| Project/Area Number |
11440082
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
素粒子・核・宇宙線
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| Research Institution | Kyoto Sangyo University |
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Principal Investigator |
TAKEUTCHI Fujio Faculty of Science, Kyoto Sangyo University, Professor, 理学部, 教授 (40121537)
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| 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)
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| Project Period (FY) |
1999 – 2001
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| Project Status |
Completed (Fiscal Year 2001)
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| 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)
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| Keywords | DIRAC 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 |
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| 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.
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