2010 Fiscal Year Final Research Report
Search for new phenomena in the FCNC rare decays of neutral K meson
| Project/Area Number |
20540295
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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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 | Saga University |
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Principal Investigator |
SUZUKI Shiro Saga University, 工学系研究科, 教授 (50089851)
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| Co-Investigator(Kenkyū-buntansha) |
WATANABE Hiroaki 高エネルギー加速器研究機構, 素粒子原子核研究所, 助教 (00415043)
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| Research Collaborator |
OGATA Risa 佐賀大学, 大学院・工学系研究科, 博士後期課程学生
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| Project Period (FY) |
2008 – 2010
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| Keywords | 素粒子(実験) |
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| Research Abstract |
FCNC rare decays, which are suppressed in the Standard model (SM), are sensitive to ontributions from unknown particles, and are ideal places to look for new phenomena beyond the SM and examine the various phenomenological models. We have analyzedthe K_L→π^0π^0X(X=μμ)process and made a search for X(214) particle in theμμfinal state. We settled the upper limit of the production and decay (1.6x10^-6). Also we have made a study of KL π^0π^0・υυdecay, which gives the ? parameter in the Kobayashi-Maskawa matrix, and gotten the results which made an order of magnitude improvement on the upper limit of the decay branching fraction.
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