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反D中間子と核子のエキゾチックな束縛状態と散乱状態の解析

Research Project

Project/Area Number 12J03518
Research Category

Grant-in-Aid for JSPS Fellows

Allocation TypeSingle-year Grants
Section国内
Research Field 素粒子・原子核・宇宙線・宇宙物理(理論)
Research InstitutionOsaka University

Principal Investigator

山口 康宏  大阪大学, 理学研究科, 特別研究員(DC2)

Project Period (FY) 2012 – 2013
Project Status Completed (Fiscal Year 2013)
Budget Amount *help
¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 2013: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2012: ¥900,000 (Direct Cost: ¥900,000)
Keywordsヘビークォーク対称性 / ヘビーメソン / パイオン交換力 / 少数多体系 / ハドロン分子状態 / ペンタクォーク状態
Research Abstract

本研究はヘビーメソンと2核子により形成される3粒子糸の束縛状態または共鳴の探索を目的としている。ヘビークォークは非常に質量が大きいため、クォーク質量に反比例するスピン-スピン相互作用が抑制される。そのためヘビー擬スカラーメソンとヘビーベクターメソンの質量の縮退がおこり、粒子間に働くパイオン交換力が強調させる。パイオン交換力は強い引力を生み出し、特に軌道角運動量が異なるチャンネルを混ぜるテンソル項が束縛・共鳴状態の形成に重要な働きをする。本研究では、パイオン交換力が生成する強い引力に着目し、ヘビーメソン-2核子系に対するSchrodinger方程式を解くことによって、束縛状態と散乱状態の解析を行った。ヘビーメソンとして、反D中間子とB中間子(以下P)について解析を行い、クォーク-反クォーク対消滅の起こらない真にエキゾチックな状態を探索する。このような状態は軽いクォークの領域では発見されておらず、重いクォークの領域で期待される新たな状態である。これらの系の解析は、ハドロン間のパイオン交換力が、近年ヘビーフレーバー領域で議論されているハドロン分子状態の形成において重要な働きをしていることを示し、またそれにより期待される新たな状態を予言する。当該年度で研究を行った結果、PNN系のJ~P=0^-に束縛状態、J~P=1^-に共鳴があることを予言した。これらの状態形成にはヘビーメソン-核子間のパイオン交換力のテンソル力が強い引力を生成する原動力となっていることが確かめられた。

Strategy for Future Research Activity

(抄録なし)

Report

(2 results)
  • 2013 Annual Research Report
  • 2012 Annual Research Report
  • Research Products

    (28 results)

All 2014 2013 2012

All Journal Article (5 results) (of which Peer Reviewed: 5 results) Presentation (23 results) (of which Invited: 1 results)

  • [Journal Article] Hadronic molecules for charmed and bottom baryons near thresholds2013

    • Author(s)
      Y. Yamaguchi
    • Journal Title

      Physical Review D

      Volume: 87 Issue: 7

    • DOI

      10.1103/physrevd.87.074019

    • Related Report
      2013 Annual Research Report 2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Spin degeneracy in multi-hadron systems with a heavy quark2013

    • Author(s)
      S. Yasui
    • Journal Title

      Physics Letters B

      Volume: 727 Issue: 1-3 Pages: 185-189

    • DOI

      10.1016/j.physletb.2013.10.019

    • Related Report
      2013 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Exotic mesons with hidden bottom near thresholds2012

    • Author(s)
      S. Ohkoda
    • Journal Title

      Physical Review D

      Volume: 86 Issue: 1 Pages: 140041-1400414

    • DOI

      10.1103/physrevd.86.014004

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Exotic mesons with double charm and bottom flavor2012

    • Author(s)
      S. Ohkoda
    • Journal Title

      Physical Review D

      Volume: 86 Issue: 3 Pages: 340191-3401912

    • DOI

      10.1103/physrevd.86.034019

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Decays and productions via bottomonium for Z_b resonances and other Banti-B molecules2012

    • Author(s)
      S. Ohkoda
    • Journal Title

      Physical Review D

      Volume: 86 Issue: 11 Pages: 1175021-1175024

    • DOI

      10.1103/physrevd.86.117502

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Presentation] 重いクォーク極限におけるハドロン分子状態のスピン縮退2014

