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ハドロン間相互作用とハドロン共鳴の分子的構造の研究

Publicly Offered Research

Project AreaQuest on new hadrons with variety of flavors
Project/Area Number 24105702
Research Category

Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

Allocation TypeSingle-year Grants
Review Section Science and Engineering
Research InstitutionKyoto University (2013)
Tokyo Institute of Technology (2012)

Principal Investigator

兵藤 哲雄  京都大学, 基礎物理学研究所, 助教 (60539823)

Project Period (FY) 2012-04-01 – 2014-03-31
Project Status Completed (Fiscal Year 2013)
Budget Amount *help
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2012: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywordsハドロン分光学 / 重いクォーク / 普遍的物理 / 少数多体系 / 国際情報交換 / スペイン / 中国
Research Abstract

今年度は、ハドロンの分子的構造について、特に重いクォークのセクターおよびパイ中間子のみのセクターに注目して以下の研究を行った。
マルチハドロンのヘビークォーク対称性:ヘビークォークを1つ含むハドロンは、ヘビークォーク極限でスピン縮退を示すことが対称性の議論から知られている。本課題では、ハドロン分子状態や媒質中のハドロンなど複雑な内部構造をもつヘビーハドロン系もスピン縮退を示し、従来brown muckと呼ばれる軽いクォーク成分が豊かな構造を持ちうることを指摘した。この結果はヘビーハドロン分光の体系的理解に有用な視点を与えるのみならず、同じ多重項の粒子の生成や崩壊の性質の解明に役立つ。
パイ中間子3体系における普遍的物理:2体の散乱長が相互作用の到達距離より十分大きな系では、エフィモフ効果に代表される少数系の普遍的物理が現れることが知られており、冷却原子系での実験技術の進展などに刺激され近年精力的に研究されている。本課題では、軽いクォーク質量が仮想的に大きい領域でアイソスカラーチャンネルのパイオン散乱長が発散する点があることを利用し、パイ中間子3体系において普遍的物理が実現することを示した。アイソスピン対称性が厳密な場合は、束縛エネルギーが2パイオン束縛状態のものに比例するような単一の3体束縛状態が存在し、アイソスピン対称性の破れがある場合は、エフィモフ効果が起こり散乱長が発散する極限で無限個の3体束縛状態が存在する。これらの現象はクォーク質量を適切に調節した格子QCDで実現可能であり、また普遍的3体束縛状態の存在は核媒質中での対称性の回復に伴う多重パイ中間子チャンネルのソフト化に影響を与えることが期待される。

Current Status of Research Progress
Reason

25年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

25年度が最終年度であるため、記入しない。

Report

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

    (31 results)

All 2014 2013 2012 Other

All Journal Article (9 results) (of which Peer Reviewed: 9 results) Presentation (21 results) (of which Invited: 8 results) Remarks (1 results)

  • [Journal Article] Universal physics of three bosons with isospin2014

    • Author(s)
      Tetsuo Hyodo, Tetsuo Hatsuda, Yusuke Nishida
    • Journal Title

      Physical Review C

      Volume: 89 Issue: 3 Pages: 32201-32201

    • DOI

      10.1103/physrevc.89.032201

    • Related Report
      2013 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] Structure of Near-Threshold s-Wave Resonances 2013

    • Author(s)
      Tetsuo Hyodo
    • Journal Title

      Physical Review Letters

      Volume: 111 Issue: 13

    • DOI

      10.1103/physrevlett.111.132002

    • NAID

      110009754251

    • Related Report
      2013 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Structure and compositeness of hadron resonances2013

    • Author(s)
      Tetsuo Hyodo
    • Journal Title

      International Journal of Modern Physics A

      Volume: 28 Issue: 29 Pages: 1330045-1330045

    • DOI

      10.1142/s0217751x13300457

    • NAID

      120005353492

    • Related Report
      2013 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Size measurement of dynamically generated hadronic resonances with finite boxes2013

    • Author(s)
      Takayasu Sekihara, Tetsuo Hyodo
    • Journal Title

      Physical Review C

      Volume: 87 Issue: 4

    • DOI

      10.1103/physrevc.87.045202

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Production of doubly charmed tetraquarks with exotic color configurations in electron-positron collisions2013

    • Author(s)
      Yong-Liang Ma, Masayasu Harada, Hyun Kyu Lee, Yongseok Oh, Byung-Yoon Park and Mannque Rho
    • Journal Title

      Physics Letters B

      Volume: 721 Issue: 1-3 Pages: 56-60

    • DOI

      10.1016/j.physletb.2013.02.045

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] K中間子水素原子X線精密分光実験の拓く物理2013

    • Author(s)
      岡田信二、早野龍五、兵藤哲雄、池田陽一
    • Journal Title

      日本物理学会誌

      Volume: 68 Pages: 29-33

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Energy and width of a narrow I=1/2 DNN quasibound state2012

    • Author(s)
      M. Bayar
    • Journal Title

      Phys. Rev.

