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2001 Fiscal Year Final Research Report Summary

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
KeywordsDIRAC experiment / CERN PS212 / Non-perturbative QCD / Scattering length of pion / hadronic atom / Kπ atom / Scifi hodoscope / Silicon microstrip counter
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.

  • Research Products

    (16 results)

All Other

All Publications (16 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
  • [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
  • [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
  • [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
  • [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
  • [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
  • [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
  • [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
  • [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
  • [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
  • [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
  • [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
  • [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
  • [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
  • [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
  • [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

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Published: 2004-04-14  

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