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Production and decay spectra of the neutron-rich hypernuclei and effects of channels coupling

Research Project

Project/Area Number 16K05363
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Particle/Nuclear/Cosmic ray/Astro physics
Research InstitutionOsaka Electro-Communication University

Principal Investigator

HARADA Toru  大阪電気通信大学, 共通教育機構, 教授 (70238187)

Co-Investigator(Kenkyū-buntansha) 平林 義治  北海道大学, 情報基盤センター, 准教授 (60271714)
Research Collaborator UMEYA Atsushi  
KOIKE Takahisa  
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywordsハイパー核 / ストレンジネス / チャネル結合 / 中性子過剰核 / 核反応 / 連続状態 / 少数多体系 / 核構造 / スペクトル / 理論核物理 / ポテンシャル / コヒーレント
Outline of Final Research Achievements

We study theoretically production and decay spectra of hypernuclei obtained at J-PARC facilities within a distorted-wave impulse approximation in order to see the effects and role of channel coupling between hypernucler states. The results are as follows: (1) A calculated spectra for a neutron-rich 6H_Lambda hypernucleus via the (pi-, K+) reaction on a 6Li target suggests that the Sigma-mixing probability amounts to about 0.3% via Sigma doorways in comparison with the experimental data. (2) A theoretical analysis shows that the Sigma-5He potential has a repulsive +30 MeV-strength in the real part. (3) Theoretical calculations of the 3He (pi, K) reaction including three-body break-up channels predict that the production cross section of the 3H_Lambda 1/2+ ground state is about 3 μb /sr.

Academic Significance and Societal Importance of the Research Achievements

ハイパー核研究の進展によって,宇宙の物質を構成している陽子や中性子の仲間であるバリオンや湯川粒子のパイ中間子などが担う核力全体の性質が解明され,宇宙にある中性子星やブラックホールの内部構造の理解につながると期待される。本研究でハイペロンと陽子・中性子間にはたらく2体核力やLambda NNなどの3体核力の性質についての理解が進み,核物質中でのハイペロンさらにはストレンジネスの役割とその重要性が分かってきたが,さらなる定量的な研究の進展が望まれる。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (28 results)

All 2019 2018 2017 2016

All Journal Article (11 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 11 results,  Open Access: 6 results,  Acknowledgement Compliant: 3 results) Presentation (17 results) (of which Int'l Joint Research: 4 results,  Invited: 5 results)

  • [Journal Article] Production Spectra of 3He(pi, K) Reactions with Continuum Discretized Coupled Channels2019

    • Author(s)
      T. Harada, Y. Hirabayashi
    • Journal Title

      JPS ConferenceProceedings

      Volume: 印刷中

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Recent Developments on Σ Hypernuclear Study―Solving the Mystery of Σ Particle from Atoms, Nuclei, and Neutron Stars2018

    • Author(s)
      原田融
    • Journal Title

      Butsuri

      Volume: 73 Issue: 8 Pages: 542-550

    • DOI

      10.11316/butsuri.73.8_542

    • NAID

      130007610710

    • ISSN
      0029-0181, 2423-8872
    • Year and Date
      2018-08-05
    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Repulsion and absorption of the Sigma-nucleus potential for Sigma- -5He in the 6Li(pi- ,K+) reaction2018

    • Author(s)
      T. Harada, R. Honda, Y. Hirabayashi
    • Journal Title

      Physical Review C

      Volume: 97 Issue: 2

    • DOI

      10.1103/physrevc.97.024601

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Production of a neutron-rich 6H_Lambda hypernucleus in the 6Li(pi-, K+) reaction2017

    • Author(s)
      T. Harada, Y. Hirabayashi
    • Journal Title

      Physical Review C

      Volume: 95 Issue: 4

    • DOI

      10.1103/physrevc.95.044610

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Existence of inelastic supernumerary nuclear rainbow in 16O+12C scattering2017

    • Author(s)
      S. Ohkubo, Y. Hirabayashi, A. A. Ogloblin
    • Journal Title

      Physical Review C

      Volume: 96 Issue: 2

    • DOI

      10.1103/physrevc.96.024607

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Pole of the S matrix of the 4He_Sigma hypernucleus on Riemann sheets2017

    • Author(s)
      T. Harada, Y. Hirabayashi
    • Journal Title

      JPS Conference Proceedings

      Volume: 17

    • DOI

      10.7566/jpscp.17.012008

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Production spectra of neutron-rich hypernuclear states in the 6Li(pi-,K+) reaction at 1.2 GeV/c2017

    • Author(s)
      T. Harada, Y. Hirabayashi
    • Journal Title

      JPS Conference Proceedings

      Volume: 17

    • DOI

      10.7566/jpscp.17.013002

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] K-pp-Kbar0np coupled-channel DWIA calculation for (K-, n) reaction spectrum2017

    • Author(s)
      T. Koike, T. Harada, A. Dote
    • Journal Title

      JPS Conference Proceedings

      Volume: 17 Pages: 082004-082004

    • DOI

      10.7566/jpscp.17.082004

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] "Neutron Star Matter EOS in RMF with Multi-Body Couplings2017

    • Author(s)
      Akira Ohnishi, Kohsuke Tsubakihara, Toru Harada
    • Journal Title

      JPS Conference Proceedings

      Volume: 14

    • DOI

      10.7566/jpscp.14.020811

    • NAID

      120006654214

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Evidence for a dynamically refracted primary bow in weakly bound 9Be rainbow scattering from 16O2016

