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2011 Fiscal Year Final Research Report

Test of QCD by measuring a lifetime ofπK atoms-Extended DIRAC-

Research Project

  • PDF
Project/Area Number 20340059
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Particle/Nuclear/Cosmic ray/Astro physics
Research InstitutionKyoto Sangyo University

Principal Investigator

OKADA Kenji  京都産業大学, コンピュータ理工学部, 教授 (90093385)

Co-Investigator(Kenkyū-buntansha) TAKEUTCHI Fujio  京都産業大学, 名誉教授 (40121537)
CHIBA Masami  首都大学東京, 理工学研究科, 助教 (60128577)
IWASHITA Yoshihisa  京都大学, 化学研究所, 准教授 (00144387)
AOGAKI Souichirou  京都産業大学, コンピュータ理工学部, 講師 (00582363)
Co-Investigator(Renkei-kenkyūsha) KOBAYASHI Masaaki  高エネルギー加速器研究機構, 素粒子原子核研究所, 名誉教授 (40013388)
Project Period (FY) 2008 – 2011
Keywords2中間子原子 / QCD / S.波散乱長 / カイラル摂動計算 / ππ原子 / πK原子崩壊寿命 / シンチレーティングファイバーホドスコープ
Research Abstract

The study presents an evidence for the first observation of electromagnetically boundπ^±K^<-+-> pairs(πK-atoms) with the DIRAC experiment at the CERN-PS. The observed enhancement at low relative momentum corresponds to the production ofπK-atoms. The mean life ofπK-atoms is related to the s-waveπK-scattering lengths. We got a lower limit for the mean life of 0. 8 fs at 90% confidence level.

  • Research Products

    (18 results)

All 2011 2010 2009 2008 Other

All Journal Article (16 results) (of which Peer Reviewed: 10 results) Presentation (1 results) Remarks (1 results)

  • [Journal Article] Determination ofππscattering lengths from measurement ofπ^+π^-atom lifetime2011

    • Author(s)
      B. Adeva, M. Chiba(9番目), M. Kobayashi(36番目), K. Okada(59番目), F. Takeutchi(80番目), (他90名)
    • Journal Title

      Phys. Lett

      Volume: B704 Pages: 24-29

    • DOI

      DOI:10.1016/j.physletb.2011.08.074

    • Peer Reviewed
  • [Journal Article] DIRAC実験におけるπK原子の検出とその寿命測定2011

    • Author(s)
      青垣総一郎、岡田憲志、竹内富士雄、千葉雅美、岩下芳久、小林正明
    • Journal Title

      京都産業大学先端科学技術研究所所報

      Volume: 第10号 Pages: 75

  • [Journal Article] CERN PSにおけるDIRAC実験(PS212)用dE/dx検出器用プラスチックシンチレータの性能評価2011

    • Author(s)
      青垣総一郎
    • Journal Title

      京都産業大学先端科学技術研究所所報

      Volume: 第10号 Pages: 63-73

  • [Journal Article] Satellite pulsed tiny neutron source at Kyoto University2011

    • Author(s)
      Y. Iwashita, T. Nagae, T. Tanimori, H. Fujioka, H. M. Shimizu
    • Journal Title

      Nucl. Instr. Meth

      Volume: A634 Pages: S97-S99

    • DOI

      DOI:10.1016/j.nima.2010.06.356

    • Peer Reviewed
  • [Journal Article] Performance of a 511keV Gamma-ray Imager Using a LYSO(Ce) Crystal Array with Wave-Length Shifter2010

    • Author(s)
      S. Aogaki and F. Takeutchi
    • Journal Title

      IEEE Trans. Nucl. Sci

      Volume: 57 Pages: 1502-1511

    • DOI

      DOI:10.1109/TNS.2010.2043853

    • Peer Reviewed
  • [Journal Article] Read-out of LYSO : Ce matrix detector using wave-length-shifter fivers applicable to new PET scanner with high spatial resolution at low cost2010

