2011 Fiscal Year Final Research Report
Test of QCD by measuring a lifetime ofπK atoms-Extended DIRAC-
| Project/Area Number |
20340059
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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 |
Particle/Nuclear/Cosmic ray/Astro physics
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| Research Institution | Kyoto Sangyo University |
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Principal Investigator |
OKADA Kenji 京都産業大学, コンピュータ理工学部, 教授 (90093385)
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| 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)
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| 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)
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| Project Period (FY) |
2008 – 2011
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| Keywords | 2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 |
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| 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.
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Research Products
(18 results)