    • Author(s)
      山口康宏
    • Organizer
      日本物理学会第69回年次大会
    • Place of Presentation
      東海大学
    • Year and Date
      2014-03-27
    • Related Report
      2013 Annual Research Report
  • [Presentation] Exotic dibaryons with a heavy antiquark2014

    • Author(s)
      Y. Yamaguchi
    • Organizer
      Workshop on J-PARC hadron physics in 2014
    • Place of Presentation
      Ibaraki Quantum Beam Research Center, Ibaraki
    • Year and Date
      2014-02-10
    • Related Report
      2013 Annual Research Report
  • [Presentation] Exotic dibaryons with a heavy antiquark2013

    • Author(s)
      Y. Yamaguchi
    • Organizer
      XV International Conference on Hadron Spectroscopy (Hadron 2013)
    • Place of Presentation
      奈良県新公会堂
    • Year and Date
      2013-11-07
    • Related Report
      2013 Annual Research Report
  • [Presentation] Exotic dibaryons with a heavy antiquark2013

    • Author(s)
      Y. Yamaguchi
    • Organizer
      YITP international workshop on Hadron in Nucleus
    • Place of Presentation
      Kyoto University
    • Year and Date
      2013-11-01
    • Related Report
      2013 Annual Research Report
  • [Presentation] Exotic dibaryons with a heavy antiquark2013

    • Author(s)
      Y. Yamaguchi
    • Organizer
      The Seventh International Symposium on Chiral Symmetry in Hadrons and Nuclei (Chiral 2013)
    • Place of Presentation
      Beihang University, China
    • Year and Date
      2013-10-28
    • Related Report
      2013 Annual Research Report
    • Invited
  • [Presentation] 重いクォークを含むエキゾチックダイバリオンの解析2013

    • Author(s)
      山口康宏
    • Organizer
      日本物理学会2013年秋季大会
    • Place of Presentation
      高知大学
    • Year and Date
      2013-09-22
    • Related Report
      2013 Annual Research Report
  • [Presentation] Exotic dibaryons with a heavy antiquark2013

    • Author(s)
      山口康宏
    • Organizer
      ミニ滞在型研究検討会「チャームバリオンの構造と生成」
    • Place of Presentation
      KEK東海キャンパス
    • Year and Date
      2013-09-13
    • Related Report
      2013 Annual Research Report
  • [Presentation] 重いクォークを含むエキゾチックダイバリオンの解析2013

    • Author(s)
      山口康宏
    • Organizer
      RCNP/九大研究会「ハドロン物理と原子核物理のクロスオーバー」
    • Place of Presentation
      九州大学
    • Year and Date
      2013-09-05
    • Related Report
      2013 Annual Research Report
  • [Presentation] Anti-D and B nuclei with one pion exchange potential2013

    • Author(s)
      Y. Yamaguchi
    • Organizer
      Hadron Nuclear Physics 2013 (HNP13)
    • Place of Presentation
      Zhangjiajie, China
    • Year and Date
      2013-07-20
    • Related Report
      2013 Annual Research Report
  • [Presentation] Exotic dibaryons with an anti-heavy quark2013

    • Author(s)
      Y. Yamaguchi
    • Organizer
      The 12th Asia Pacific Physics Conference (APPC12)
    • Place of Presentation
      International Conference Hall, Makuhari Messe, Chiba
    • Year and Date
      2013-07-18
    • Related Report
      2013 Annual Research Report
  • [Presentation] 重いクォークを含むエキゾチックダイバリオンの解析2013

    • Author(s)
      Y. Yamaguchi
    • Organizer
      RCNP Workshop on the Importance of Tensor interactions in Nuclear and Hadron structure
    • Place of Presentation
      RCNP, Osaka University
    • Year and Date
      2013-07-11
    • Related Report
      2013 Annual Research Report
  • [Presentation] Anti-D and B nuclei with one pion exchange potential2013

