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Nonperturbative QCD dynamics in muon anomalous magnetic moment

Research Project

Project/Area Number 16K05317
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Particle/Nuclear/Cosmic ray/Astro physics
Research InstitutionNagoya University

Principal Investigator

Hayakawa Masashi  名古屋大学, 理学研究科, 准教授 (20270556)

Project Period (FY) 2016-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywordsミュー粒子 / 異常磁気モーメント / QCD / 格子ゲージ理論 / 数値シミュレーション / ミュー粒子異常磁気能率 / ミュー粒子の異常磁気能率 / 光-光散乱振幅 / 異常磁気能率 / 光光散乱 / 光-光産卵振幅 / 素粒子論
Outline of Final Research Achievements

The anomalous magnetic dipole moment of the muon, so called the muon g-2, is one of the quantities that can be predicted from any renormalizable model of elementary particles, such as the Standard Model. In the Standard Model, proton and all other nucleons are described by QCD including quarks and gluons, the gauge theory of strong interactions. In order to realize accurate comparison between theory and experiment of muon g-2, it is indispensable to understand the effect of QCD on muon g-2 qualitatively. This research presents the first result for the QCD effect which requires purely theoretical analysis by the numerical simulation. This helps to remove the theoretical uncertainty whose size has not been known in the theoretical prediction on the muon g-2 from the Standard Model.

Academic Significance and Societal Importance of the Research Achievements

ミュー粒子異常磁気能率(muon g-2)の実験による測定値と既知の素粒子構造による理論値の間には「ずれ」が窺われる。
理論値はQCD(陽子などの原子核を形成する力の理論)が光-光散乱振幅を介してmuon g-2に及ぼす効果(HLbLの寄与)を含む。QCDのモデル計算でしか計算できなかったHLbLの寄与の大きさはずれと同程度であるため、ずれが新素粒子構造の存在に由来する点を断定できなかった。
本研究はQCDによるHLbLの寄与の理解を世界に先駆けて実現してこの難点を解決した。改定後の理論値は2021年に発表されたmuon g-2の次世代実験の測定値と比較され、未知の素粒子構造の存在を示唆した。

Report

(7 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (15 results)

All 2020 2017 2016 Other

All Int'l Joint Research (8 results) Journal Article (4 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 4 results,  Open Access: 4 results,  Acknowledgement Compliant: 1 results) Presentation (3 results) (of which Int'l Joint Research: 2 results,  Invited: 3 results)

  • [Int'l Joint Research] ブルックヘブン国立研究所/コロンビア大学/コネチカット大学(米国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] ローゼンベルグ大学(ドイツ)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] ブルックヘブン国立研究所/コロンビア大学/コネチカット大学(米国)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] ローゼンベルグ大学(ドイツ)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] ブルックヘブン国立研究所/コロンビア大学/コネチカット大学(米国)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] ローゼンベルク大学(ドイツ)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] Connecticut University/Brookhaven National Laboratory/Columbia University(米国)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] Columbia University/Connecticut University/Brookhaven National Laboratory(米国)

    • Related Report
      2017 Research-status Report
  • [Journal Article] Hadronic Light-by-Light Scattering Contribution to the Muon Anomalous Magnetic Moment from Lattice QCD2020

    • Author(s)
      T. Blum、N. Christ、M. Hayakawa、T. Izubuchi、L. Jin、C. Jung and C. Lehner
    • Journal Title

      Physical Review Letters

      Volume: 124 Issue: 13 Pages: 132002-132002

    • DOI

      10.1103/physrevlett.124.132002

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] The anomalous magnetic moment of the muon in the Standard Model2020

    • Author(s)
      T.Aoyama and et.al.
    • Journal Title

      Physics Reports

      Volume: 887 Pages: 1-166

    • DOI

      10.1016/j.physrep.2020.07.006

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Using infinite volume, continuum QED and lattice QCD for the hadronic light-by-light contribution to the muon anomalous magnetic moment2017

    • Author(s)
      T.Blum, N.Christ, M.Hayakawa, T.Izubuchi, L.Jin, C.Jung and C.Lehner
    • Journal Title

      Physical Review D

      Volume: 96 Issue: 3 Pages: 034515-034515

    • DOI

      10.1103/physrevd.96.034515

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Connected and Leading Disconnected Hadronic Light-by-Light Contribution to the Muon Anomalous Magnetic Moment with a Physical Pion Mass2017

    • Author(s)
      T.Blum, N.Christ, M.Hayakawa, T~Izubuchi, L.Jin, C.Jung and C.Lehner
    • Journal Title

      Physical Review Letters

      Volume: 118 Issue: 2 Pages: 020051-020056

    • DOI

      10.1103/physrevlett.118.022005

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Presentation] Hadronic light-by-light scattering contribution to the muon g-2 from Lattice QCD2016

    • Author(s)
      早川雅司
    • Organizer
      The 2nd Durham-KEK-KIPMU-KIAS Joint Workshop
    • Place of Presentation
      KIAS, Seoul
    • Year and Date
      2016-10-24
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Is the theoretical prediction for the muon g-2 really correct ?2016

    • Author(s)
      早川雅司
    • Organizer
      PPP2016
    • Place of Presentation
      基礎物理学研究所
    • Year and Date
      2016-09-05
    • Related Report
      2016 Research-status Report
    • Invited
  • [Presentation] Standard model prediction for the muon g-2 : QCD and QED contributions2016

    • Author(s)
      早川雅司
    • Organizer
      The 1st KEK-KIAS-NCTS Joint Workshop on Particle Physics Phenomenology
    • Place of Presentation
      National Center for Theoretical Sciences (NCTS), Taiwan
    • Year and Date
      2016-05-26
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited

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Published: 2016-04-21   Modified: 2023-01-30  

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