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2004 Fiscal Year Final Research Report Summary

Experimental Study of Hyperon-Hyperon Interaction by Doubly Strange Nuclei

Research Project

Project/Area Number 14340069
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 InstitutionGifu University

Principal Investigator

NAKAZAWA Kazuma  Gifu University, Faculty of Education Physics Department, Professor, 教育学部, 教授 (60198059)

Co-Investigator(Kenkyū-buntansha) KAWASAKI Mamoru  Gifu University, Faculty of Education Physics Department, Professor, 教育学部, 教授 (60135176)
Project Period (FY) 2002 – 2004
KeywordsDoubly Strange Nuclei / Double Hypernuclei / Emulsion / NAGARA event / Weak Decay / Automated speedy scanning system / Brookhaven National Lab. / J-PARC
Research Abstract

For these three years, all the scanning was finished, and the scanning speed arrived at it than former 4times. As a result, an event to show an sequential decay topology of candidate double hypernucleus reached 7 examples and we succeeded in raising statistics for the past dozens of years to several times. Although it was unfortunate that the events which would be interpreted uniquely couldn't be found besides NAGARA event, it was an big result that we could know the useful information for theoretical calculation even by such events which would present multiple interpretations.
On the other hand, we succeeded in discovery of the event which probably showed the emission and decay of a Σ^-hyperon from Ξ^-absorption point at a last stage of the scanning. The emission of Σ^-hyperon provides information for the mixing of ΞN⇔ΛΛ⇔ΣΣ and also gives us knowledge relating to H-dibaryon staying at the key position of the mixing. In addition, that is the first information about the weak interaction with double-strangeness, e. g. ΞN→ΣN, ΛΛ→ΣN. We are doing detailed analysis, now, and going to announce its result in the 2nd meeting by physics societies of Japan and USA held in September, this year.
Furthermore, the proposed experiment giving us high statistics to Brookhaven Natl. Lab. (BNL) was accepted in the program advisory committee by speedup of the scanning. It would be proved that the successful improvement of scanning technology by this research was admitted. It was a big result we could suggest new experiments which would be available in near future in many domestic and foreign meetings based on that acceptance. These results were known by 12 articles in academic journals and 14 oral presentations in workshop (including 12 Int'l conferences).

  • Research Products

    (22 results)

All 2005 2004 2003 2002 Other

All Journal Article (22 results)

  • [Journal Article] Doubly-strange and charm nuclear physics at J-PARC.2005

    • Author(s)
      仲澤 和馬
    • Journal Title

      原子核研究 49

      Pages: 117-121

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Doubly-strange and charm nuclear physics at J-PARC.2005

    • Author(s)
      K.Nakazawa.
    • Journal Title

      Genshikaku Kenkyu Vol.49 No.6

      Pages: 117-121

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] (解説)やっと正体をつかんだ「二重に奇妙な」原子核(ダブルハイパー核)-"NAGARA event"の発見-2004

    • Author(s)
      仲澤 和馬
    • Journal Title

      日本写真学会誌:特集/放射線の痕跡を追う 67巻6号

      Pages: 544-549

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Hypernuclear Fine Structure in ^<16>_ΛO and the ΛN Tensor Interaction.2004

    • Author(s)
      M.Ukai, K.Nakazawa, 他
    • Journal Title

      Physical Review Letters 93

      Pages: 232501-1-232501-5

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Study of Double- Λ Hypernuclei.2004

    • Author(s)
      K.Nakazawa
    • Journal Title

      Proceedings of the 1^<st> International Workshop on Nuclear Physics (ed. by M.Thein & K.S.Myint)(Mandalay University)

      Pages: 59-70

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Hybrid-Emulsion Experiment to Study S=-2 Systems at J-PARC.2004

    • Author(s)
      K.Imai, H.Tamura, K.Nakazawa, E964 collaborators.
    • Journal Title

      KEK Proceedings 2003-18

      Pages: 115-117

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] (Comment) Identification of "Doubly Strange" Nucleus with Much Effort -Discovery of "NAGARA event"-.2004

    • Author(s)
      K.Nakazawa.
    • Journal Title

      Journal of The Society of Photographic Science and Technology of Japan : Special Topics//Tracing the Track of Radiation Vol.67 No.6

