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Exploring new physics in string theory from numerical analysis in open string field theory

Research Project

Project/Area Number 20K03933
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 InstitutionTokyo University of Science, Yamaguchi

Principal Investigator

Kishimoto Isao  山陽小野田市立山口東京理科大学, 共通教育センター, 教授 (60399433)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2022: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2021: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords開弦の場の理論 / レベル切断近似 / 数値解周りの理論 / 単位弦場に基づく解析解 / 二重ブレーン / a-ゲージ / スペクトラム / 質量スペクトラム / 数値解
Outline of Research at the Start

ボソン的開弦の場の理論において、様々なゲージ(1パラメータの入ったa-ゲージ)条件のもとで運動方程式をレベル切断近似を用いて数値的に解き、従来よく調べられてきたタキオン真空解以外の非自明な解を求め、その性質を具体的に詳しく調べて物理的解釈を与える。
このような数値計算を遂行することにより全く新しい解を発見し、弦理論の非摂動的定式化の一つである弦の場の理論を指導原理として、新たな物理現象を探る。

Outline of Final Research Achievements

Superstring theory is one of the most likely candidates for the theory of everything and string field theory is one of its nonperturbative formulations. Here, we studied numerical solutions in the bosonic open string field theory. In particular, using the level truncation approximation, we extended numerical solutions to those around the identity-based solutions or in the a-gauges, conducted numerical analysis on the spectrum in the theory around the numerical double brane solution on the perturbative vacuum and the single brane solution on the nonperturbative vacuum, and clarified the consistency with earlier interpretations.

Academic Significance and Societal Importance of the Research Achievements

超弦理論の非摂動的定式化の一つである弦の場の理論が実際の物理現象の記述に役立つことを示すには、具体的な計算を実行する必要がある。本研究で、ボソン的開弦の場の理論の枠組みで実際に数値計算を行い、既知の数値解を拡張したり、数値解周りのスペクトラムを求めたりしたことでその有効性を示すことができた。特に、非摂動真空を表す単位弦場に基づく解に関する本研究の成果はこれまでの物理的解釈を正当化することになった。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (15 results)

All 2024 2023 2022 2021 2020

All Journal Article (9 results) (of which Peer Reviewed: 6 results,  Open Access: 7 results) Presentation (6 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Two-point closed string amplitudes in the BRST formalism2024

    • Author(s)
      Kishimoto Isao、Seki Shigenori、Takahashi Tomohiko
    • Journal Title

      Physics Letters B

      Volume: 853 Pages: 138657-138657

    • DOI

      10.1016/j.physletb.2024.138657

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Closed string vertex operators with various ghost number2024

    • Author(s)
      Kishimoto Isao、Kouga Mako、Seki Shigenori、Takahashi Tomohiko
    • Journal Title

      Nuclear Physics B

      Volume: 1004 Pages: 116549-116549

    • DOI

      10.1016/j.nuclphysb.2024.116549

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] On the spectrum around numerical solutions in Siegel gauge in open string field theory2023

    • Author(s)
      Kishimoto Isao
    • Journal Title

      Progress of Theoretical and Experimental Physics

      Volume: 2023 Issue: 10

    • DOI

      10.1093/ptep/ptad123

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 開弦の場の理論におけるツイスト偶のユニバーサルな a-ゲージ解の低レベルでの振る舞いについて2023

    • Author(s)
      岸本功
    • Journal Title

      山陽小野田市立山口東京理科大学紀要

      Volume: 6 Pages: 73-77

    • Related Report
      2022 Research-status Report
    • Open Access
  • [Journal Article] The Veneziano amplitude via mostly BRST exact operator2022

    • Author(s)
      Kishimoto Isao、Sasaki Tomoko、Seki Shigenori、Takahashi Tomohiko
    • Journal Title

      Nuclear Physics B

      Volume: 974 Pages: 115647-115647

    • DOI

      10.1016/j.nuclphysb.2021.115647

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] 単位弦場に基づく解周りの開弦の場の理論における「二重ブレーン」解の分岐について2022

    • Author(s)
      岸本功
    • Journal Title

      山陽小野田市立山口東京理科大学紀要

      Volume: 5 Pages: 75-79

    • Related Report
      2021 Research-status Report
  • [Journal Article] Numerical universal solutions in <i>a</i>-gauge in open string field theory2021

    • Author(s)
      Kishimoto Isao
    • Journal Title

      Progress of Theoretical and Experimental Physics

      Volume: 2021 Issue: 12

    • DOI

      10.1093/ptep/ptab134

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Numerical twist-even SU(1,1)-singlet solutions in open string field theory around the identity-based solution2021

    • Author(s)
      Kishimoto Isao、Takahashi Tomohiko
    • Journal Title

      Journal of High Energy Physics

      Volume: 2021 Issue: 2 Pages: 1-26

    • DOI

      10.1007/jhep02(2021)133

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] 開弦の場の理論の古典解に関する2次の恒等式の数値的評価2021

    • Author(s)
      岸本功
    • Journal Title

      東京理科大学紀要(教養篇)

      Volume: 53 Pages: 353-374

    • NAID

      40022675711

    • Related Report
      2020 Research-status Report
  • [Presentation] 開弦の場の理論における数値解周りの質量スペクトラムについて2023

    • Author(s)
      岸本功
    • Organizer
      YITP Workshop 場の理論と弦理論 2023
    • Related Report
      2023 Annual Research Report
  • [Presentation] Mostly BRST Exact演算子によるVirasoro-Shapiro振幅の導出2023

    • Author(s)
      岸本功, 関穣慶, 高橋智彦
    • Organizer
      日本物理学会第78回年次大会(2023年)
    • Related Report
      2023 Annual Research Report
  • [Presentation] 開弦の場の理論における数値解周りのスペクトラムの解析2023

    • Author(s)
      岸本功
    • Organizer
      日本物理学会2023年春季大会
    • Related Report
      2022 Research-status Report
  • [Presentation] On numerical universal solutions in a-gauge in open string field theory2021

    • Author(s)
      Isao Kishimoto
    • Organizer
      YITP Workshop Strings and Fields 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] 開弦の場の理論におけるaゲージのユニバーサルな数値解について2021

    • Author(s)
      岸本功
    • Organizer
      日本物理学会第76回年次大会
    • Related Report
      2020 Research-status Report
  • [Presentation] On numerical solutions in open string field theory around the identity-based solution2020

    • Author(s)
      Isao Kishimoto
    • Organizer
      YITP Workshop Strings and Fields 2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research

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Published: 2020-04-28   Modified: 2025-01-30  

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