    • Author(s)
      S. Aogaki and F. Takeutchi
    • Journal Title

      京都産業大学先端科学技術研究所所報

      Volume: 第9号 Pages: 35-58

  • [Journal Article] Practical applications of permanent magnet multipoles2010

    • Author(s)
      Y. Iwashita(1番目), M. Ichikawa
    • Journal Title

      IEEE Trans. Applied Supercond

      Volume: 20 Pages: 842-845

    • DOI

      DOI:10.1109/TASC.2010.2040604

    • Peer Reviewed
  • [Journal Article] Measurement of 0. 511 MeV gamma-rays with a thin long strip of Gd2SiO5 : Ce3+scintillator2009

    • Author(s)
      S. Aogaki, S. Isogai, M. Kobayashi, S. Sugi moto, F. Takeutchi and Y. Tamagawa
    • Journal Title

      Nucl. Instr. Meth

      Volume: A614 Pages: 250-259

    • DOI

      DOI:10.1016/j.nima.2009.12.041

    • Peer Reviewed
  • [Journal Article] Evidence forπK-atoms with DIRAC2009

    • Author(s)
      B. Adeva, M. Chiba(10番目), M. Kobayashi(34番目), K. Okada(52番目), F. Takeutchi(69番目)
    • Journal Title

      Physics Letters

      Volume: B 674 Pages: 11-16

    • DOI

      DOI:10.1016/j.physletb.2009.03.001

    • Peer Reviewed
  • [Journal Article] 低価格高分解能PET制作を目的としたガンマ線イメージャー2009

    • Author(s)
      青垣総一郎、竹内富士雄
    • Journal Title

      京都産業大学先端科学技術研究所所報

      Volume: 第8号 Pages: 27-48

  • [Journal Article] Rader for salt ultra-high-energy neutrino detector and contribution of W-gluon fusion process to collision of neutrinos against protons2009

    • Author(s)
      M. Chiba(1番目), Y. Arakawa, (他10名)
    • Journal Title

      Nucl. Instr. Meth

      Volume: A604 Pages: S233-S235

    • DOI

      DOI:10.1016/j.nima.2009.03.066

    • Peer Reviewed
  • [Journal Article] A small angle neutron scattering(SANS) experiment using very cold neutrons(VCN)2009

    • Author(s)
      M. Bleuel, Y. Iwashita(7番目), (他9名)
    • Journal Title

      Physica B, Elsevier

      Volume: 404 Pages: 2629-2632

    • DOI

      DOI:10.1016/j.physb.2009.06.048

    • Peer Reviewed
  • [Journal Article] Development of modulating permanent magnet sextupole lens for focusingof pulsed cold neutrons2009

    • Author(s)
      M. Yamada, Y. Iwashita(5番目), M. Ichikawa, (他22名)
    • Journal Title

      Physica B, Elsevier

      Volume: 404 Pages: 2646-2651

    • DOI

      DOI:10.1016/j.physb.2009.06.132

    • Peer Reviewed
  • [Journal Article] Depth of interaction measured with LYSO(Ce) scintillator in a new method2008

    • Author(s)
      S. Aogaki, H. Kotaka, I. Moritani and F. Takeutchi
    • Journal Title

      京都産業大学先端科学技術研究所所報

      Volume: 第7号 Pages: 115-124

  • [Journal Article] Study on the light insulator between scintillator crystals2008

    • Author(s)
      H. Kotaka, S. Aogaki, I. Moritani, F. Takeutchi and F. M. Toyama
    • Journal Title

      京都産業大学先端科学技術研究所所報

      Volume: 第7号 Pages: 93-114

  • [Journal Article] Variable permanent magnet sextupole lens for forcusing of pulsed cold neutrons2008

    • Author(s)
      Y. Iwashita(1番目), Y. Tajima, (他5名)
    • Journal Title

      Nucl. Instr. Meth

      Volume: A586 Pages: 73-76

    • DOI

      DOI:10.1016/j.nima.2007.11.058

    • Peer Reviewed
  • [Presentation] Performance of a 511keV gamma-ray imager using a LYSO(Ce) crystal array with wave-length shifter2009

    • Author(s)
      S. Aogaki, F. Takeutchi
    • Organizer
      10th Int. Conf. on Inorganic Scintillators and their Applications
    • Place of Presentation
      韓国済州道西帰浦市
    • Year and Date
      2009-06-10
  • [Remarks]

    • URL

      http://dirac.web.cern.ch/DIRAC/

URL: 

Published: 2013-07-31  

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