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New picture of meson-nuclear states probed by few-body systems

Research Project

Project/Area Number 18K13545
Research Category

Grant-in-Aid for Early-Career Scientists

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

Principal Investigator

Junko Yamagata-Sekihara  京都産業大学, 理学部, 教授 (90548215)

Project Period (FY) 2018-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2019: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2018: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Keywordsエキゾチック原子核 / 中間子ー原子核束縛系 / 反K中間子 / 強い相互作用 / 量子色力学 / K中間子原子 / ハドロン多体系 / 中間子原子 / K中間子 / ストレンジネス / ハドロン / 中間子原子核 / ハドロン分子状態 / ハドロン物理 / 理論核物理 / カイラル対称性 / 少数多体系
Outline of Final Research Achievements

In this study, we performed a theoretical calculation of the meson-nucleus state, which is the bound state of a meson and a nucleus. Specifically, we extracted information about the interaction between the K meson and the nucleus from highly accurate data on K mesic atoms obtained in the J-PARC E62 experiment for 4He-K and 3He-K. We determined the potential parameters that simultaneously reproduce the experimental data of many K mesic atoms obtained so far. We investigated how the relationship between the real and imaginary parts of the potential affects the K mesic atom state, emphasizing that the magnitude of the imaginary part is significant compared to the real part.

Academic Significance and Societal Importance of the Research Achievements

本研究では、精密測定された実験データより反K中間子と原子核の間の相互作用の情報を引き出すことができた。これまで我々が解明できた強い相互作用は、アップクォークとダウンクォークで構成される核子の間に働く核力のみである。そのため、ストレンジネスクォークを構成クォークに持つ反K中間子の性質を知ることは、強い相互作用の新たな知見を得ることになる。また、反K中間子は中性子星の構造とも密接に関連していると言われている。非常に高密度な天体である中性子星の存在可能性についての手がかりを提供できると期待される。

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

    (6 results)

All 2023 2022 2019 2018

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (5 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results)

  • [Journal Article] KbarDbarN molecular state as a “uudscbar pentaquark” in a three-body calculation2019

    • Author(s)
      Yamagata-Sekihara Junko、Sekihara Takayasu
    • Journal Title

      Physical Review C

      Volume: 100 Issue: 1 Pages: 1-12

    • DOI

      10.1103/physrevc.100.015203

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] K中間子ヘリウム原子とK中間子-原子核相互作用の理論的考察2023

    • Author(s)
      山縣淳子
    • Organizer
      日本物理学会2023年春季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Theoretical aspect of kaonic atoms - Optical potential from J-PARC E62 -2022

    • Author(s)
      J. Yamagata-Sekihara
    • Organizer
      International workshop on "Hadron physics with kaon beam and related topics
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] K中間子ヘリウム原子の高精度測定から考察するK中間子-原子核相互作用2022

    • Author(s)
      山縣淳子、比連崎悟
    • Organizer
      日本物理学会第77回年次大会
    • Related Report
      2021 Research-status Report
  • [Presentation] K- ビームと重水素・3He標的による Λ(1405)生成反応の理論計算2019

    • Author(s)
      山縣淳子
    • Organizer
      日本物理学会2019年秋季大会
    • Related Report
      2019 Research-status Report
  • [Presentation] KbarDbarN molecular state as a "uudscbar pentaquark" in a three-body calculation2018

    • Author(s)
      J. Yamagata-Sekihara
    • Organizer
      第5回日米物理学会合同核物理分科会
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research

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

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