      Volume: C86 Issue: 4 Pages: 0440041-16

    • DOI

      10.1103/physrevc.86.044004

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] カイラル動力学とK中間子を含むハドロン分子的状態2012

    • Author(s)
      兵藤哲雄、慈道大介
    • Journal Title

      日本物理学会誌

      Volume: 67 Pages: 226-233

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Presentation] Structure and compositeness of hadrons2014

    • Author(s)
      Tetsuo Hyodo
    • Organizer
      ELPH 研究会 C008「GeV 領域光子で探るメソン生成反応の物理」
    • Place of Presentation
      東北大学, 宮城県
    • Related Report
      2013 Annual Research Report
  • [Presentation] Structure and compositeness of hadrons2014

    • Author(s)
      Tetsuo Hyodo
    • Organizer
      研究会 「ヘビークォークハドロンと原子核のスペクトルと構造」
    • Place of Presentation
      KEK, つくば, 茨城県
    • Related Report
      2013 Annual Research Report
  • [Presentation] Universal physics of three-bosons with isospin2014

    • Author(s)
      Tetsuo Hyodo, Tetsuo Hatsuda, Yusuke Nishida
    • Organizer
      日本物理学会 第69回年次大会
    • Place of Presentation
      東海大学, 神奈川県
    • Related Report
      2013 Annual Research Report
  • [Presentation] チャームバリオン励起状態とDN相互作用の応用2013

    • Author(s)
      Tetsuo Hyodo
    • Organizer
      日本物理学会 第68回年次大会
    • Place of Presentation
      広島大学(広島県)
    • Year and Date
      2013-03-26
    • Related Report
      2012 Annual Research Report
  • [Presentation] Production of doubly charmed tetraquarks with exotic color configurations in electron-positron collisions2013

    • Author(s)
      Tetsuo Hyodo
    • Organizer
      「多彩なフレーバーで探る新しいハドロン存在形態の包括的研究」新学術領域「新ハドロン」領域研究会
    • Place of Presentation
      KEK(茨城県)
    • Year and Date
      2013-03-21
    • Related Report
      2012 Annual Research Report
  • [Presentation] Production of doubly charmed tetraquarks with exotic color configurations in electron-positron collisions2013

    • Author(s)
      Tetsuo Hyodo
    • Organizer
      Recent progress in hadron physics -From hadrons to quark and gluon- 2013
    • Place of Presentation
      Yonsei Univ, Seoul, 韓国
    • Year and Date
      2013-02-18
    • Related Report
      2012 Annual Research Report
  • [Presentation] The Origin of Dynamically Generated Resonances2013

    • Author(s)
      Tetsuo Hyodo
    • Organizer
      International Conference on the Structure of Baryons (Baryons2013)
    • Place of Presentation
      University of Glasgow, イギリス
    • Related Report
      2013 Annual Research Report
    • Invited
  • [Presentation] Structure of near-threshold s-wave resonances2013

    • Author(s)
      Tetsuo Hyodo
    • Organizer
      日本物理学会 2013年秋季大会
    • Place of Presentation
      高知大学, 高知県
    • Related Report
      2013 Annual Research Report
  • [Presentation] Resonances in hadron physics2013

    • Author(s)
      Tetsuo Hyodo
    • Organizer
      Multi-particle resonances and astrophysical reaction problems in few-body systems
    • Place of Presentation
      理研, 和光市, 埼玉県
    • Related Report
      2013 Annual Research Report
    • Invited
  • [Presentation] Compositeness of hadron resonances in chiral dynamics2013

    • Author(s)
      Tetsuo Hyodo
    • Organizer
      The Seventh International Symposium on Chiral Symmetry in Hadrons and Nuclei (Chiral2013)
    • Place of Presentation
      Beihang University, Beijing, 中国
    • Related Report
      2013 Annual Research Report
    • Invited
  • [Presentation] Universal three-pion physics with a large scattering length2013