    • Author(s)
      S. Ohkubo, Y. Hirabayashi
    • Journal Title

      Physical Review C

      Volume: 94 Issue: 3

    • DOI

      10.1103/physrevc.94.034601

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Low energy scattering cross sections for n+6,7Li reactions using the continuumdiscretized2016

    • Author(s)
      D. Ichinkhorloo, M. Aikawa, S. Chiba, Y. Hirabayashi, and K. Kato
    • Journal Title

      PHYSICAL REVIEW C

      Volume: 93 Issue: 6

    • DOI

      10.1103/physrevc.93.064612

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Presentation] Production spectra of 3He(pi, K) reactions with continuum discretized coupled channels2018

    • Author(s)
      T. Harada, Y. Hirabayashi
    • Organizer
      8th International Conference on Quarks and Nuclear Physics (QNP2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Σハイパー核の理論計算とΣN相互作用2018

    • Author(s)
      原田融
    • Organizer
      第2回「物質階層を横断する会」ハドロン・原子核・原子・分子合同ミーティング-- $\Sigma p$散乱実験の現状およびΣN相互作用に関連した話題 --
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] シグマハイパー核からストレンジネス核物理へ2018

    • Author(s)
      原田融
    • Organizer
      永江知文先生還暦研究会「ストレンジネス核物理の進展と今後の展望」
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] (pi, K)反応によるハイパー核励起状態のスペクトル2018

    • Author(s)
      原田融,平林義治
    • Organizer
      日本物理学会第74回年次大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] ハイパー核生成とチャネル結合2018

    • Author(s)
      原田融
    • Organizer
      2017年度KEK理論センターJ-PARC分室活動総括研究会
    • Related Report
      2017 Research-status Report
  • [Presentation] (pi-, K+)反応によるハイパー核励起状態2018

    • Author(s)
      原田融,平林義治
    • Organizer
      日本物理学会第73回年次大会
    • Related Report
      2017 Research-status Report
  • [Presentation] 6Li(pi-, K+)反応による中性子過剰ハイパー核6H_Lambdaの生成2017

    • Author(s)
      原田融,平林義治
    • Organizer
      日本物理学会第72回年次大会
    • Place of Presentation
      大阪大学豊中キャンパス,大阪府豊中市
    • Year and Date
      2017-03-17
    • Related Report
      2016 Research-status Report
  • [Presentation] 多体結合を含む相対論的平均場模型における高密度状態方程式2017

    • Author(s)
      椿原康介, 大西明, 原田融
    • Organizer
      日本物理学会第72回年次大会
    • Place of Presentation
      大阪大学豊中キャンパス,大阪府豊中市
    • Year and Date
      2017-03-17
    • Related Report
      2016 Research-status Report
  • [Presentation] Production of Hypernuclei2017

    • Author(s)
      T. Harada
    • Organizer
      International Workshop on Strangeness Nuclear Physics 2017 (SNP17)
    • Place of Presentation
      大阪電気通信大学,大阪府寝屋川市
    • Year and Date
      2017-03-12
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Production of SigmaNN quasibound states2017

    • Author(s)
      T. Harada
    • Organizer
      KEK theory center workshop on Hadron and Nuclear Physics in 2017 (KEK-HN-2017)
    • Place of Presentation
      高エネルギー加速器研究機構,つくば市
    • Year and Date
      2017-01-07
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] 多体結合を含むRMFによる中性子星とハイパー核2017

    • Author(s)
      大西明, 椿原康介, 原田融
    • Organizer
      日本物理学会2017年秋季大会
    • Related Report
      2017 Research-status Report
  • [Presentation] 6Li(pi-, K+)反応とSigma核ポテンシャル2017

    • Author(s)
      原田融,平林義治
    • Organizer
      日本物理学会2017年秋季大会
    • Related Report
      2017 Research-status Report
  • [Presentation] Xi-原子とXi核ポテンシャル2017

    • Author(s)
      原田融
    • Organizer
      第6回「ストレンジネス核物理を考える会」--グザイ原子生成について考える--
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] ハイパー核の物理2017

    • Author(s)
      原田融
    • Organizer
      KEK理論センター研究会「ハドロン・原子核物理の理論研究最前線 2017」
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] (K-,K+)反応によるXi-ハイパー核, ダブルLambdaハイパー核の生成2017

    • Author(s)
      原田融
    • Organizer
      第7回「ストレンジネス核物理を考える会」--ダブルLambdaハイパー核研究の現在と近未来--
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] Inclusive K+ spectra for neutron-rich 6H_Lambda production by 6Li(pi-, K+) reactions2016

    • Author(s)
      T. Harada
    • Organizer
      nternational Symposium on Neutron Star Matter (NSMAT2016) -- Recent Progress in Observations, Experiments and Theories --
    • Place of Presentation
      東北大学青葉キャンパス,仙台市
    • Year and Date
      2016-11-21
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] 多体結合を含む相対論的平均場模型における高密度状態方程式2016

    • Author(s)
      椿原康介, 大西明, 原田融
    • Organizer
      日本物理学会2016年秋季大会
    • Place of Presentation
      宮崎大学木花キャンパス,宮崎市
    • Year and Date
      2016-09-21
    • Related Report
      2016 Research-status Report

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Published: 2016-04-21   Modified: 2020-03-30  

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