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Test of QCD by means of the measurement of the pion scattering length

Research Project

Project/Area Number 11440082
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 InstitutionKyoto Sangyo University

Principal Investigator

TAKEUTCHI Fujio  Faculty of Science, Kyoto Sangyo University, Professor, 理学部, 教授 (40121537)

Co-Investigator(Kenkyū-buntansha) YOSHIMURA Yoshio  KEK, Inst. For elem. Part. And nucl. Study, 教授 (50013397)
KOBAYASHI Masaaki  KEK, Inst. For elem. Part. And nucl. Study, 教授 (40013388)
OKADA Kenji  Faculty of Science, Kyoto Sangyo University, Professor, 理学部, 教授 (90093385)
Project Period (FY) 1999 – 2001
Project Status Completed (Fiscal Year 2001)
Budget Amount *help
¥7,800,000 (Direct Cost: ¥7,800,000)
Fiscal Year 2001: ¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 2000: ¥2,900,000 (Direct Cost: ¥2,900,000)
Fiscal Year 1999: ¥3,300,000 (Direct Cost: ¥3,300,000)
KeywordsDIRAC experiment / CERN PS212 / Non-perturbative QCD / Scattering length of pion / hadronic atom / Kπ atom / Scifi hodoscope / Silicon microstrip counter / パイオニック原子 / ハドロニック原子A_<2π> / π散乱長 / 非摂動領域のQCD / カイラルパーターベーション / CERN PS実験 / PS212 / π^+π^-原始の寿命直接測定 / カイラル摂動理論 / シンチレーティングファイバーホトスコープ
Research Abstract

The principal objective of this study is to carry out the PS212 experiment at CERN (DIRAC). The aim of the experiment is to find out the pi-pi scattering length by measuring the life-time of the A_<2π> atom, and compare it with the theoretical value precisely obtained from the QCD.
The experiment was approved in 1996, and since then the Japanese group takes care of the fabrication and maintenance of the topological trigger device to pick up the specific pion pairs in the very intense beam. The data taking has started in 1999. Since then the data taking continues, and the expected statics will be achieved in the next year. The data analysis is also parallelly in progress, and we expect to publish the experimental result soon.
In addition to the data-taking, improvement of the spectrometer in order to measure the K-pi scattering length is also studied.

Report

(4 results)
  • 2001 Annual Research Report   Final Research Report Summary
  • 2000 Annual Research Report
  • 1999 Annual Research Report
  • Research Products

    (28 results)

All Other

All Publications (28 results)

  • [Publications] L.Afanasyev, et al.: "The multilevel trigger system of the DIRAC experiment"Nucl.Instrum.Meth.in Phys.Res.. A491. 376-389 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] M.Kobayashi, et al.: "Silicon strip detector as a real-time, fast medium-segmented hodoscope"Nucl.Instrum.Meth.in Phys.Res.. A487. 353-364 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] A.Gorin et al.: "Peak-sensing discriminator for multichannel detectors with cross-talk"Nucl.Instrum.Meth.in Phys.Res.. A452. 280-288 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] I.Daito et al.: "Time resolution of multi-cladding scintillating fiber hodoscope"Nucl.Instrum.Meth.in Phys.Res.. A433. 587-591 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] A.Gorin et al.: "Preliminary study of a topological trigger device for cosmic-ray detectors"Nucl.Instrum.Meth.in Phys.Res.. A421. 60-68 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] A.Gorin et al.: "Scintillating fiber hodoscopes for dirac and compass experiments"Czechoslovak Journal of Physics. 49s2. 173-182 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] M.Kobayashi: "Test of low energy predictions of QCD from measurement of the lifetime of π^+π^--atoms (DIRAC experiment)"Proc.Workshop on chiral dynamics in particle and nuclear physics. Dec.. 148-152 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] F.Takeutchi: "DIRAC experiment at CERN"Proc.Workshop on chiral dynamics in particle and nuclear physics. Dec.. 153-173 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] L. Afanasyev, et al.: "The multilevel trigger system of the DIRAC experiment"Nucl. Instrum. Meth.. A491. 376-389 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] M. Kobayashi, et al.: "Silicon strip detector as a real-time, fast medium-segmented hodoscope"Nucl. Instrum. Meth.. A487. 353-364 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] A. Gorin, et al.: "Peak-sensing discriminator for multichannel detectors with cross-talk"Nucl. Instrum. Meth.. A452. 280-288 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] I. Daito, et al.: "Time resolution of multi-cladding scintillating fiber hodoscope"Nucl. Instrum. Meth.. A433. 587-591 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] A Gorin, et al.: "Preliminary study of a topological trigger device for cosmic-ray detectors"Nucl. Instrum. Meth.. A421. 60-68 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] A. Gorin, et al.: "Scintillating fiber hodoscopes for dirac and compass experiments"Czechoslovak Journal of Physics. 49 (Suppl. S2). (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] M. Kobayashi: "Test of low energy predictions of QCD from measurement of the lifetime of p^+p^--atoms (DIRAC experiment),Proc. Workshop on chiral dynamics in particle and nuclear physics. Dec."KEK. (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] F. Takeutchi: "DIRAC experiment at CERN, Proc. Workshop on chiral dynamics in particle and nuclear physics. Dec."KEK. (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] B.Adeva et al.: "Test of chiral perturbafou theory with DIRAC at CERN"Acta Phys. Polon.. B31. 2571-2579 (2000)

