboration
    • Journal Title

      Physical Review D

      Volume: 99 Issue: 7 Pages: 072001-072001

    • DOI

      10.1103/physrevd.99.072001

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] LHC-ATLAS実験における荷電レプトンフレーバーを破るウィークボソン散乱過程探索の背景事象推定2022

    • Author(s)
      浅井香奈江, 江成祐二, 奥村恭幸, 金田邦雄, 栗原良将, 河野能知, 津野総司, 廣瀬茂輝, 藤本順平, 増渕達也, 和田冴
    • Organizer
      日本物理学会第77回年次大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] LHC-ATLAS実験における荷電レプトンフレーバーを破るウィークボソン散乱過程探索の背景事象推定2022

    • Author(s)
      浅井香奈江
    • Organizer
      日本物理学会 第77回年次大会
    • Related Report
      2021 Research-status Report
  • [Presentation] LHC-ATLAS実験における荷電レプトンフレーバーを破るウィークボソン散乱過程の多変量解析を用いた探索感度評価2021

    • Author(s)
      和田冴
    • Organizer
      日本物理学会 2021年秋季大会
    • Related Report
      2021 Research-status Report
  • [Presentation] LHC-ATLAS実験における荷電レプトンフレーバーを破るウィークボソン散乱過程の探索感度の最適化2021

    • Author(s)
      浅井香奈江
    • Organizer
      日本物理学会 第76回年次大会
    • Related Report
      2020 Research-status Report
  • [Presentation] Operational Experience and Performance with the ATLAS Pixel detector at the Large Hadron Collider at CERN2020

    • Author(s)
      Soshi Tsuno
    • Organizer
      40th International Conference on High Energy Physics
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] LHC-ATLAS実験における荷電レプトンフレーバーを破るウィークボソン散乱過程の探索感度の評価と改善に向けて2020

    • Author(s)
      浅井香奈江
    • Organizer
      日本物理学会第75回年次大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Combined Higgs boson measurements at the ATLAS experiment2019

    • Author(s)
      津野総司
    • Organizer
      XXVII International Workshop on Deep Inelastic Scattering and Related Subjects
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] LHC-ATLAS実験Run2におけるPixel検出器のパフォーマンスに関する総括2019

    • Author(s)
      津野総司
    • Organizer
      日本物理学会第74回年次大会
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2024-01-30  

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