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Novel approach to high-energy precision physics by refinement of perturbative QCD

Research Project

Project/Area Number 20K03923
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 15010:Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics
Research InstitutionTohoku University

Principal Investigator

Sumino Yukinari  東北大学, 理学研究科, 准教授 (80260412)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywordsリノーマロン / 摂動計算 / 物理基礎定数 / QCD / 摂動QCD / ループ計算 / 基礎物理定数 / 小林益川行列 / 高精度計算 / OPE / 高次補正 / 物理定数 / 演算子展開
Outline of Research at the Start

素粒子物理学の最先端は高精度実験の時代に入り、ヒッグス粒子の性質の詳しい解明や新しい素粒子物理法則の発見・解明のために、強い相互作用(QCD)のより精密な理論予言が要請されている。強い相互作用は理論的な予言が難しく、なかなか予言精度を上げることが難しかった。理論精度を質的に向上させるための新しい方法を開発する。また応用として幾つかの重要な物理量を高精度で予言し、基礎物理定数を高精度で決定する。

Outline of Final Research Achievements

In recent years, it is becoming more important to subtract renormalons efficiently from perturbative calculations, in order to achieve high precision QCD calculations. A renormalon subtraction method, which I originally developed for the QCD potential, was extended for application to general observables, where I developed and proposed the FTRS method and DSRS method (with collaborators). In particular, we proposed a new concept that there exists a dual space for any observable, in which renormalons are suppressed. I expect that these methods will become the basis for high-precision theoretical calculations based on perturbative QCD and OPE in near future. Also, by applying the DSRS method, we determined the Kobayashi-Maskawa matrix element |Vcb| from the OPE of the B meson semileptonic decay width.

Academic Significance and Societal Importance of the Research Achievements

現在の高エネルギー物理学の最先端では、QCDによる理論計算の高精度化が必要不可欠となっている。それは、様々な高エネルギー現象の理論計算において、その精度を定めているのはQCDの理論計算の部分だからである。また近年は、QCDの詳細な研究を通じて(素粒子理論の土台である)場の量子論をより深いレベルで理解しようという方向性も重視されている。今回開発したリノーマロン除去法は、これらの目的を実現するための理論的な礎を与えると期待される。またその応用例として行なった基礎物理定数|Vcb|の決定は、かねてより問題となっていた「Vcbパズル」に関して、理論計算の信頼性の検証を与えた。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (11 results)

All 2023 2022 2021 2020

All Journal Article (5 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 5 results,  Open Access: 5 results) Presentation (6 results) (of which Int'l Joint Research: 3 results,  Invited: 5 results)

  • [Journal Article] Review of Particle Physics2022

    • Author(s)
      Workman R. L. et al., Particle Data Group、
    • Journal Title

      Progress of Theoretical and Experimental Physics

      Volume: 2022 Issue: 8 Pages: 1-2270

    • DOI

      10.1093/ptep/ptac097

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Renormalon subtraction in OPE using Fourier transform: formulation and application to various observables2022

    • Author(s)
      Yuuki Hayashi, Yukinari Sumino, Hiromasa Takaura
    • Journal Title

      Journal of High Energy Physics

      Volume: 16 Issue: 2

    • DOI

      10.1007/jhep02(2022)016

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Determination of |V_cb| using N3LO perturbative corrections to Γ(B→Xclν) and 1S masses2022

    • Author(s)
      Yuuki Hayashi, Yukinari Sumino, Hiromasa Takaura
    • Journal Title

      Physics Letters B

      Volume: 829 Pages: 137068-137068

    • DOI

      10.1016/j.physletb.2022.137068

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Review of Particle Physics2020

    • Author(s)
      P.A. Zyla et al. Particle Data Group Collaboration
    • Journal Title

      PTEP

      Volume: 8 Issue: 8

    • DOI

      10.1093/ptep/ptaa104

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] On renormalons of static QCD potential at u = 1/2 and 3/22020

    • Author(s)
      Y. Sumino, H. Takaura
    • Journal Title

      Journal of High Energy Physics

      Volume: 05 Issue: 5 Pages: 116-116

    • DOI

      10.1007/jhep05(2020)116

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Renormalon subtraction in |Vcb| determination2023

    • Author(s)
      Yukinari Sumino
    • Organizer
      KEK-FF
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Renormalons in QCD2022

    • Author(s)
      Yukinari Sumino
    • Organizer
      KIT Particle Physics Colloquium
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Perturbative calculations2021

    • Author(s)
      Yukinari Sumino
    • Organizer
      Bad Honnef Physics School
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] EFT for Heavy Quarkonium2021

    • Author(s)
      隅野行成
    • Organizer
      第2回EFT勉強会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] New method for renormalon subtraction using Fourier transform2021

    • Author(s)
      Yuuki Hayashi
    • Organizer
      QWG2021
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Top and QCD2020

    • Author(s)
      Yukinari Sumino
    • Organizer
      ILC合宿
    • Related Report
      2020 Research-status Report
    • Invited

URL: 

Published: 2020-04-28   Modified: 2024-01-30  

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