    • Related Report
      2001 Annual Research Report
  • [Publications] A.Gorin et al.: "Peak-sensing discriminator for multichannel derectors with cross-folk"Nucl. Instr. Meth. in Phys. Res.. A452. 280-288 (2000)

    • Related Report
      2001 Annual Research Report
  • [Publications] 竹内 富士雄: "Time resolution of multi-cladding scintillating fiber hodoscope"京都産業大学計算機科学研究所所報. A433. 587-591 (2000)

    • Related Report
      2001 Annual Research Report
  • [Publications] F.Takeuchi for DIRAC: "DIRAC experiment at CERN"Proc. Workshop on Chiral Dynamics and Nucl. Phys., Tokyo 9-10 Dec. 1999. 153-173

    • Related Report
      2001 Annual Research Report
  • [Publications] M.Kobayashi: "Test of low energy predictions of QCD from measurement of the life time of π^+π^-atoms"Proc. Workshop on Chiral Dynamics and Nucl. Phys., Tokyo 9-10 Dec. 1999. 137-151

    • Related Report
      2001 Annual Research Report
  • [Publications] P.Gianotti et al.: "TEST OF CHIRAL PERTURBATION THEORY WITH DIRAC AT CERN"Acta Phys.Polon.. B31. 2571-2579 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] A.Gorin et al.: "PEAK SENSING DISCRIMINATOR FOR MULTICHANNEL DETECTORS WITH CROSS TALK"Nucl.Instrum.Meth.. A452. 280-288 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 竹内富士雄: "DIRAC実験-データアキジションシステムとデータ解析-"京都産業大学計算機科学研究所所報. 17巻1号. 35-45 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] A. Gorin et al.: "Scintillating fiber hodoscopes for DIRAC and COMPASS experiments"Czechoslovak Journal of Physics. 49. 52 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] I. Daito et al.: "T ime resolution of multi-cladding scintillating fiber hodoscpe"Nucl. Instr. Meth. In Phys. Res.. A433. 587 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] F. Takeutchi: "DIRAC experiment at CERN"Proc. KEK woekshop on chiral dynamics and particle and nuclear experiments 1999. (発表予定). (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] M. Kobayashi: "Test of low energy prediction of QCD from measurement of the lifetime of π+π- atoms (DIRAC experiment)"Proc. KEK woekshop on chiral dynamics and particle and nuclear experiments 1999. (発表予定). (2000)

    • Related Report
      1999 Annual Research Report

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Published: 1999-04-01   Modified: 2016-04-21  

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