    • Author(s)
      Y. Yamaguchi
    • Organizer
      Baryons2013 International Conference on the Structure of Baryons
    • Place of Presentation
      University of Glasgow, UK
    • Year and Date
      2013-06-24
    • Related Report
      2013 Annual Research Report
  • [Presentation] 反D中間子あるいはB中間子を含む原子核少数多体系の解析2013

    • Author(s)
      山口 康宏
    • Organizer
      日本物理学会第68回年次大会
    • Place of Presentation
      広島大学
    • Year and Date
      2013-03-28
    • Related Report
      2012 Annual Research Report
  • [Presentation] Exotic baryons from a heavy meson and a nucleon2013

    • Author(s)
      Y. Yamaguchi
    • Organizer
      Workshop on 'Elucidation of New Hadrons with a Variety of Flavors' - Giant-in-Aid for Scientific Research on Innovative Areas
    • Place of Presentation
      KEN
    • Year and Date
      2013-03-22
    • Related Report
      2012 Annual Research Report
  • [Presentation] Exotic baryons froi a heavy meson and a nucleon2013

    • Author(s)
      Y. Yamaguchi
    • Organizer
      Recent progress in hadron physics -From hadrons to quark and gluon- 2013
    • Place of Presentation
      Yonsei University(韓国)(招待講演)
    • Year and Date
      2013-02-19
    • Related Report
      2012 Annual Research Report
  • [Presentation] Exotic baryons from a heavy meson and a nucleon2013

    • Author(s)
      Y. Yamaguchi
    • Organizer
      Workshop on ' Future Prospects of Hadron Physics at J-PARC and Large Scale Computational Physics in 2013'
    • Place of Presentation
      いぱらき量子ビーム研究センター
    • Year and Date
      2013-02-13
    • Related Report
      2012 Annual Research Report
  • [Presentation] Exotic baryons from a heavy meson and a nucleon2012

    • Author(s)
      Y. Yamaguchi
    • Organizer
      Resonances and non-Hermitian systems in Quantum mechanics
    • Place of Presentation
      京都大学基礎物理研究所
    • Year and Date
      2012-12-12
    • Related Report
      2012 Annual Research Report
  • [Presentation] 重い中間子と核子によるエキゾチックハドロンの解析2012

    • Author(s)
      山口 康宏
    • Organizer
      J-PARCで展開されるヘビークォーク物理
    • Place of Presentation
      KEK東海キャンパス
    • Year and Date
      2012-12-02
    • Related Report
      2012 Annual Research Report
  • [Presentation] Exotic baryons from a heavy meson and a nucleon2012

    • Author(s)
      Y. Yaiaguchi
    • Organizer
      Hadron Structure and Interactions in 2012
    • Place of Presentation
      大阪大学核物理研究センター
    • Year and Date
      2012-11-17
    • Related Report
      2012 Annual Research Report
  • [Presentation] 重い中間子と2核子の束縛状態の解析2012

    • Author(s)
      山口 康宏
    • Organizer
      日本物理学会2012年秋季大会
    • Place of Presentation
      京都産業大学
    • Year and Date
      2012-09-11
    • Related Report
      2012 Annual Research Report
  • [Presentation] Exotic baryons from a heavy me sod and a nucleon2012

    • Author(s)
      Y. Yamaguchi
    • Organizer
      The 20th Internaliona IUPAP Conference on Few-Body Problems in Physics
    • Place of Presentation
      福岡国際会議場
    • Year and Date
      2012-08-20
    • Related Report
      2012 Annual Research Report
  • [Presentation] Exotic baryons from a heavy meson and a nucleon2012

    • Author(s)
      Y. Yamaguchi
    • Organizer
      Heavy Quark Hadrons at J-PARC 2012
    • Place of Presentation
      東京工業大学
    • Year and Date
      2012-06-20
    • Related Report
      2012 Annual Research Report
  • [Presentation] Exotic baryons from a heavy meson and a nucleon2012

    • Author(s)
      Y. Yamaguchi
    • Organizer
      The 5th International Workshop on Charm Physics(CHARM2012)
    • Place of Presentation
      University of Hawaii at Manoa (USA)
    • Year and Date
      2012-05-16
    • Related Report
      2012 Annual Research Report

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Published: 2013-04-25   Modified: 2024-03-26  

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