    • Author(s)
      Tetsuo Hyodo
    • Organizer
      XV International Conference on Hadron Spectroscopy (Hadron2013)
    • Place of Presentation
      奈良県新公会堂, 奈良県
    • Related Report
      2013 Annual Research Report
  • [Presentation] Compositeness of hadrons in field theoretical approach2012

    • Author(s)
      Tetsuo Hyodo
    • Organizer
      Resonances and non-Hermitian systems in quantum mechanics
    • Place of Presentation
      京都大学基礎物理学研究所(京都府)
    • Year and Date
      2012-12-11
    • Related Report
      2012 Annual Research Report
    • Invited
  • [Presentation] Kbar N相互作用とLambda(1405)2012

    • Author(s)
      Tetsuo Hyodo
    • Organizer
      ELPH 研究会 C005「ダブルメソン生成とバリオン分光」
    • Place of Presentation
      東北大学 電子光理学研究センター(宮城県)
    • Year and Date
      2012-11-29
    • Related Report
      2012 Annual Research Report
    • Invited
  • [Presentation] Energy and width of a narrow I=1/2 DNN quasibound state2012

    • Author(s)
      Tetsuo Hyodo
    • Organizer
      International Workshop on using Heavy Flavors to Probe New Hadron Spectroscopies/Dynamics
    • Place of Presentation
      Haeundae Grand Hotel, Busan, 韓国
    • Year and Date
      2012-11-18
    • Related Report
      2012 Annual Research Report
  • [Presentation] Meson-induced pentaquark productions2012

    • Author(s)
      Tetsuo Hyodo
    • Organizer
      Hadron Structure and Interactions in 2012
    • Place of Presentation
      大阪大学 核物理研究センター(大阪府)
    • Year and Date
      2012-11-16
    • Related Report
      2012 Annual Research Report
  • [Presentation] Recent developments in antikaon-nucleon dynamics2012

    • Author(s)
      Tetsuo Hyodo
    • Organizer
      The 11th International Conference on Hypernuclear and Strange Particle Physics
    • Place of Presentation
      Cosmocaixa, Barcelona, スペイン
    • Year and Date
      2012-10-01
    • Related Report
      2012 Annual Research Report
    • Invited
  • [Presentation] Meson-induced pentaquark productions2012

    • Author(s)
      Tetsuo Hyodo
    • Organizer
      日本物理学会 2012年秋季大会
    • Place of Presentation
      京都産業大学(京都府)
    • Year and Date
      2012-09-11
    • Related Report
      2012 Annual Research Report
  • [Presentation] Antikaon-nucleon dynamics and its application to few-body systems2012

    • Author(s)
      Tetsuo Hyodo
    • Organizer
      The 20th International IUPAP Conference on Few-Body Problems in Physics
    • Place of Presentation
      福岡国際会議場(福岡県)
    • Year and Date
      2012-08-20
    • Related Report
      2012 Annual Research Report
    • Invited
  • [Presentation] DN interaction, Lambda_c(2595), and DNN quasi-bound state2012

    • Author(s)
      Tetsuo Hyodo
    • Organizer
      Heavy Quark Hadrons at J-PARC 2012
    • Place of Presentation
      東京工業大学(東京都)
    • Year and Date
      2012-06-18
    • Related Report
      2012 Annual Research Report
  • [Presentation] Determination of the pi Sigma scattering lengths from the weak decays of Lambda_c2012

    • Author(s)
      Tetsuo Hyodo
    • Organizer
      Workshop on hadron physics with strangeness and beyond
    • Place of Presentation
      Stefan Meyer Institute, Wien, オーストリア
    • Related Report
      2012 Annual Research Report
  • [Presentation] Nature of the sigma meson as revealed by its softening process2012

    • Author(s)
      Tetsuo Hyodo
    • Organizer
      強相関量子多体系としてのハドロン・クォーク物質
    • Place of Presentation
      京都大学時計台国際交流ホール(京都府)
    • Related Report
      2012 Annual Research Report
    • Invited
  • [Remarks] 公募研究成果報告

    • URL

      http://www2.yukawa.kyoto-u.ac.jp/~tetsuo.hyodo/report24105702.html

    • Related Report
      2013 Annual Research Report

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Published: 2013-05-15   Modified: 2019-07-29  

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