2012 Fiscal Year Final Research Report
A Precision Measurement of the Branching Ratio in Pion Decay and Search for the Physics beyond the Standard Model
| Project/Area Number |
21340059
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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 | Osaka University |
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Principal Investigator |
AOKI Masaharu 大阪大学, 理学研究科, 准教授 (80290849)
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| Co-Investigator(Kenkyū-buntansha) |
YOSHIDA Makoto 高エネルギー加速器研究機構, 素粒子原子核研究所, 助教 (70379303)
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| Co-Investigator(Renkei-kenkyūsha) |
IGARASHI Youichi 高エネルギー加速器研究機構, 素粒子原子核研究所, 助教 (50311121)
KOMATSUBARA Takeshi 高エネルギー加速器研究機構, 素粒子原子核研究所, 教授 (30242168)
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| Research Collaborator |
BRYMAN Douglas University of British Columbia (Canada), Professor
NUMAO Toshio TRIUMF (Canada), 上級研究員
ITOU Shintaro 大阪大学, 大学院・理学研究科, 博士前期大学院生
ITOU Naosuke 大阪大学, 大学院・理学研究科, 博士前期大学院生
YAMADA Kaoru 大阪大学, 大学院・理学研究科, 博士前期大学院生
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| Project Period (FY) |
2009 – 2012
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| Keywords | 素粒子(実験) / 精密測定 / レプトン普遍性 / 荷電ヒッグス |
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| Research Abstract |
An experiment to search for new physics beyond the Standard Model of particle physics by measuring the branching ratio of pion decays was performed. Adetector which was built with a large NaI(Tl) single crystal was installed at M13 beam line at TRIUMF, and a physics data taking was performed. A physics analysis with 10% of whole data set was performed, and it is confirmed that the final sensitivity with whole data set will be better than 0.1% in relative error. The physics analysis is expected to take more time since a blind analysis policy is adopted. New upper limits on massive neutrinos were obtained.
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