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Search for Duble Lambda Hypernuclei

Research Project

Project/Area Number 13440082
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 素粒子・核・宇宙線
Research InstitutionOsaka Electro-Communication University

Principal Investigator

FUKUDA Tomokazu  Osaka Electro-Communication University, Faculty of Engineering, Professor, 工学部, 教授 (50116092)

Co-Investigator(Kenkyū-buntansha) SEKIMOTO Michiko  High Energy Accelerator Research Organization, Institute of Particle and Nuclear Studies, Research Associate, 素粒子原子架空研究所, 助手 (50206637)
OUTA Haruhiko  RIKEN, Advanced Meson Science Laboratory, Researcher, ミュオン科学研究室, 先任研究員 (60221818)
NAGAE Tomofumi  High Energy Accelerator Research Organization, Institute of Particle and Nuclear Studies, Professor, 素粒子原子核研究所, 教授 (50198298)
Project Period (FY) 2001 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥7,700,000 (Direct Cost: ¥7,700,000)
Fiscal Year 2003: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2002: ¥2,600,000 (Direct Cost: ¥2,600,000)
Fiscal Year 2001: ¥4,400,000 (Direct Cost: ¥4,400,000)
KeywordsDouble-Λ hypernuclei / Strageness nuclear physics / (K^-,K^+) reaction / Λ-Λ interaction / Pimesonic weak decay / Cylindrical detector system / Neutron-rich hypernuclei / (π^-,K^+) reaction / 円筒型検出器系 / (K-,K+)反応 / (π-,K+)反応 / BNL-AGS加速器 / 中間エネルギー核物理 / (K^-,K^+)反応
Research Abstract

1.We have prepared the experiment to identify double-Λ hypernuclei, in particular ^4<_<ΛΛ>H>, at AGS accelerator of Brookhaven National Laboratory in US. However all the experiments by using protons on fixed target have been postponed due to budgetary problem. During the preparation period we have developed a new type of cathode readout chamber. In addition several theoretical groups have been trying to calculate the ^4<_<ΛΛ>H> mass, which is very important to extract lambda-lambda interaction, and await the experimental result.
2.We have carried out the experiment to produce a neutron-rich hypercleus for the first time at PS accelerator of KEK by using (π^-,K^+) reaction on ^<10>B target. This study is quite important in order to understand the Λ-Σ coupling in hypernuclei as well as hyperon mixing in dense nuclear matter like neutron stars. We have successfully observed bound states of ^<10><_ΛLi>, which will lead to the production of more exotic hypernuclei such as ^6<_ΛH>. We also took data on the quasi-free production of Λ, Σ^-as well as Λ via double charge-exchange reaction, which will help to extract the Σ^--nucleus interction.

Report

(4 results)
  • 2003 Annual Research Report   Final Research Report Summary
  • 2002 Annual Research Report
  • 2001 Annual Research Report
  • Research Products

    (25 results)

All Other

All Publications (25 results)

  • [Publications] Tomokazu Fukuda: "Study of Doubly Strangeness Nuclei at BNL"Nuclear Physics. A721. 955c-958c (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Takahashi, et al.: "Observation of Double-Hypernuclei and ΛΛ Interaction"Nuclear Physics. A721. 951c-954c (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] P.K.Saha, et al.: "Production of Neutron-Rich Λ Hypernuclei by the (π^-,K^+) Double Charge-Exchange Reaction"Nuclear Physics.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Noumi, et al.: "Sigma-Nucleus Potential in A=28"Phys.Rev.Lett.. 89. 072301-1-072301-4 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Takahashi, et al.: "Observation of ^6_<ΛΛ>He Double Hypernucleus"Phys.Rev.Lett.. 87. 212509-1-212509-5 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] T.Fukuda, et al.: "First Results from E906 Experiment at BNL"Nucl.Phys.. A691. 220c-225c (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Tomokazu Fukuda: "Study of Doubly Strangeness Nuclei at BNL"Nuclear Physics, A. 721. 955c-958c (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Takahashi et al.: "Observation of Double-Hypernuclei and ΛΛ Interaction"Nuclear Physics, A. 721. 951c-954c (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] K.Saha et al.: "Production of Neutron-Rich Λ Hypernuclei by the (π^-,K^+)Doub1e Charge-Exchange Reaction"(In press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Noumi et al.: "Sigma-Nucleus Potential in A = 28"Phys.Rev.Lett.. 89. 072301-1-072301-4 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Takahashi et al.: "Observation of ^6<_<ΛΛ>He> Double Hypemucleus"Phys.Rev.Lett.. 87. 212509-1-212509-5 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] T.Fukuda et al.: "First Results from E906 Experiment at BNL"Nuclear Physics, A. 691. 220c-225c (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Tomokazu Fukuda: "Study of Doubly Strangeness Nuclei at BNL"Nuclear Physics. A721. 955c-958c (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] A.Sakaguchi et al.: "Structure of ^<13>_ΛC Hypernucleus Studied by the (K^-, π^- γ) Reaction"Nuclear Physics. A721. 979c-982c (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] H.Takahashi et al.: "Observation of Double-hypernuclei and ΛΛ Interaction"Nuclear Physics. A721. 951c-954c (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] J.H.Kim et al.: "Neutron Energy Spectra from the Nonmesonic Weak Decay of _Λ^<12>C and _Λ^<89>Y Hypernuclei"Physical Review. C68. 065201-1-065201-5 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] T.Kadowaki et al.: "Asymmetry Measurement of the Polarized Σ+p Elastic Scattering and the Hyperon-Nucleon Spin-Orbit Interaction"European Physical Journal. A15. 295-298 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] H.Noumi et al.: "Sigma-Nucleus Potential in A=28"Phys. Rev. Lett.. 89. 072301-1-072301-4 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] H.Kohri et al.: "^<13>C_Λ Hypernucleus studied with ^<13>C(K^-,π^-γ) Reaction"Phys. Rev.. C65. 034607-1-034607-9 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] T.Tamagawa et al.: "The ΞN Interaction in Quasi-Free Ξ^-Production"Nucl. Phys.. A691. 234c-237c (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Tomokazu Fukuda et al.: "Ξ^-N Interaction in E906 at BNL"Nucl. Phys.. A684. 589c-591c (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] J.K.Ahn et al.: "Production of ^4_<ΛΛ>H Hypernuclei"Phys. Rev. Lett.. 87. 132504・1-132504・5 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] H.Takahashi et al.: "Observation of ^6_<ΛΛ>He Double Hypernucleus"Phys. Rev. Lett.. 87. 212509・1-212509・5 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] T.Fukuda et al.: "First Results from E906 Experiment at BNL"Nucl. Phys.. A691. 220c-225c (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Yasuo Yamamoto et al.: "Ξ^-Emission Probability at (K^-,K^+) Reaction Points and the Ξn Interaction"Prog. Theo. Phys.. 106. 363-372 (2001)

    • Related Report
      2001 Annual Research Report

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Published: 2001-04-01   Modified: 2016-04-21  

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