      Pages: 544-549

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Hypernuclear Fine Structure in ^^<16>__ΛO and the ΛN Tensor Interaction.2004

    • Author(s)
      M.Ukai, K.Nakazawa, et al.
    • Journal Title

      Physical Review Letters (PRL.) Vol.93

      Pages: 232501-1-232501-5

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Study of Double-Λ Hypernuclei.2004

    • Author(s)
      K.Nakazawa.
    • Journal Title

      Proceedings of the 1^<st> International Workshop on Nuclear Physics (ed.by M.Thein & K.S.Myint) (Mandalay University)

      Pages: 59-70

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] E964 collaborators. Hybrid-Emulsion Experiment to Study S=-2 Systems at J-PARC.2004

    • Author(s)
      K.Imai, H.Tamura, K.Nakazawa
    • Journal Title

      KEK Proceedings 2003-18

      Pages: 115-117

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Observation of Double-Hypernuclei and Λ - Λ Interaction.2003

    • Author(s)
      H.Takahashi, K.Nakazawa, 他
    • Journal Title

      Nuclear Physics A721

      Pages: 951c-954c

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Study of Double Strangeness nuclei with Hybrid Emulsion Method.2003

    • Author(s)
      H.Takahashi for KEK-PS E373 collaboration
    • Journal Title

      KEK Proceedings 2002-29

      Pages: 1-6

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] The E964 experiment for Double Hypernuclei.2003

    • Author(s)
      K.Imai, H.Tamura, K.Nakazawa, E964 collaborators.
    • Journal Title

      KEK Proceedings 2002-29

      Pages: 7-10

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Systematic Study of Double Strangeness System by Emulsion -Counter Hybrid Method.2003

    • Author(s)
      K.Nakazawa, BNL-E964 collaborators.
    • Journal Title

      Proceedings of 2^<nd> Asia Pacific Conference on Few-Body Problems in Physics ; (ed.by H.Q.Song et al.) Modern Physics Lett. A18

      Pages: 2-6

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Observation of Double-Hypernuclei and Λ-Λ Interaction.2003

    • Author(s)
      H.Takahashi, K.Nakazawa, et al.
    • Journal Title

      Proceedings of the XVI^<th> international Conference on Particle and Nuclei (PANIC02) ; (ed.by Toki, et al.) Nuclear Physics (NP.) Vol.A721

      Pages: 951c-954c

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Study of Double Strangeness nuclei with Hybrid Emulsion Method.2003

    • Author(s)
      H.Takahashi for KEK-PS E373 collaboration.
    • Journal Title

      KEK Proceedings 2002-29

      Pages: 1-6

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] The E964 experiment for Double Hypernuclei2003

    • Author(s)
      K.Imai, H.Tamura, K.Nakazawa, E964 collaborators.
    • Journal Title

      KEK Proceedings 2002-29

      Pages: 7-10

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Systematic Study of Double Strangeness System by Emulsion-Counter Hybrid Method.2003

    • Author(s)
      K.Nakazawa, BNL-E964 collaborators.
    • Journal Title

      Proceedings of 2^<nd> Asia Pacific Conference on Few-Body Problems in Physics ; (ed.by H.Q.Song et al.) Modern Physics Lett. Vol.A18, No.2-6

      Pages: 116-119

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Scintillating-fiber-block detector for studying double-strangeness nuclei.2002

    • Author(s)
      H.Takahashi, K.Nakazawa, 他
    • Journal Title

      Nuclear Instrument and Methods A483

      Pages: 689-697

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Scintillating-fiber-block detector for studying double-strangeness nuclei.2002

    • Author(s)
      H.Takahashi, K.Nakazawa, et al.
    • Journal Title

      Nuclear Instrument and Methods (NIM.) Vol.A483

      Pages: 689-697

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] EXPERIMENT TO STUDY DOUBLE-A HYPERNUCLEI IN NEAR FUTURE.

    • Author(s)
      K.Nakazawa
    • Journal Title

      World Scientific (Modern Physics Lett.) (in print)

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] EXPERIMENT TO STUDY DOUBLE-Λ HYPERNUCLEI IN NEAR FUTURE

    • Author(s)
      K.Nakazawa.
    • Journal Title

      Proceedings of the International Workshop on Strangeness Nuclear Physics (SNP2004) : Modern Physics Lett. (in print)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2006-07-11  

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